diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6396ca75..6d9502a9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,17 @@
 # Changelog
 
+## [1.18.1] - 2026-07-17
+
+### Fixed
+- fix: tighten package specifier validation in install_packages() (#581) (3c4b4ee)
+
+### Other Changes
+- chore(deps): bump python-multipart from 0.0.27 to 0.0.31 (#527) (986801f)
+- chore(deps): bump soupsieve from 2.8 to 2.8.4 (#575) (1a79821)
+- chore(deps): bump cryptography from 46.0.7 to 48.0.1 (#531) (3a4361e)
+- chore(deps): bump pyjwt from 2.12.0 to 2.13.0 (#525) (8e1abcf)
+- chore(deps): bump starlette from 0.49.1 to 1.3.1 (#530) (738eb0f)
+
 ## [1.18.0] - 2026-07-10
 
 ### Fixed
diff --git a/pyproject.toml b/pyproject.toml
index 547852aa..d430d87e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "bedrock-agentcore"
-version = "1.18.0"
+version = "1.18.1"
 description = "An SDK for using Bedrock AgentCore"
 readme = "README.md"
 requires-python = ">=3.10"
diff --git a/uv.lock b/uv.lock
index 215b2ef4..1bd84534 100644
--- a/uv.lock
+++ b/uv.lock
@@ -50,7 +50,7 @@ resolution-markers = [
     "python_full_version < '3.11'",
 ]
 dependencies = [
-    { name = "caio", marker = "python_full_version < '3.11'" },
+    { name = "caio" },
 ]
 sdist = { url = "https://files.pythonhosted.org/packages/67/e2/d7cb819de8df6b5c1968a2756c3cb4122d4fa2b8fc768b53b7c9e5edb646/aiofile-3.9.0.tar.gz", hash = "sha256:e5ad718bb148b265b6df1b3752c4d1d83024b93da9bd599df74b9d9ffcf7919b", size = 17943, upload-time = "2024-10-08T10:39:35.846Z" }
 wheels = [
@@ -66,7 +66,7 @@ resolution-markers = [
     "python_full_version >= '3.11' and python_full_version < '3.13'",
 ]
 dependencies = [
-    { name = "caio", marker = "python_full_version >= '3.11'" },
+    { name = "caio" },
 ]
 sdist = { url = "https://files.pythonhosted.org/packages/48/41/2fea7e193e061ce54eacc3b7bc0e6a99e4fcff43c78cf0a76dd781ed8334/aiofile-3.11.1.tar.gz", hash = "sha256:1f91912c6643d2a4e49ca4ae3514f0bf3867ce948a36d99a6411b8f4755f4cf9", size = 19342, upload-time = "2026-05-16T08:18:33.538Z" }
 wheels = [
@@ -374,7 +374,7 @@ wheels = [
 
 [[package]]
 name = "bedrock-agentcore"
-version = "1.18.0"
+version = "1.18.1"
 source = { editable = "." }
 dependencies = [
     { name = "boto3" },