diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7c3d54c..d0ba390 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -26,7 +26,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-python@v2
         with:
-          python-version: 3.9
+          python-version: "3.9"
       - name: Pip cache
         uses: actions/cache@v2
         with:
diff --git a/Dockerfile b/Dockerfile
index f636417..8f4e077 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -13,8 +13,8 @@ ENV PYTHONDONTWRITEBYTECODE 1
 ENV PATH="/app/venv/bin:$PATH"
 
 # Pinned versions
-ENV PIP_PIP_VERSION 21.2.4
-ENV PIP_PIP_TOOLS_VERSION 6.2.0
+ENV PIP_PIP_VERSION 21.3.1
+ENV PIP_PIP_TOOLS_VERSION 6.4.0
 
 # Setup virtualenv
 RUN python -m venv /app/venv