diff --git a/.github/workflows/test-and-publish.yml b/.github/workflows/test-and-publish.yml
index 1664bbb..db1b5f6 100644
--- a/.github/workflows/test-and-publish.yml
+++ b/.github/workflows/test-and-publish.yml
@@ -12,9 +12,9 @@ jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9 # v3
       - name: setup Python
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@61a6322f88396a6271a6ee3565807d608ecaddd1 # v4
         with:
           python-version: "3.8"
       - name: install
@@ -31,9 +31,9 @@ jobs:
     needs: test
     if: success() && github.event_name == 'push' && startsWith(github.ref, 'refs/tags')
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9 # v3
       - name: setup Python
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@61a6322f88396a6271a6ee3565807d608ecaddd1 # v4
         with:
           python-version: "3.8"
       - name: install
@@ -44,12 +44,12 @@ jobs:
       - name: build package
         run: python setup.py bdist_wheel
       - name: publish package
-        uses: pypa/gh-action-pypi-publish@v1.4.2
+        uses: pypa/gh-action-pypi-publish@b7f401de30cb6434a1e19f805ff006643653240e # v1.8.10
         with:
           user: __token__
           password: ${{ secrets.PYPI_API_TOKEN }}
       - name: create Release
-        uses: actions/create-release@v1
+        uses: actions/create-release@0cb9c9b65d5d1901c1f53e5e66eaf4afd303e70e # v1
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         with:
@@ -62,9 +62,9 @@ jobs:
     needs: test
     name: Build and push Docker image
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9 # v3
       - name: Login to GitHub Container Registry
-        uses: docker/login-action@v1
+        uses: docker/login-action@465a07811f14bebb1938fbed4728c6a1ff8901fc # v2
         with:
           registry: ghcr.io
           username: ${{ github.repository_owner }}
diff --git a/Dockerfile b/Dockerfile
index eceee5c..0164d3a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.8-alpine
+FROM python:3.11-alpine@sha256:603975e62d85aa07578034d3d10ffa1983b7618a6abb6371cf51941be6b8842c
 LABEL org.opencontainers.image.source https://github.com/brennerm/aws-quota-checker
 WORKDIR /app
 ADD setup.py /app