diff --git a/.github/workflows/downstream.yml b/.github/workflows/downstream.yml
index e9f69fb7..c3829c51 100644
--- a/.github/workflows/downstream.yml
+++ b/.github/workflows/downstream.yml
@@ -8,6 +8,10 @@ on:
       - "lua/nvim-treesitter/parsers.lua"
   workflow_dispatch:
 
+concurrency:
+  group: ${{ github.workflow }}-generate-${{ github.ref }}
+  cancel-in-progress: ${{ github.event_name == 'pull_request' }}
+
 jobs:
   test-downstream:
     name: Check downstream queries