diff --git a/Dockerfile.alpine b/Dockerfile.alpine
index 3c572c2f..9fa51b6d 100644
--- a/Dockerfile.alpine
+++ b/Dockerfile.alpine
@@ -1,7 +1,8 @@
 FROM ruby:2.7.3-alpine
 
 RUN apk update && apk add --no-cache \
-  git
+  git \
+  gcompat
 
 COPY . /src/gh/pages-gem