diff --git a/renovate.Dockerfile b/renovate.Dockerfile
index 257fd09..f2e25c4 100644
--- a/renovate.Dockerfile
+++ b/renovate.Dockerfile
@@ -12,7 +12,7 @@ ENV RUBY_VERSION=3.0.6
 
 # EOL: 2025-03-31
 # renovate: datasource=ruby-version depName=ruby versioning=ruby
-ENV RUBY_VERSION=3.1.4
+ENV RUBY_VERSION=3.1.5
 
 # EOL: 2026-03-31
 # renovate: datasource=ruby-version depName=ruby versioning=ruby