diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e48473e..016225b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -17,14 +17,9 @@ jobs:
   test:
     runs-on: ubuntu-latest
     container:
-      image: python:3.9-slim
+      image: cimg/python:3.9
     steps:
       - uses: actions/checkout@v4
-      - name: Install dependencies
-        run: |
-          apt-get update && apt-get install -y curl && \
-          curl -sSL https://install.python-poetry.org | python3 - && \
-          ln -s /github/home/.local/bin/poetry /usr/local/bin/poetry
       - name: Configure Poetry
         run: poetry config virtualenvs.create false && poetry install
       - name: Run tests
diff --git a/Dockerfile b/Dockerfile
index 6f83206..998b1d4 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,9 +1,4 @@
-FROM python:3.9-slim
-
-# Install Poetry
-RUN apt-get update && apt-get install -y curl && \
-    curl -sSL https://install.python-poetry.org | python3 - && \
-    ln -s /root/.local/bin/poetry /usr/local/bin/poetry
+FROM cimg/python:3.9
 
 # Set working directory
 WORKDIR /app