diff --git a/.devcontainer/devcontainer.json b/.devcontainer/devcontainer.json
index 7bf7b61..f091448 100644
--- a/.devcontainer/devcontainer.json
+++ b/.devcontainer/devcontainer.json
@@ -1,6 +1,7 @@
 {
     "extensions": [
-        "gh-gh-dogfooding.codespaces-zero"
+        "gh-gh-dogfooding.codespaces-zero",
+        "rebornix.Ruby"
     ],
     "postCreateCommand": "bundle install --local",
     "codespaces": {
@@ -11,4 +12,4 @@
         "previewDelay:": 6000
       }
     }
-  }
\ No newline at end of file
+  }