diff --git a/.github/workflows/update-data.yml b/.github/workflows/update-data.yml
index 24df0262a..7a96db7d6 100644
--- a/.github/workflows/update-data.yml
+++ b/.github/workflows/update-data.yml
@@ -23,6 +23,10 @@ on:
 permissions:
   contents: write
 
+concurrency:
+  group: update-nist-cmvp-data-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   scrape-and-update:
     runs-on: ubuntu-latest
diff --git a/.github/workflows/validate.yml b/.github/workflows/validate.yml
index 7b3c02896..9ca4fe9bf 100644
--- a/.github/workflows/validate.yml
+++ b/.github/workflows/validate.yml
@@ -5,11 +5,14 @@ on:
   push:
     branches:
       - main
-      - 'codex/**'
 
 permissions:
   contents: read
 
+concurrency:
+  group: validate-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
 jobs:
   test:
     runs-on: ubuntu-latest