diff --git a/Dockerfile b/Dockerfile
index e9c0d5c..fd9c004 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -28,6 +28,7 @@ RUN flit install --pth-file
 # switch back to root to remove header files
 USER root
 RUN apk delete python3-dev
+RUN apk delete libc-dev
 RUN apk delete libffi-dev
 RUN apk delete openssl-dev