diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
new file mode 100644
index 0000000..be1185b
--- /dev/null
+++ b/.github/workflows/main.yml
@@ -0,0 +1,17 @@
+name: Enforce PR Source Branch
+
+on:
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  check_branch:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Fail if PR is not from dev
+        run: |
+          if [[ "${{ github.head_ref }}" != "development" ]]; then
+            echo "Pull requests to main must come from the dev branch."
+            exit 1
+          fi