diff --git a/Dockerfile.development b/Dockerfile.development
index f941d95..b1b662d 100644
--- a/Dockerfile.development
+++ b/Dockerfile.development
@@ -1,5 +1,5 @@
 # This is for development or CI only
-FROM docker.io/ruby:3.4.8-alpine3.23 AS common
+FROM docker.io/ruby:4.0.0-alpine3.23 AS common
 
 RUN apk update \
     && apk upgrade \
diff --git a/Dockerfile.production b/Dockerfile.production
index 2065836..efd5051 100644
--- a/Dockerfile.production
+++ b/Dockerfile.production
@@ -1,4 +1,4 @@
-FROM docker.io/ruby:3.4.8-alpine3.23 AS base
+FROM docker.io/ruby:4.0.0-alpine3.23 AS base
 
 RUN apk update \
     && apk upgrade \
diff --git a/Gemfile.lock b/Gemfile.lock
index b016579..36e39e6 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -63,7 +63,7 @@ GEM
     benchmark (0.5.0)
     bigdecimal (3.3.1)
     bindex (0.8.1)
-    bootsnap (1.20.0)
+    bootsnap (1.20.1)
       msgpack (~> 1.2)
     builder (3.3.0)
     byebug (12.0.0)