diff --git a/Dockerfile b/Dockerfile
index 9abcc95..0491bb9 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,7 +3,7 @@ FROM python:3.7-alpine
 RUN apk add git
 
 RUN apk add --no-cache --virtual .build-deps \
-        gcc \
+        gcc musl-dev \
     && pip install snakeoil \
     && apk del .build-deps