diff --git a/awsbatch-cli/CHANGELOG.md b/awsbatch-cli/CHANGELOG.md
index a17f35735c..2caa6363db 100644
--- a/awsbatch-cli/CHANGELOG.md
+++ b/awsbatch-cli/CHANGELOG.md
@@ -1,6 +1,20 @@
 CHANGELOG
 =========
 
+1.2.0
+------
+
+**CHANGES**
+
+- Add support for Python 3.10.
+
+1.1.0
+------
+
+**CHANGES**
+
+- Remove support for Python 3.6.
+
 1.0.0
 ------
 
diff --git a/awsbatch-cli/setup.py b/awsbatch-cli/setup.py
index f3078cecfe..892bb6a1cc 100644
--- a/awsbatch-cli/setup.py
+++ b/awsbatch-cli/setup.py
@@ -67,6 +67,7 @@ def readme():
         "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
+        "Programming Language :: Python :: 3.10",
         "Topic :: Scientific/Engineering",
         "License :: OSI Approved :: Apache Software License",
     ],
diff --git a/cli/requirements.txt b/cli/requirements.txt
index ad1a97a199..6a75cdcde7 100644
--- a/cli/requirements.txt
+++ b/cli/requirements.txt
@@ -2,7 +2,7 @@ boto3>=1.16.14
 tabulate>=0.8.8,<=0.8.10
 PyYAML~=5.3
 jinja2~=3.0
-marshmallow~=3.10
+marshmallow~=3.19
 aws-cdk.core~=1.137
 aws-cdk.aws-batch~=1.137
 aws_cdk.aws-cloudwatch~=1.137