diff --git a/.changes/1.34.21.json b/.changes/1.34.21.json
new file mode 100644
index 000000000000..53907cc5739c
--- /dev/null
+++ b/.changes/1.34.21.json
@@ -0,0 +1,32 @@
+[
+  {
+    "category": "``codebuild``",
+    "description": "GitLab Enhancements - Add support for Self-Hosted GitLab runners in CodeBuild. Add group webhooks",
+    "type": "api-change"
+  },
+  {
+    "category": "``ecr``",
+    "description": "The `DescribeImageScanning` API now includes `fixAvailable`, `exploitAvailable`, and `fixedInVersion` fields to provide more detailed information about the availability of fixes, exploits, and fixed versions for identified image vulnerabilities.",
+    "type": "api-change"
+  },
+  {
+    "category": "``ecs``",
+    "description": "This is a documentation only release to address various tickets.",
+    "type": "api-change"
+  },
+  {
+    "category": "``lambda``",
+    "description": "Support for JSON resource-based policies and block public access",
+    "type": "api-change"
+  },
+  {
+    "category": "``rds``",
+    "description": "Updates Amazon RDS documentation with configuration information about the BYOL model for RDS for Db2.",
+    "type": "api-change"
+  },
+  {
+    "category": "``ssm``",
+    "description": "Support for additional levels of cross-account, cross-Region organizational units in Automation. Various documentation updates.",
+    "type": "api-change"
+  }
+]
\ No newline at end of file
diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 2e730a2d2323..14ce73134667 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -2,6 +2,17 @@
 CHANGELOG
 =========
 
+1.34.21
+=======
+
+* api-change:``codebuild``: GitLab Enhancements - Add support for Self-Hosted GitLab runners in CodeBuild. Add group webhooks
+* api-change:``ecr``: The `DescribeImageScanning` API now includes `fixAvailable`, `exploitAvailable`, and `fixedInVersion` fields to provide more detailed information about the availability of fixes, exploits, and fixed versions for identified image vulnerabilities.
+* api-change:``ecs``: This is a documentation only release to address various tickets.
+* api-change:``lambda``: Support for JSON resource-based policies and block public access
+* api-change:``rds``: Updates Amazon RDS documentation with configuration information about the BYOL model for RDS for Db2.
+* api-change:``ssm``: Support for additional levels of cross-account, cross-Region organizational units in Automation. Various documentation updates.
+
+
 1.34.20
 =======
 
diff --git a/awscli/__init__.py b/awscli/__init__.py
index 2800d13fff65..1442860104b7 100644
--- a/awscli/__init__.py
+++ b/awscli/__init__.py
@@ -18,7 +18,7 @@
 
 import os
 
-__version__ = '1.34.20'
+__version__ = '1.34.21'
 
 #
 # Get our data path to be added to botocore's search path
diff --git a/doc/source/conf.py b/doc/source/conf.py
index 273a8fb5d3b5..b77b2c6afaf2 100644
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -52,7 +52,7 @@
 # The short X.Y version.
 version = '1.34.'
 # The full version, including alpha/beta/rc tags.
-release = '1.34.20'
+release = '1.34.21'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
diff --git a/setup.cfg b/setup.cfg
index 67576a344cf7..9640602ff638 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -3,7 +3,7 @@ universal = 0
 
 [metadata]
 requires_dist =
-        botocore==1.35.20
+        botocore==1.35.21
         docutils>=0.10,<0.17
         s3transfer>=0.10.0,<0.11.0
         PyYAML>=3.10,<6.1
diff --git a/setup.py b/setup.py
index 068ef06e7ece..6cdcb3f0bd74 100644
--- a/setup.py
+++ b/setup.py
@@ -24,7 +24,7 @@ def find_version(*file_paths):
 
 
 install_requires = [
-    'botocore==1.35.20',
+    'botocore==1.35.21',
     'docutils>=0.10,<0.17',
     's3transfer>=0.10.0,<0.11.0',
     'PyYAML>=3.10,<6.1',