diff --git a/2.2/onbuild/Dockerfile b/2.2/onbuild/Dockerfile
index 1c90bfd92d..21ee9608b5 100644
--- a/2.2/onbuild/Dockerfile
+++ b/2.2/onbuild/Dockerfile
@@ -1,4 +1,4 @@
-FROM ruby:2.2
+FROM ruby:2.7.8
 
 # throw errors if Gemfile has been modified since Gemfile.lock
 RUN bundle config --global frozen 1