diff --git a/.github/workflows/size.yml b/.github/workflows/size.yml
index f237ef40..fd627574 100644
--- a/.github/workflows/size.yml
+++ b/.github/workflows/size.yml
@@ -1,23 +1,23 @@
 name: Compressed Size
-on: [push]
+on: [pull_request]
 
 jobs:
-  runner-job:
-    runs-on: ubuntu-latest
+    runner-job:
+        runs-on: ubuntu-latest
 
-    steps:
-      - name: Check out repository code
-        uses: actions/checkout@v3
-      - name: Setup node
-        uses: actions/setup-node@v3
-        with:
-          node-version: 16
-      - name: Install pnpm
-        run: npm install -g pnpm
-      - name: Install packages
-        run: pnpm install
-      - name: Check compressed size
-        uses: preactjs/compressed-size-action@v2
-        with:
-          build-script: "production"
-          pattern: "./lib/**/*.js"
+        steps:
+            - name: Check out repository code
+              uses: actions/checkout@v3
+            - name: Setup node
+              uses: actions/setup-node@v3
+              with:
+                  node-version: 16
+            - name: Install pnpm
+              run: npm install -g pnpm
+            - name: Install packages
+              run: pnpm install
+            - name: Check compressed size
+              uses: preactjs/compressed-size-action@v2
+              with:
+                  build-script: "production"
+                  pattern: "./lib/**/*.js"