diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c84db15..e012338 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -5,6 +5,10 @@ on:
     branches: [main]
   pull_request:
 
+concurrency:
+  group: ci-${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   go:
     name: build and test
diff --git a/.github/workflows/vercel.yml b/.github/workflows/vercel.yml
index b31dfb3..8a915ac 100644
--- a/.github/workflows/vercel.yml
+++ b/.github/workflows/vercel.yml
@@ -3,7 +3,17 @@ name: vercel
 on:
   push:
     branches: [main]
+    paths:
+      - web/**
+      - .github/workflows/**
   pull_request:
+    paths:
+      - web/**
+      - .github/workflows/**
+
+concurrency:
+  group: vercel-${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
 
 jobs:
   deploy: