diff --git a/documentation/Dockerfile b/documentation/Dockerfile
index 8c8f47ed..562c6861 100644
--- a/documentation/Dockerfile
+++ b/documentation/Dockerfile
@@ -1,6 +1,6 @@
-FROM ubuntu:20.04
-RUN apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install -y python3-pil \
+FROM debian:bullseye-slim
+RUN apt-get update && apt-get install -y python3-pil \
     python3-pip texlive-fonts-recommended latexmk \
     texlive-latex-extra texlive-latex-recommended make php-cli composer \
-    nodejs npm libgbm1 libasound2
-
+    nodejs npm libgbm1 libasound2 \
+    && rm -rf /var/lib/apt/lists/*