diff --git a/.ruby-version b/.ruby-version
index be94e6f53..fa7adc7ac 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-3.2.2
+3.3.5
diff --git a/Dockerfile b/Dockerfile
index c43ecb67e..66d2d049d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM ruby:3.2.2-slim@sha256:70370316b02901d7db3f6e453d6259ed4d0d52326d6ac57e3a579f7e3b616e41
+FROM ruby:3.3.5-slim@sha256:fd90cb9f24cda928242d26be8ce6170f9bff0e3081fa590e374b4a53df8bc135
 
 # Add build-essential tools.
 RUN apt-get update -qq && \