diff --git a/.github/main.workflow b/.github/main.workflow
index 99b3568e..cf141b0f 100644
--- a/.github/main.workflow
+++ b/.github/main.workflow
@@ -23,7 +23,7 @@ action "Compile" {
 action "Format" {
   needs = "Dependencies"
   uses = "actions/npm@v2.0.0"
-  args = "run format"
+  args = "run format-check"
 }
 
 action "Test" {
diff --git a/package.json b/package.json
index c93a4cda..e4fc977b 100644
--- a/package.json
+++ b/package.json
@@ -4,7 +4,8 @@
   "scripts": {
     "bootstrap": "lerna bootstrap",
     "build": "lerna run tsc",
-    "format": "prettier --check packages/*/src/**/*.ts",
+    "format": "prettier --write packages/*/src/**/*.ts",
+    "format-check": "prettier --check packages/*/src/**/*.ts",
     "new-package": "scripts/create-package",
     "test": "jest"
   },