diff --git a/Dockerfile b/Dockerfile
index f2d75be..fc97092 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # This image is cached on the Github Actions VM, so it drastically reduces build time
-FROM jekyll/builder:latest
+FROM jekyll/builder:4.2.0
 USER root
 
 COPY entrypoint.sh /entrypoint.sh