diff --git a/Cargo.toml b/Cargo.toml
index 5e8144d..33ca39a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -19,7 +19,7 @@ rust-version = "1.70"
 # We include `/tests/lib.rs` to squash a `cargo package` warning that the
 # `integration` test target is being ignored. We don't include anything else
 # so tests obviously won't work, but it makes `cargo package` quiet.
-include = ["/src/**/*.rs", "/tests/lib.rs", "/*.md"]
+include = ["/src/**/*.rs", "/tests/lib.rs", "/*.md", "LICENSE-MIT", "UNLICENSE"]
 
 [workspace]
 members = [
diff --git a/jiff-tzdb-platform/Cargo.toml b/jiff-tzdb-platform/Cargo.toml
index 99e766b..c6c8c2e 100644
--- a/jiff-tzdb-platform/Cargo.toml
+++ b/jiff-tzdb-platform/Cargo.toml
@@ -14,7 +14,7 @@ keywords = ["date", "time", "temporal", "zone", "iana"]
 workspace = ".."
 edition = "2021"
 rust-version = "1.70"
-include = ["/*.rs"]
+include = ["/*.rs", "LICENSE-MIT", "UNLICENSE"]
 
 [lib]
 name = "jiff_tzdb_platform"
diff --git a/jiff-tzdb/Cargo.toml b/jiff-tzdb/Cargo.toml
index dde2e1d..73843e8 100644
--- a/jiff-tzdb/Cargo.toml
+++ b/jiff-tzdb/Cargo.toml
@@ -12,7 +12,7 @@ keywords = ["date", "time", "temporal", "zone", "iana"]
 workspace = ".."
 edition = "2021"
 rust-version = "1.70"
-include = ["/*.rs", "/*.dat"]
+include = ["/*.rs", "/*.dat", "LICENSE-MIT", "UNLICENSE"]
 
 [lib]
 name = "jiff_tzdb"