diff --git a/frameworks/Ruby/sinatra/sinatra-postgres-iodine-mri.dockerfile b/frameworks/Ruby/sinatra/sinatra-postgres-iodine-mri.dockerfile
index a6a29633958..7dbd84dfeca 100644
--- a/frameworks/Ruby/sinatra/sinatra-postgres-iodine-mri.dockerfile
+++ b/frameworks/Ruby/sinatra/sinatra-postgres-iodine-mri.dockerfile
@@ -1,4 +1,4 @@
-FROM ruby:3.5-rc
+FROM ruby:4.0-rc
 
 ENV RUBY_YJIT_ENABLE=1
 
diff --git a/frameworks/Ruby/sinatra/sinatra-postgres.dockerfile b/frameworks/Ruby/sinatra/sinatra-postgres.dockerfile
index 5d16f620330..8481d4f93e7 100644
--- a/frameworks/Ruby/sinatra/sinatra-postgres.dockerfile
+++ b/frameworks/Ruby/sinatra/sinatra-postgres.dockerfile
@@ -1,4 +1,4 @@
-FROM ruby:3.5-rc
+FROM ruby:4.0-rc
 
 ENV RUBY_YJIT_ENABLE=1
 
diff --git a/frameworks/Ruby/sinatra/sinatra.dockerfile b/frameworks/Ruby/sinatra/sinatra.dockerfile
index 252f6743a01..10d5a0c9b2d 100644
--- a/frameworks/Ruby/sinatra/sinatra.dockerfile
+++ b/frameworks/Ruby/sinatra/sinatra.dockerfile
@@ -1,4 +1,4 @@
-FROM ruby:3.5-rc
+FROM ruby:4.0-rc
 
 ENV RUBY_YJIT_ENABLE=1