diff --git a/.ruby-version b/.ruby-version
index 5f6fc5edc2..7921bd0c89 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-3.3.10
+3.4.8
diff --git a/Dockerfile b/Dockerfile
index 2c7ed56f58..5af71e90e9 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM ruby:3.3.10-alpine3.19 AS base
+FROM ruby:3.4.8-alpine3.19 AS base
 ENV LANG=C.UTF-8 \
     LC_ALL=C.UTF-8 \
     TZ=Europe/London \
diff --git a/Gemfile.lock b/Gemfile.lock
index c81e0fd26f..e86a88289b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1114,7 +1114,7 @@ DEPENDENCIES
   wkhtmltopdf-binary
 
 RUBY VERSION
-   ruby 3.3.10p183
+  ruby 3.4.8p72
 
 BUNDLED WITH
-   2.5.22
+  4.0.3