diff --git a/Dockerfile b/Dockerfile
index 3d6d4c57..b1ef6e25 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,8 +3,8 @@ FROM ubuntu:focal-20221130
 ARG VERSION=15.8.0
 
 ENV GITLAB_VERSION=${VERSION} \
-    RUBY_VERSION=3.0.5 \
-    RUBY_SOURCE_SHA256SUM="9afc6380a027a4fe1ae1a3e2eccb6b497b9c5ac0631c12ca56f9b7beb4848776" \
+    RUBY_VERSION=2.7.7 \
+    RUBY_SOURCE_SHA256SUM="e10127db691d7ff36402cfe88f418c8d025a3f1eea92044b162dd72f0b8c7b90" \
     GOLANG_VERSION=1.18.10 \
     GITLAB_SHELL_VERSION=14.15.0 \
     GITLAB_PAGES_VERSION=15.8.0 \