diff --git a/.ruby-version b/.ruby-version
index be94e6f..a0891f5 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-3.2.2
+3.3.4
diff --git a/Dockerfile b/Dockerfile
index bb29888..906db49 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM ruby:3.2.2-alpine3.18
+FROM ruby:3.3.1-alpine3.18
 
 RUN apk add make gcc musl-dev
 RUN apk add ruby-webrick ruby-etc