diff --git a/modules/openapi-generator/src/main/resources/ruby-on-rails-server/Dockerfile b/modules/openapi-generator/src/main/resources/ruby-on-rails-server/Dockerfile
index d53cf3aacd07..735fb8af5ee5 100644
--- a/modules/openapi-generator/src/main/resources/ruby-on-rails-server/Dockerfile
+++ b/modules/openapi-generator/src/main/resources/ruby-on-rails-server/Dockerfile
@@ -1,4 +1,4 @@
-FROM ruby:2.5-alpine
+FROM ruby:2.6-alpine
 
 ENV BUILD_PACKAGES="curl-dev ruby-dev build-base" \
     DEV_PACKAGES="zlib-dev libxml2-dev libxslt-dev tzdata yaml-dev sqlite-dev" \