diff --git a/CHANGELOG.md b/CHANGELOG.md
index fe5f5053..af1a1e7c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 # Changelog
 
+## [1.6.3] - 2026-04-16
+
+### Fixed
+- fix: validate region parameter to prevent SSRF request redirection (#417) (640b3ad)
+
 ## [1.6.2] - 2026-04-13
 
 ### Fixed
diff --git a/pyproject.toml b/pyproject.toml
index be45606a..7ed78e7e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "bedrock-agentcore"
-version = "1.6.2"
+version = "1.6.3"
 description = "An SDK for using Bedrock AgentCore"
 readme = "README.md"
 requires-python = ">=3.10"
diff --git a/uv.lock b/uv.lock
index 04923572..771e7f13 100644
--- a/uv.lock
+++ b/uv.lock
@@ -270,7 +270,7 @@ wheels = [
 
 [[package]]
 name = "bedrock-agentcore"
-version = "1.6.2"
+version = "1.6.3"
 source = { editable = "." }
 dependencies = [
     { name = "boto3" },