diff --git a/src/ruby-rails-postgres/devcontainer-template.json b/src/ruby-rails-postgres/devcontainer-template.json
index 906917d..2f36261 100644
--- a/src/ruby-rails-postgres/devcontainer-template.json
+++ b/src/ruby-rails-postgres/devcontainer-template.json
@@ -22,7 +22,7 @@
                 "3.2-bullseye",
                 "3.1-bullseye"
             ],
-            "default": "3.4-bullseye"
+            "default": "3.3-bullseye"
         }
     },
     "platforms": ["Ruby"],