diff --git a/.ruby-version b/.ruby-version
new file mode 100644
index 0000000..15a2799
--- /dev/null
+++ b/.ruby-version
@@ -0,0 +1 @@
+3.3.0
diff --git a/dev.yml b/dev.yml
index 22c0abf..98dff45 100644
--- a/dev.yml
+++ b/dev.yml
@@ -2,7 +2,7 @@ env:
   BOOTSNAP_PEDANTIC: '1'
 
 up:
-  - ruby: 2.6.0
+  - ruby
   - bundler
 commands:
   build: rake compile