diff --git a/recipe/meta.yaml b/recipe/meta.yaml
index 7eaac981..c6213ccd 100644
--- a/recipe/meta.yaml
+++ b/recipe/meta.yaml
@@ -1,4 +1,4 @@
-{% set version = "2.9.0" %}
+{% set version = "2.9.1" %}
 
 package:
   name: ray-packages
@@ -6,13 +6,15 @@ package:
 
 source:
   url: https://github.com/ray-project/ray/archive/ray-{{ version }}.tar.gz
-  sha256: bebe4413dd1a856cd854308d76d14fb412727b6228bfbdea5f3b5a45ef3f5acc
+  sha256: e28fbe0f9aa918b394426a68e96b440fafe653b270c3dfab84a4d3680d05f550
   patches:
     - patches/0001-patch-redis-for-ar-ranlib.patch
     - patches/0002-Disable-making-entry-scripts.patch
     - patches/0003-Ignore-warnings-in-event.cc-and-logging.cc.patch
     - patches/0004-Remove-all-dependencies-from-setup.py.patch
-    - patches/0005-ci-remove-boost-as-a-dependency-42226.patch
+    # See https://github.com/conda-forge/ray-packages-feedstock/issues/136
+    # Keep in sync with current or active migration of libgrpc to avoid
+    # ABI breakage
     - patches/0006-Vendor-grpc-1.59.3.patch
     # This patch applies grpc tag v1.59.3 changes from
     # https://github.com/grpc/grpc/blob/35df344f5e17a9cb290ebf0f5b0f03ddb1ff0a97/bazel/grpc_deps.bzl#L243
@@ -21,7 +23,7 @@ source:
     # xref https://github.com/ray-project/ray/issues/42560
 
 build:
-  number: 2
+  number: 0
   skip: true  # [win]
 
 # Need these up here for conda-smithy to handle them properly.
diff --git a/recipe/patches/0004-Remove-all-dependencies-from-setup.py.patch b/recipe/patches/0004-Remove-all-dependencies-from-setup.py.patch
index 1b786c97..9e759b92 100644
--- a/recipe/patches/0004-Remove-all-dependencies-from-setup.py.patch
+++ b/recipe/patches/0004-Remove-all-dependencies-from-setup.py.patch
@@ -44,7 +44,7 @@ index 4d2fbbd19b..0aa524af1b 100644
 -            "pydantic!=2.0.*,!=2.1.*,!=2.2.*,!=2.3.*,!=2.4.*,<3",
 -            "prometheus_client >= 0.7.1",
 -            "smart_open",
--            "virtualenv >=20.0.24, < 20.21.1",  # For pip runtime env.
+-            "virtualenv >=20.0.24, !=20.21.1",  # For pip runtime env.
 -        ],
 -        "client": [
 -            # The Ray client needs a specific range of gRPC to work:
diff --git a/recipe/patches/0005-ci-remove-boost-as-a-dependency-42226.patch b/recipe/patches/0005-ci-remove-boost-as-a-dependency-42226.patch
deleted file mode 100644
index 5e4a0dec..00000000
--- a/recipe/patches/0005-ci-remove-boost-as-a-dependency-42226.patch
+++ /dev/null
@@ -1,35 +0,0 @@
-From 560ff4201ceec40e5b9921b6d1baacfba656e42a Mon Sep 17 00:00:00 2001
-From: Cuong Nguyen <128072568+can-anyscale@users.noreply.github.com>
-Date: Mon, 8 Jan 2024 08:07:59 -0800
-Subject: [PATCH] [ci] remove boost as a dependency (#42226)
-
-The current boost rule is busted in master branch: https://buildkite.com/ray-project/postmerge/builds/2404#018ce49f-f8c1-4518-9d32-868a5a4decc6/176-281. Historically, we need to separate the boost rule from com_github_nelhage_rules_boost since we need a patch. This is no longer the case since #32550.
-
-Signed-off-by: can <can@anyscale.com>
----
- bazel/ray_deps_setup.bzl | 9 ---------
- 1 file changed, 9 deletions(-)
-
-diff --git a/bazel/ray_deps_setup.bzl b/bazel/ray_deps_setup.bzl
-index c406ba9281..f91eb303c4 100644
---- a/bazel/ray_deps_setup.bzl
-+++ b/bazel/ray_deps_setup.bzl
-@@ -159,15 +159,6 @@ def ray_deps_setup():
-         sha256 = "97e70364e9249702246c0e9444bccdc4b847bed1eb03c5a3ece4f83dfe6abc44",
-     )
- 
--    auto_http_archive(
--        # This rule is used by @com_github_nelhage_rules_boost and
--        # declaring it here allows us to avoid patching the latter.
--        name = "boost",
--        build_file = "@com_github_nelhage_rules_boost//:BUILD.boost",
--        sha256 = "71feeed900fbccca04a3b4f2f84a7c217186f28a940ed8b7ed4725986baf99fa",
--        url = "https://boostorg.jfrog.io/artifactory/main/release/1.81.0/source/boost_1_81_0.tar.bz2",
--    )
--
-     auto_http_archive(
-         name = "com_github_nelhage_rules_boost",
-         # If you update the Boost version, remember to update the 'boost' rule.
--- 
-2.34.1
-