diff --git a/actions/build_deploy_python_executable/action.yml b/actions/build_deploy_python_executable/action.yml
index 5fe88957..418f84d7 100644
--- a/actions/build_deploy_python_executable/action.yml
+++ b/actions/build_deploy_python_executable/action.yml
@@ -5,9 +5,9 @@ inputs:
     description: 'Path to dagster_cloud.yaml'
     required: true
   python_version:
-    description: 'Python version string, major.minor only, eg "3.8"'
+    description: 'Python version string, major.minor only, eg "3.11"'
     required: false
-    default: '3.8'
+    default: '3.11'
   deployment:
     required: false
     description: "The deployment to push to, defaults to 'prod'. Ignored for pull requests where the branch deployment is used."
@@ -47,12 +47,12 @@ runs:
       run: echo "FLAG_DEPS_CACHE_TO=--deps-cache-to=${{ github.repository }}/${{ github.ref_name }}" >> $GITHUB_ENV
       shell: bash
 
-    - name: Set up Python 3.8
+    - name: Set up Python 3.11
       uses: actions/setup-python@v4
       with:
-        python-version: "3.8"
+        python-version: "3.11"
 
-    - if: ${{ inputs.python_version != '3.8' }}
+    - if: ${{ inputs.python_version != '3.11' }}
       name: Set up Python ${{ inputs.python_version }} for target
       uses: actions/setup-python@v4
       with:
diff --git a/gitlab/serverless-legacy-ci.yml b/gitlab/serverless-legacy-ci.yml
index 7746391d..b379079a 100644
--- a/gitlab/serverless-legacy-ci.yml
+++ b/gitlab/serverless-legacy-ci.yml
@@ -40,7 +40,7 @@ build-image:
   before_script:
     - echo $AWS_ECR_PASSWORD | docker login --username $AWS_ECR_USERNAME --password-stdin $REGISTRY_URL
   script:
-    - echo "FROM python:3.8-slim" > $DAGSTER_CLOUD_LOCATION_DIR/Dockerfile
+    - echo "FROM python:3.11-slim" > $DAGSTER_CLOUD_LOCATION_DIR/Dockerfile
     - cat Dockerfile.template >> $DAGSTER_CLOUD_LOCATION_DIR/Dockerfile
     - docker build $DAGSTER_CLOUD_LOCATION_DIR -t $REGISTRY_URL:prod-$DAGSTER_CLOUD_LOCATION_NAME-$CI_COMMIT_SHA
     - docker push $REGISTRY_URL:prod-$DAGSTER_CLOUD_LOCATION_NAME-$CI_COMMIT_SHA
diff --git a/sample-repo/Dockerfile b/sample-repo/Dockerfile
index 6eafdad5..3a491f7b 100644
--- a/sample-repo/Dockerfile
+++ b/sample-repo/Dockerfile
@@ -1,8 +1,8 @@
-FROM python:3.8-slim
+FROM python:3.11-slim
 
 COPY requirements.txt /requirements.txt
 RUN pip install -r /requirements.txt
 
 WORKDIR /opt/dagster/app
 
-COPY repo.py /opt/dagster/app
\ No newline at end of file
+COPY repo.py /opt/dagster/app
diff --git a/src/Dockerfile b/src/Dockerfile
index 6dd807cb..a7fda74c 100644
--- a/src/Dockerfile
+++ b/src/Dockerfile
@@ -1,4 +1,4 @@
-FROM --platform=linux/amd64 python:3.8.16-slim
+FROM --platform=linux/amd64 python:3.11-slim
 
 # Install deps
 RUN apt update && apt install git -y
@@ -34,4 +34,4 @@ COPY src/get_branch_deployment.sh /get_branch_deployment.sh
 COPY src/gitlab_action gitlab_action
 
 # Use the venv python as the command
-CMD venv-dagster-cloud/bin/python3
\ No newline at end of file
+CMD venv-dagster-cloud/bin/python3
diff --git a/src/Dockerfile.template b/src/Dockerfile.template
index 9346fc3b..f045a873 100644
--- a/src/Dockerfile.template
+++ b/src/Dockerfile.template
@@ -1,5 +1,5 @@
 
-# base image is templated in (default: python:3.8-slim)
+# base image is templated in (default: python:3.11-slim)
 
 # Run the custom dagster cloud pre install script if available
 COPY *dagster_cloud_pre_install.sh *setup.py *requirements.txt /
diff --git a/src/copy_template.sh b/src/copy_template.sh
index e8583bd5..04042976 100755
--- a/src/copy_template.sh
+++ b/src/copy_template.sh
@@ -2,9 +2,9 @@
 
 if [ -z $CUSTOM_BASE_IMAGE_ALLOWED ] || [ -z $INPUT_BASE_IMAGE ]; then
     if [ ! -z $INPUT_BASE_IMAGE ]; then
-        echo "Custom base images are not enabled for this organization, defaulting to python:3.8-slim."
+        echo "Custom base images are not enabled for this organization, defaulting to python:3.11-slim."
     fi
-    echo "FROM python:3.8-slim" > ${INPUT_TARGET_DIRECTORY}/Dockerfile
+    echo "FROM python:3.11-slim" > ${INPUT_TARGET_DIRECTORY}/Dockerfile
 else
     echo "FROM ${INPUT_BASE_IMAGE}" > ${INPUT_TARGET_DIRECTORY}/Dockerfile
 fi