diff --git a/release-a-library/Dockerfile b/release-a-library/Dockerfile
index 83aea0c..4f6a79d 100644
--- a/release-a-library/Dockerfile
+++ b/release-a-library/Dockerfile
@@ -1,7 +1,7 @@
 ARG FROM_TAG=release-alpine
 FROM ghcr.io/ponylang/changelog-tool:release AS changelog-tool
 
-FROM ponylang/ponyc:${FROM_TAG}
+FROM ghcr.io/ponylang/ponyc:${FROM_TAG}
 
 COPY --from=changelog-tool /usr/local/bin/changelog-tool /usr/local/bin/changelog-tool
 
diff --git a/x86-64-unknown-linux-builder/Dockerfile b/x86-64-unknown-linux-builder/Dockerfile
index 396d210..fa5bbec 100644
--- a/x86-64-unknown-linux-builder/Dockerfile
+++ b/x86-64-unknown-linux-builder/Dockerfile
@@ -1,5 +1,5 @@
 ARG FROM_TAG=release-alpine
-FROM ponylang/ponyc:${FROM_TAG}
+FROM ghcr.io/ponylang/ponyc:${FROM_TAG}
 
 RUN apk add --update --no-cache \
   alpine-sdk \