diff --git a/.ruby-version b/.ruby-version
index ef538c28..fa7adc7a 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-3.1.2
+3.3.5
diff --git a/Dockerfile b/Dockerfile
index 00ea8b5f..08927943 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 
-FROM ruby:3.1.2-alpine@sha256:05b990dbaa3a118f96e9ddbf046f388b3c4953d5ef3d18908af96f42c0e138d9
+FROM ruby:3.3.5-alpine@sha256:b4c321a99b9f21b7bb24f22e558bf1477630fb55d692aba4e25b2fe5deb7eaf1
 
 ARG BUILD_HASH='unknown'
 ENV BUILD_HASH=$BUILD_HASH