diff --git a/.changes/1.26.99.json b/.changes/1.26.99.json
new file mode 100644
index 0000000000..44c13c76db
--- /dev/null
+++ b/.changes/1.26.99.json
@@ -0,0 +1,17 @@
+[
+  {
+    "category": "``cloudwatch``",
+    "description": "[``botocore``] Update cloudwatch client to latest version",
+    "type": "api-change"
+  },
+  {
+    "category": "``comprehend``",
+    "description": "[``botocore``] This release adds a new field (FlywheelArn) to the EntitiesDetectionJobProperties object. The FlywheelArn field is returned in the DescribeEntitiesDetectionJob and ListEntitiesDetectionJobs responses when the EntitiesDetection job is started with a FlywheelArn instead of an EntityRecognizerArn .",
+    "type": "api-change"
+  },
+  {
+    "category": "``rds``",
+    "description": "[``botocore``] Added error code CreateCustomDBEngineVersionFault for when the create custom engine version for Custom engines fails.",
+    "type": "api-change"
+  }
+]
\ No newline at end of file
diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 2b3401565c..961974996b 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -2,6 +2,14 @@
 CHANGELOG
 =========
 
+1.26.99
+=======
+
+* api-change:``cloudwatch``: [``botocore``] Update cloudwatch client to latest version
+* api-change:``comprehend``: [``botocore``] This release adds a new field (FlywheelArn) to the EntitiesDetectionJobProperties object. The FlywheelArn field is returned in the DescribeEntitiesDetectionJob and ListEntitiesDetectionJobs responses when the EntitiesDetection job is started with a FlywheelArn instead of an EntityRecognizerArn .
+* api-change:``rds``: [``botocore``] Added error code CreateCustomDBEngineVersionFault for when the create custom engine version for Custom engines fails.
+
+
 1.26.98
 =======
 
diff --git a/boto3/__init__.py b/boto3/__init__.py
index 5974543bb5..5def881b97 100644
--- a/boto3/__init__.py
+++ b/boto3/__init__.py
@@ -17,7 +17,7 @@
 from boto3.session import Session
 
 __author__ = 'Amazon Web Services'
-__version__ = '1.26.98'
+__version__ = '1.26.99'
 
 
 # The default Boto3 session; autoloaded when needed.
diff --git a/setup.cfg b/setup.cfg
index 92772a0bb0..87004d5bcd 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -3,7 +3,7 @@ universal = 0
 
 [metadata]
 requires_dist =
-    botocore>=1.29.98,<1.30.0
+    botocore>=1.29.99,<1.30.0
     jmespath>=0.7.1,<2.0.0
     s3transfer>=0.6.0,<0.7.0
 
diff --git a/setup.py b/setup.py
index f682da80c6..d9b7765bf6 100644
--- a/setup.py
+++ b/setup.py
@@ -13,7 +13,7 @@
 
 
 requires = [
-    'botocore>=1.29.98,<1.30.0',
+    'botocore>=1.29.99,<1.30.0',
     'jmespath>=0.7.1,<2.0.0',
     's3transfer>=0.6.0,<0.7.0',
 ]