diff --git a/src/gitlab_action/deploy.py b/src/gitlab_action/deploy.py
index 8b869252..21ff212b 100755
--- a/src/gitlab_action/deploy.py
+++ b/src/gitlab_action/deploy.py
@@ -9,6 +9,7 @@
 
 def deploy(dagster_cloud_yaml_file, deployment=None):
     url = os.environ["DAGSTER_CLOUD_URL"]
+    python_version = os.getenv("DAGSTER_PYTHON_VERSION", "3.8")
     if not os.getenv("SERVERLESS_BASE_IMAGE_PREFIX"):
         base_image_prefix = "657821118200.dkr.ecr.us-west-2.amazonaws.com/dagster-cloud-serverless-base-"
         if ".dogfood." in url:
@@ -39,6 +40,7 @@ def deploy(dagster_cloud_yaml_file, deployment=None):
                 f"--deps-cache-to={deps_cache}",
                 f"--commit-hash={commit}",
                 f"--git-url={commit_url}",
+                f"--python-version={python_version}",
             ]
             if deployment:
                 command_args.append(f"--url={url}/{deployment}")