diff --git a/.changes/1.28.21.json b/.changes/1.28.21.json
new file mode 100644
index 0000000000..ba5551cfa3
--- /dev/null
+++ b/.changes/1.28.21.json
@@ -0,0 +1,27 @@
+[
+  {
+    "category": "``detective``",
+    "description": "[``botocore``] Updated the email validation regex to be in line with the TLD name specifications.",
+    "type": "api-change"
+  },
+  {
+    "category": "``ivs-realtime``",
+    "description": "[``botocore``] Add QUOTA_EXCEEDED and PUBLISHER_NOT_FOUND to EventErrorCode for stage health events.",
+    "type": "api-change"
+  },
+  {
+    "category": "``kinesis-video-archived-media``",
+    "description": "[``botocore``] This release enables minimum of Images SamplingInterval to be as low as 200 milliseconds in Kinesis Video Stream Image feature.",
+    "type": "api-change"
+  },
+  {
+    "category": "``kinesisvideo``",
+    "description": "[``botocore``] This release enables minimum of Images SamplingInterval to be as low as 200 milliseconds in Kinesis Video Stream Image feature.",
+    "type": "api-change"
+  },
+  {
+    "category": "``rekognition``",
+    "description": "[``botocore``] This release adds code snippets for Amazon Rekognition Custom Labels.",
+    "type": "api-change"
+  }
+]
\ No newline at end of file
diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index ebf6e09362..dfb6968c7a 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -2,6 +2,16 @@
 CHANGELOG
 =========
 
+1.28.21
+=======
+
+* api-change:``detective``: [``botocore``] Updated the email validation regex to be in line with the TLD name specifications.
+* api-change:``ivs-realtime``: [``botocore``] Add QUOTA_EXCEEDED and PUBLISHER_NOT_FOUND to EventErrorCode for stage health events.
+* api-change:``kinesis-video-archived-media``: [``botocore``] This release enables minimum of Images SamplingInterval to be as low as 200 milliseconds in Kinesis Video Stream Image feature.
+* api-change:``kinesisvideo``: [``botocore``] This release enables minimum of Images SamplingInterval to be as low as 200 milliseconds in Kinesis Video Stream Image feature.
+* api-change:``rekognition``: [``botocore``] This release adds code snippets for Amazon Rekognition Custom Labels.
+
+
 1.28.20
 =======
 
diff --git a/boto3/__init__.py b/boto3/__init__.py
index 7d71df842d..efe3853ee6 100644
--- a/boto3/__init__.py
+++ b/boto3/__init__.py
@@ -17,7 +17,7 @@
 from boto3.session import Session
 
 __author__ = 'Amazon Web Services'
-__version__ = '1.28.20'
+__version__ = '1.28.21'
 
 
 # The default Boto3 session; autoloaded when needed.
diff --git a/setup.cfg b/setup.cfg
index bad9387cba..1384564c17 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -3,7 +3,7 @@ universal = 0
 
 [metadata]
 requires_dist =
-    botocore>=1.31.20,<1.32.0
+    botocore>=1.31.21,<1.32.0
     jmespath>=0.7.1,<2.0.0
     s3transfer>=0.6.0,<0.7.0
 
diff --git a/setup.py b/setup.py
index c2b72b881c..b11efd6d21 100644
--- a/setup.py
+++ b/setup.py
@@ -13,7 +13,7 @@
 
 
 requires = [
-    'botocore>=1.31.20,<1.32.0',
+    'botocore>=1.31.21,<1.32.0',
     'jmespath>=0.7.1,<2.0.0',
     's3transfer>=0.6.0,<0.7.0',
 ]