diff --git a/Dockerfile b/Dockerfile
index e08ba76..aca898d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # Separate build image
-FROM python:3.9-slim-buster as compile-image
+FROM python:3.9-slim-bullseye as compile-image
 RUN python -m venv /opt/venv
 ENV PATH="/opt/venv/bin:$PATH"
 COPY requirements.txt .
@@ -7,7 +7,7 @@ RUN pip install --no-cache-dir --upgrade pip \
  && pip install --no-cache-dir -r requirements.txt
 
 # Final image
-FROM python:3.9-slim-buster
+FROM python:3.9-slim-bullseye
 COPY --from=compile-image /opt/venv /opt/venv
 ENV PATH="/opt/venv/bin:$PATH"
 WORKDIR /app