diff --git a/mls-rs-codec-derive/Cargo.toml b/mls-rs-codec-derive/Cargo.toml
index 2f786bdf..8f9ff814 100644
--- a/mls-rs-codec-derive/Cargo.toml
+++ b/mls-rs-codec-derive/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "mls-rs-codec-derive"
-version = "0.1.0"
+version = "0.1.1"
 edition = "2021"
 description = "Derive macro crate for mls-rs-codec"
 homepage = "https://github.com/awslabs/mls-rs"
diff --git a/mls-rs-codec/Cargo.toml b/mls-rs-codec/Cargo.toml
index c4f5e910..85266b00 100644
--- a/mls-rs-codec/Cargo.toml
+++ b/mls-rs-codec/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "mls-rs-codec"
-version = "0.5.1"
+version = "0.5.2"
 edition = "2021"
 description = "TLS codec and MLS specific encoding used by mls-rs"
 homepage = "https://github.com/awslabs/mls-rs"
@@ -14,7 +14,7 @@ preallocate = []
 std = ["dep:thiserror"]
 
 [dependencies]
-mls-rs-codec-derive = { version = "0.1.0", path = "../mls-rs-codec-derive" }
+mls-rs-codec-derive = { version = "0.1.1", path = "../mls-rs-codec-derive" }
 thiserror = { version = "1.0.40", optional = true }
 
 [dev-dependencies]
diff --git a/mls-rs-core/Cargo.toml b/mls-rs-core/Cargo.toml
index 282adfc1..98521a93 100644
--- a/mls-rs-core/Cargo.toml
+++ b/mls-rs-core/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "mls-rs-core"
-version = "0.17.1"
+version = "0.18.0"
 edition = "2021"
 description = "Core components and traits for mls-rs"
 homepage = "https://github.com/awslabs/mls-rs"
@@ -22,7 +22,7 @@ test_suite = ["serde", "dep:serde_json", "dep:itertools"]
 serde = ["dep:serde", "zeroize/serde", "hex/serde", "dep:serde_bytes"]
 
 [dependencies]
-mls-rs-codec = { version = "0.5.0", path = "../mls-rs-codec", default-features = false}
+mls-rs-codec = { version = "0.5.2", path = "../mls-rs-codec", default-features = false}
 zeroize = { version = "1", default-features = false, features = ["alloc", "zeroize_derive"] }
 arbitrary = { version = "1", features = ["derive"], optional = true }
 thiserror = { version = "1.0.40", optional = true }
diff --git a/mls-rs-crypto-awslc/Cargo.toml b/mls-rs-crypto-awslc/Cargo.toml
index 4dc7f539..31759e9a 100644
--- a/mls-rs-crypto-awslc/Cargo.toml
+++ b/mls-rs-crypto-awslc/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "mls-rs-crypto-awslc"
-version = "0.10.0"
+version = "0.11.0"
 edition = "2021"
 description = "AWS-LC based CryptoProvider for mls-rs"
 homepage = "https://github.com/awslabs/mls-rs"
@@ -9,20 +9,20 @@ keywords = ["mls", "mls-rs", "aws-lc"]
 license = "Apache-2.0 OR MIT"
 
 [dependencies]
-aws-lc-rs = "1.6.1"
+aws-lc-rs = "1.6.2"
 aws-lc-sys = { version = "0.13.0" }
-mls-rs-core = { path = "../mls-rs-core", version = "0.17.1" }
-mls-rs-crypto-hpke = { path = "../mls-rs-crypto-hpke", version = "0.8.0" }
-mls-rs-crypto-traits = { path = "../mls-rs-crypto-traits", version = "0.9.0" }
-mls-rs-identity-x509 = { path = "../mls-rs-identity-x509", version = "0.10.0" }
+mls-rs-core = { path = "../mls-rs-core", version = "0.18.0" }
+mls-rs-crypto-hpke = { path = "../mls-rs-crypto-hpke", version = "0.9.0" }
+mls-rs-crypto-traits = { path = "../mls-rs-crypto-traits", version = "0.10.0" }
+mls-rs-identity-x509 = { path = "../mls-rs-identity-x509", version = "0.11.0" }
 thiserror = "1.0.40"
 zeroize = { version = "1", features = ["zeroize_derive"] }
 maybe-async = "0.2.10"
 
 [dev-dependencies]
 assert_matches = "1.5.0"
-mls-rs-core = { path = "../mls-rs-core", version = "0.17.1", features = ["test_suite"] }
-mls-rs-crypto-hpke = { path = "../mls-rs-crypto-hpke", version = "0.8.0", features = ["test_utils"] }
+mls-rs-core = { path = "../mls-rs-core", version = "0.18.0", features = ["test_suite"] }
+mls-rs-crypto-hpke = { path = "../mls-rs-crypto-hpke", version = "0.9.0", features = ["test_utils"] }
 futures-test = "0.3.25"
 
 [target.'cfg(mls_build_async)'.dependencies]
diff --git a/mls-rs-crypto-hpke/Cargo.toml b/mls-rs-crypto-hpke/Cargo.toml
index e6277042..7da364f8 100644
--- a/mls-rs-crypto-hpke/Cargo.toml
+++ b/mls-rs-crypto-hpke/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "mls-rs-crypto-hpke"
-version = "0.8.0"
+version = "0.9.0"
 edition = "2021"
 description = "HPKE implementation based on mls-rs-crypto-traits used by mls-rs"
 homepage = "https://github.com/awslabs/mls-rs"
@@ -15,8 +15,8 @@ std = ["mls-rs-core/std", "mls-rs-crypto-traits/std", "dep:thiserror", "zeroize/
 test_utils = ["mls-rs-core/test_suite"]
 
 [dependencies]
-mls-rs-core = { path = "../mls-rs-core", default-features = false, version = "0.17.0" }
-mls-rs-crypto-traits = { path = "../mls-rs-crypto-traits", default-features = false, version = "0.9.0" }
+mls-rs-core = { path = "../mls-rs-core", default-features = false, version = "0.18.0" }
+mls-rs-crypto-traits = { path = "../mls-rs-crypto-traits", default-features = false, version = "0.10.0" }
 thiserror = { version = "1.0.40", optional = true }
 zeroize = { version = "1", default-features = false, features = ["alloc", "zeroize_derive"] }
 cfg-if = "^1"
@@ -28,7 +28,7 @@ serde_json = { version = "^1.0" }
 assert_matches = "1.5.0"
 mockall = "0.12"
 hex = { version = "^0.4.3", features = ["serde"] }
-mls-rs-crypto-traits = { path = "../mls-rs-crypto-traits", features = ["mock"], version = "0.9.0" }
+mls-rs-crypto-traits = { path = "../mls-rs-crypto-traits", features = ["mock"], version = "0.10.0" }
 
 [target.'cfg(target_arch = "wasm32")'.dev-dependencies]
 wasm-bindgen-test = { version = "0.3.26", default-features = false }
diff --git a/mls-rs-crypto-openssl/Cargo.toml b/mls-rs-crypto-openssl/Cargo.toml
index f301a9b3..05fdd102 100644
--- a/mls-rs-crypto-openssl/Cargo.toml
+++ b/mls-rs-crypto-openssl/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "mls-rs-crypto-openssl"
-version = "0.8.0"
+version = "0.9.0"
 edition = "2021"
 description = "OpenSSL based CryptoProvider for mls-rs"
 homepage = "https://github.com/awslabs/mls-rs"
@@ -14,10 +14,10 @@ default = ["x509"]
 
 [dependencies]
 openssl = { version = "0.10.40" }
-mls-rs-core = { path = "../mls-rs-core", version = "0.17.0" }
-mls-rs-identity-x509 = { path = "../mls-rs-identity-x509", optional = true, version = "0.10.0" }
-mls-rs-crypto-hpke = { path = "../mls-rs-crypto-hpke", version = "0.8.0" }
-mls-rs-crypto-traits = { path = "../mls-rs-crypto-traits", version = "0.9.0" }
+mls-rs-core = { path = "../mls-rs-core", version = "0.18.0" }
+mls-rs-identity-x509 = { path = "../mls-rs-identity-x509", optional = true, version = "0.11.0" }
+mls-rs-crypto-hpke = { path = "../mls-rs-crypto-hpke", version = "0.9.0" }
+mls-rs-crypto-traits = { path = "../mls-rs-crypto-traits", version = "0.10.0" }
 thiserror = "1.0.40"
 zeroize = { version = "1", features = ["zeroize_derive"] }
 maybe-async = "0.2.10"
@@ -27,8 +27,8 @@ hex = { version = "^0.4.3", features = ["serde"] }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = { version = "^1.0" }
 assert_matches = "1.5.0"
-mls-rs-core = { path = "../mls-rs-core", version = "0.17.0", features = ["test_suite"] }
-mls-rs-crypto-hpke = { path = "../mls-rs-crypto-hpke", version = "0.8.0", features = ["test_utils"] }
+mls-rs-core = { path = "../mls-rs-core", version = "0.18.0", features = ["test_suite"] }
+mls-rs-crypto-hpke = { path = "../mls-rs-crypto-hpke", version = "0.9.0", features = ["test_utils"] }
 
 [target.'cfg(mls_build_async)'.dependencies]
 async-trait = "0.1.74"
diff --git a/mls-rs-crypto-rustcrypto/Cargo.toml b/mls-rs-crypto-rustcrypto/Cargo.toml
index f0081e2b..555ac14c 100644
--- a/mls-rs-crypto-rustcrypto/Cargo.toml
+++ b/mls-rs-crypto-rustcrypto/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "mls-rs-crypto-rustcrypto"
-version = "0.9.0"
+version = "0.10.0"
 edition = "2021"
 description = "RustCrypto based CryptoProvider for mls-rs"
 homepage = "https://github.com/awslabs/mls-rs"
@@ -29,9 +29,9 @@ std = [
 ]
 
 [dependencies]
-mls-rs-core = { path = "../mls-rs-core", default-features = false, version = "0.17.0" }
-mls-rs-crypto-hpke = { path = "../mls-rs-crypto-hpke", default-features = false, version = "0.8.0" }
-mls-rs-crypto-traits = { path = "../mls-rs-crypto-traits", default-features = false, version = "0.9.0" }
+mls-rs-core = { path = "../mls-rs-core", default-features = false, version = "0.18.0" }
+mls-rs-crypto-hpke = { path = "../mls-rs-crypto-hpke", default-features = false, version = "0.9.0" }
+mls-rs-crypto-traits = { path = "../mls-rs-crypto-traits", default-features = false, version = "0.10.0" }
 
 thiserror = { version = "1.0.40", optional = true }
 zeroize = { version = "1", default-features = false, features = ["alloc", "zeroize_derive"] }
@@ -58,7 +58,7 @@ ed25519-dalek = { version = "2", default-features = false, features = ["alloc",
 sec1 = { version = "0.7", default-features = false, features = ["alloc"] }
 
 # X509 feature
-mls-rs-identity-x509 = { path = "../mls-rs-identity-x509", optional = true, version = "0.10.0" }
+mls-rs-identity-x509 = { path = "../mls-rs-identity-x509", optional = true, version = "0.11.0" }
 x509-cert = { version = "0.2", optional = true, features = ["std"] }
 spki = { version = "0.7", optional = true, features = ["std", "alloc"] }
 const-oid = { version = "0.9", optional = true, features = ["std"] }
@@ -69,8 +69,8 @@ hex = { version = "^0.4.3", features = ["serde"] }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = { version = "^1.0" }
 assert_matches = "1.5.0"
-mls-rs-core = { path = "../mls-rs-core", version = "0.17.0", features = ["test_suite"] }
-mls-rs-crypto-hpke = { path = "../mls-rs-crypto-hpke", default-features = false, version = "0.8.0", features = ["test_utils"] }
+mls-rs-core = { path = "../mls-rs-core", version = "0.18.0", features = ["test_suite"] }
+mls-rs-crypto-hpke = { path = "../mls-rs-crypto-hpke", default-features = false, version = "0.9.0", features = ["test_utils"] }
 
 [target.'cfg(mls_build_async)'.dependencies]
 async-trait = "0.1.74"
diff --git a/mls-rs-crypto-traits/Cargo.toml b/mls-rs-crypto-traits/Cargo.toml
index f976443b..49d7a1fe 100644
--- a/mls-rs-crypto-traits/Cargo.toml
+++ b/mls-rs-crypto-traits/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "mls-rs-crypto-traits"
-version = "0.9.0"
+version = "0.10.0"
 edition = "2021"
 description = "Crypto traits required to create a CryptoProvider for mls-rs"
 homepage = "https://github.com/awslabs/mls-rs"
@@ -14,7 +14,7 @@ std = ["mls-rs-core/std"]
 default = ["std"]
 
 [dependencies]
-mls-rs-core = { path = "../mls-rs-core", version = "0.17.0", default-features = false }
+mls-rs-core = { path = "../mls-rs-core", version = "0.18.0", default-features = false }
 mockall = { version = "^0.11", optional = true }
 maybe-async = "0.2.10"
 
diff --git a/mls-rs-crypto-webcrypto/Cargo.toml b/mls-rs-crypto-webcrypto/Cargo.toml
index a0a53ffd..a6790088 100644
--- a/mls-rs-crypto-webcrypto/Cargo.toml
+++ b/mls-rs-crypto-webcrypto/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "mls-rs-crypto-webcrypto"
-version = "0.3.0"
+version = "0.4.0"
 edition = "2021"
 description = "SubtleCrypto based CryptoProvider for supporting mls-rs in a browser"
 homepage = "https://github.com/awslabs/mls-rs"
@@ -9,9 +9,9 @@ keywords = ["mls", "mls-rs"]
 license = "Apache-2.0 OR MIT"
 
 [dependencies]
-mls-rs-core = { path = "../mls-rs-core", default-features = false, features = ["std"], version = "0.17.0" }
-mls-rs-crypto-hpke = { path = "../mls-rs-crypto-hpke", default-features = false, features = ["std"], version = "0.8.0" }
-mls-rs-crypto-traits = { path = "../mls-rs-crypto-traits", default-features = false, features = ["std"], version = "0.9.0" }
+mls-rs-core = { path = "../mls-rs-core", default-features = false, features = ["std"], version = "0.18.0" }
+mls-rs-crypto-hpke = { path = "../mls-rs-crypto-hpke", default-features = false, features = ["std"], version = "0.9.0" }
+mls-rs-crypto-traits = { path = "../mls-rs-crypto-traits", default-features = false, features = ["std"], version = "0.10.0" }
 thiserror = "1.0.40"
 zeroize = { version = "1", features = ["zeroize_derive"] }
 maybe-async = "0.2.10"
@@ -26,7 +26,7 @@ web-sys = { version = "0.3.64", features = ["Window", "CryptoKey", "CryptoKeyPai
 const-oid = { version = "0.9", features = ["db"] }
 
 [dev-dependencies]
-mls-rs-core = { path = "../mls-rs-core", version = "0.17.0", features = ["test_suite"] }
+mls-rs-core = { path = "../mls-rs-core", version = "0.18.0", features = ["test_suite"] }
 wasm-bindgen-test = { version = "0.3.26", default-features = false }
 futures-test = "0.3.25"
 serde_json = "^1.0"
diff --git a/mls-rs-ffi/Cargo.toml b/mls-rs-ffi/Cargo.toml
index 62972ac6..c2529949 100644
--- a/mls-rs-ffi/Cargo.toml
+++ b/mls-rs-ffi/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "mls-rs-ffi"
-version = "0.5.0"
+version = "0.6.0"
 edition = "2021"
 description = "Helper crate to generate FFI definitions for mls-rs"
 homepage = "https://github.com/awslabs/mls-rs"
@@ -19,9 +19,9 @@ std = ["mls-rs/std", "safer-ffi-gen/std"]
 x509 = ["mls-rs-identity-x509"]
 
 [dependencies]
-mls-rs = { path = "../mls-rs", version = "0.38.0", features = ["ffi"] }
-mls-rs-crypto-openssl = { path = "../mls-rs-crypto-openssl", version = "0.8.0", optional = true }
-mls-rs-identity-x509 = { path = "../mls-rs-identity-x509", version = "0.10.0", optional = true }
-mls-rs-provider-sqlite = { path = "../mls-rs-provider-sqlite", version = "0.10.0", default-features = false, optional = true }
+mls-rs = { path = "../mls-rs", version = "0.39.0", features = ["ffi"] }
+mls-rs-crypto-openssl = { path = "../mls-rs-crypto-openssl", version = "0.9.0", optional = true }
+mls-rs-identity-x509 = { path = "../mls-rs-identity-x509", version = "0.11.0", optional = true }
+mls-rs-provider-sqlite = { path = "../mls-rs-provider-sqlite", version = "0.11.0", default-features = false, optional = true }
 safer-ffi = { version = "0.1.3", default-features = false }
 safer-ffi-gen = { version = "0.9.2", default-features = false }
diff --git a/mls-rs-identity-x509/Cargo.toml b/mls-rs-identity-x509/Cargo.toml
index 9a0d5f55..f3063490 100644
--- a/mls-rs-identity-x509/Cargo.toml
+++ b/mls-rs-identity-x509/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "mls-rs-identity-x509"
-version = "0.10.0"
+version = "0.11.0"
 edition = "2021"
 description = "X509 Identity utilities for mls-rs"
 homepage = "https://github.com/awslabs/mls-rs"
@@ -13,7 +13,7 @@ default = ["std"]
 std = ["mls-rs-core/std", "dep:thiserror"]
 
 [dependencies]
-mls-rs-core = { path = "../mls-rs-core", default-features = false, features = ["x509"], version = "0.17.0" }
+mls-rs-core = { path = "../mls-rs-core", default-features = false, features = ["x509"], version = "0.18.0" }
 maybe-async = "0.2.10"
 thiserror = { version = "1.0.40", optional = true }
 
diff --git a/mls-rs-provider-sqlite/Cargo.toml b/mls-rs-provider-sqlite/Cargo.toml
index b81b90e2..103bf757 100644
--- a/mls-rs-provider-sqlite/Cargo.toml
+++ b/mls-rs-provider-sqlite/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "mls-rs-provider-sqlite"
-version = "0.10.0"
+version = "0.11.0"
 edition = "2021"
 description = "SQLite based state storage for mls-rs"
 homepage = "https://github.com/awslabs/mls-rs"
@@ -9,11 +9,11 @@ keywords = ["mls", "mls-rs"]
 license = "Apache-2.0 OR MIT"
 
 [dependencies]
-mls-rs-core = { path = "../mls-rs-core", version = "0.17.0" }
+mls-rs-core = { path = "../mls-rs-core", version = "0.18.0" }
 thiserror = "1.0.40"
 wasm-bindgen = { version = "0.2", optional = true }
 zeroize = { version = "1", features = ["zeroize_derive"] }
-rusqlite = { version = "0.30", default-features = false }
+rusqlite = { version = "0.31", default-features = false }
 rand = "0.8"
 hex = { version = "0.4" }
 maybe-async = "0.2.10"
diff --git a/mls-rs-uniffi/Cargo.toml b/mls-rs-uniffi/Cargo.toml
index 49117c8d..62ab5fc3 100644
--- a/mls-rs-uniffi/Cargo.toml
+++ b/mls-rs-uniffi/Cargo.toml
@@ -17,9 +17,9 @@ name = "mls_rs_uniffi"
 [dependencies]
 async-trait = "0.1.77"
 maybe-async = "0.2.10"
-mls-rs = { path = "../mls-rs" }
-mls-rs-core = { path = "../mls-rs-core" }
-mls-rs-crypto-openssl = { path = "../mls-rs-crypto-openssl" }
+mls-rs = { version = "0.39.0", path = "../mls-rs" }
+mls-rs-core = { version = "0.18.0", path = "../mls-rs-core" }
+mls-rs-crypto-openssl = { version = "0.9.0", path = "../mls-rs-crypto-openssl" }
 thiserror = "1.0.57"
 uniffi = "0.26.0"
 
diff --git a/mls-rs-uniffi/tests/custom_storage_sync.py b/mls-rs-uniffi/tests/custom_storage_sync.py
new file mode 100644
index 00000000..a8bec343
--- /dev/null
+++ b/mls-rs-uniffi/tests/custom_storage_sync.py
@@ -0,0 +1,87 @@
+from dataclasses import dataclass, field
+
+from mls_rs_uniffi import CipherSuite, generate_signature_keypair, Client, \
+    GroupStateStorage, EpochRecord, ClientConfig, ProtocolVersion
+
+
+@dataclass
+class GroupStateData:
+    state: bytes
+    epoch_data: list[EpochRecord] = field(default_factory=list)
+
+
+class PythonGroupStateStorage(GroupStateStorage):
+
+    def __init__(self):
+        self.groups: dict[str, GroupStateData] = {}
+
+    def state(self, group_id: bytes):
+        group = self.groups.get(group_id.hex())
+        if group == None:
+            return None
+
+        return group.state
+
+    def epoch(self, group_id: bytes, epoch_id: int):
+        group = self.groups.get(group_id.hex())
+        if group == None:
+            return None
+
+        for epoch in group.epoch_data:
+            if epoch.id == epoch_id:
+                return epoch
+
+        return None
+
+    def write(self, group_id: bytes, group_state: bytes,
+              epoch_inserts: list[EpochRecord],
+              epoch_updates: list[EpochRecord]):
+        if group_id.hex() not in self.groups:
+            self.groups[group_id.hex()] = GroupStateData(group_state)
+        group = self.groups[group_id.hex()]
+
+        for insert in epoch_inserts:
+            group.epoch_data.append(insert)
+
+        for update in epoch_updates:
+            for i in range(len(group.epoch_data)):
+                if group.epoch_data[i].id == update.id:
+                    group.epoch_data[i] = update
+
+    def max_epoch_id(self, group_id: bytes):
+        group = self.groups.get(group_id.hex())
+        if group == None:
+            return None
+
+        last = group.epoch_data.last()
+
+        if last == None:
+            return None
+
+        return last.id
+
+
+group_state_storage = PythonGroupStateStorage()
+client_config = ClientConfig(group_state_storage,
+                             use_ratchet_tree_extension=True)
+
+key = generate_signature_keypair(CipherSuite.CURVE25519_AES128)
+alice = Client(b'alice', key, client_config)
+
+key = generate_signature_keypair(CipherSuite.CURVE25519_AES128)
+bob = Client(b'bob', key, client_config)
+
+alice = alice.create_group(None)
+message = bob.generate_key_package_message()
+
+output = alice.add_members([message])
+alice.process_incoming_message(output.commit_message)
+bob = bob.join_group(None, output.welcome_messages[0]).group
+
+msg = alice.encrypt_application_message(b'hello, bob')
+output = bob.process_incoming_message(msg)
+
+alice.write_to_storage()
+
+assert output.data == b'hello, bob'
+assert len(group_state_storage.groups) == 1
diff --git a/mls-rs-uniffi/tests/scenarios.rs b/mls-rs-uniffi/tests/scenarios.rs
index fb65c9f8..b81d86a4 100644
--- a/mls-rs-uniffi/tests/scenarios.rs
+++ b/mls-rs-uniffi/tests/scenarios.rs
@@ -44,6 +44,7 @@ macro_rules! generate_python_tests {
 
 generate_python_tests!(generate_signature_keypair, None);
 generate_python_tests!(client_config_default_sync, None);
+generate_python_tests!(custom_storage_sync, None);
 generate_python_tests!(roster_update_sync, None);
 
 // TODO(mulmarta): it'll break if we use async trait which will be
diff --git a/mls-rs-uniffi/tests/simple_scenario_sync.py b/mls-rs-uniffi/tests/simple_scenario_sync.py
index 27a98fa8..f3a50b4b 100644
--- a/mls-rs-uniffi/tests/simple_scenario_sync.py
+++ b/mls-rs-uniffi/tests/simple_scenario_sync.py
@@ -1,66 +1,7 @@
-from dataclasses import dataclass, field
-
 from mls_rs_uniffi import CipherSuite, generate_signature_keypair, Client, \
-    GroupStateStorage, EpochRecord, ClientConfig, ProtocolVersion
-
-@dataclass
-class GroupStateData:
-    state: bytes
-    epoch_data: list[EpochRecord] = field(default_factory=list)
-
-class PythonGroupStateStorage(GroupStateStorage):
-    def __init__(self):
-        self.groups: dict[str, GroupStateData] = {}
-
-    def state(self, group_id: bytes):
-        group = self.groups.get(group_id.hex())
-
-        if group == None:
-            return None 
-
-        return group.state
-
-    def epoch(self, group_id: bytes, epoch_id: int):
-        group = self.groups[group_id.hex()]
-
-        if group == None:
-            return None
-
-        for epoch in group.epoch_data:
-            if epoch.id == epoch_id:
-                return epoch
-
-        return None
-
-    def write(self, group_id: bytes, group_state: bytes, epoch_inserts: list[EpochRecord], epoch_updates: list[EpochRecord]):
-        if self.groups.get(group_id.hex()) == None:
-            self.groups[group_id.hex()] = GroupStateData(group_state)
-
-        group = self.groups[group_id.hex()]
-
-        for insert in epoch_inserts:
-            group.epoch_data.append(insert)
-
-        for update in epoch_updates:
-            for i in range(len(group.epoch_data)):
-                if group.epoch_data[i].id == update.id:
-                    group.epoch_data[i] = update
-
-    def max_epoch_id(self, group_id: bytes):
-        group = self.groups.get(group_id.hex())
-
-        if group == None:
-            return None 
-
-        last = group.epoch_data.last()
-
-        if last == None:
-            return None
-
-        return last.id
+    client_config_default
 
-group_state_storage = PythonGroupStateStorage()
-client_config = ClientConfig(group_state_storage, use_ratchet_tree_extension=True)
+client_config = client_config_default()
 
 key = generate_signature_keypair(CipherSuite.CURVE25519_AES128)
 alice = Client(b'alice', key, client_config)
@@ -81,4 +22,3 @@ def max_epoch_id(self, group_id: bytes):
 alice.write_to_storage()
 
 assert output.data == b'hello, bob'
-assert len(group_state_storage.groups) == 1
diff --git a/mls-rs/Cargo.toml b/mls-rs/Cargo.toml
index cc3fd79b..bf8c8f78 100644
--- a/mls-rs/Cargo.toml
+++ b/mls-rs/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "mls-rs"
-version = "0.38.0"
+version = "0.39.0"
 edition = "2021"
 description = "An implementation of Messaging Layer Security (RFC 9420)"
 homepage = "https://github.com/awslabs/mls-rs"
@@ -51,10 +51,10 @@ benchmark_util = ["test_util", "default", "dep:mls-rs-crypto-openssl"]
 fuzz_util = ["test_util", "default", "dep:once_cell", "dep:mls-rs-crypto-openssl"]
 
 [dependencies]
-mls-rs-core = { path = "../mls-rs-core", default-features = false, version = "0.17.1" }
-mls-rs-identity-x509 = { path = "../mls-rs-identity-x509", default-features = false, version = "0.10.0", optional = true }
+mls-rs-core = { path = "../mls-rs-core", default-features = false, version = "0.18.0" }
+mls-rs-identity-x509 = { path = "../mls-rs-identity-x509", default-features = false, version = "0.11.0", optional = true }
 zeroize = { version = "1", default-features = false, features = ["alloc", "zeroize_derive"] }
-mls-rs-codec = { version = "0.5.0", path = "../mls-rs-codec", default-features = false}
+mls-rs-codec = { version = "0.5.2", path = "../mls-rs-codec", default-features = false}
 thiserror = { version = "1.0.40", optional = true }
 itertools = { version = "0.12.0", default-features = false, features = ["use_alloc"]}
 cfg-if = "1"
@@ -63,8 +63,8 @@ spin = { version = "0.9.8", default-features = false, features = ["mutex", "spin
 maybe-async = { version = "0.2.10" }
 
 # Optional dependencies
-mls-rs-provider-sqlite = { path = "../mls-rs-provider-sqlite", version = "0.10.0", default-features = false, optional = true }
-mls-rs-crypto-openssl = { path = "../mls-rs-crypto-openssl", optional = true, version = "0.8.0" }
+mls-rs-provider-sqlite = { path = "../mls-rs-provider-sqlite", version = "0.11.0", default-features = false, optional = true }
+mls-rs-crypto-openssl = { path = "../mls-rs-crypto-openssl", optional = true, version = "0.9.0" }
 # TODO: https://github.com/GoogleChromeLabs/wasm-bindgen-rayon
 rayon = { version = "1", optional = true }
 arbitrary = { version = "1", features = ["derive"], optional = true }
@@ -102,11 +102,11 @@ rand_core = { version = "0.6", default-features = false, features = ["alloc"] }
 
 [target.'cfg(target_arch = "wasm32")'.dev-dependencies]
 wasm-bindgen-test = { version = "0.3.26", default-features = false }
-mls-rs-crypto-webcrypto = { path = "../mls-rs-crypto-webcrypto", version = "0.3.0" }
+mls-rs-crypto-webcrypto = { path = "../mls-rs-crypto-webcrypto", version = "0.4.0" }
 criterion = { version = "0.5.1", default-features = false, features = ["plotters", "cargo_bench_support", "async_futures", "html_reports"] }
 
 [target.'cfg(not(target_arch = "wasm32"))'.dev-dependencies]
-mls-rs-crypto-openssl = { path = "../mls-rs-crypto-openssl", version = "0.8.0"}
+mls-rs-crypto-openssl = { path = "../mls-rs-crypto-openssl", version = "0.9.0"}
 criterion = { version = "0.5.1", features = ["async_futures", "html_reports"] }
 
 [[example]]
diff --git a/mls-rs/fuzz/Cargo.toml b/mls-rs/fuzz/Cargo.toml
index e536501c..4dbee21c 100644
--- a/mls-rs/fuzz/Cargo.toml
+++ b/mls-rs/fuzz/Cargo.toml
@@ -11,7 +11,7 @@ edition = "2021"
 cargo-fuzz = true
 
 [dependencies]
-mls-rs = { version = "0.38.0", path = "..", features = ["arbitrary", "fuzz_util"] }
+mls-rs = { version = "0.39.0", path = "..", features = ["arbitrary", "fuzz_util"] }
 futures = "0.3.25"
 libfuzzer-sys = "0.4"
 once_cell = "1.13.0"
diff --git a/mls-rs/test_harness_integration/Cargo.toml b/mls-rs/test_harness_integration/Cargo.toml
index a42e1a36..6877e9fe 100644
--- a/mls-rs/test_harness_integration/Cargo.toml
+++ b/mls-rs/test_harness_integration/Cargo.toml
@@ -6,7 +6,7 @@ edition = "2021"
 publish = false
 
 [dependencies]
-mls-rs = { version = "0.38.0", path = "..", default-features = false, features = ["std", "external_client", "state_update"]}
+mls-rs = { version = "0.39.0", path = "..", default-features = false, features = ["std", "external_client", "state_update"]}
 tonic = "0.10.2"
 prost = "0.12.1"
 tokio = { version = "1", features = ["macros", "rt-multi-thread"] }
@@ -25,10 +25,10 @@ by_ref_proposal = [ "mls-rs/by_ref_proposal" ]
 default = ["tree_index", "private_message", "prior_epoch", "out_of_order", "psk", "custom_proposal", "by_ref_proposal"]
 
 [target.'cfg(target_arch = "wasm32")'.dependencies]
-mls-rs-crypto-rustcrypto = { path = "../../mls-rs-crypto-rustcrypto", features = ["browser"], version = "0.9.0" }
+mls-rs-crypto-rustcrypto = { path = "../../mls-rs-crypto-rustcrypto", features = ["browser"], version = "0.10.0" }
 
 [target.'cfg(not(target_arch = "wasm32"))'.dependencies]
-mls-rs-crypto-openssl = { path = "../../mls-rs-crypto-openssl", version = "0.8.0"}
+mls-rs-crypto-openssl = { path = "../../mls-rs-crypto-openssl", version = "0.9.0"}
 
 [build-dependencies]
 tonic-build = "0.10.2"