diff --git a/Dockerfile b/Dockerfile
index f05cf3a4..e2ff71fd 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,6 +4,7 @@
 FROM python:3-alpine as docs
 ADD . /usr/src/app/shaarli
 RUN cd /usr/src/app/shaarli \
+    && apk add --no-cache gcc musl-dev \
     && pip install --no-cache-dir mkdocs \
     && mkdocs build --clean