diff --git a/.github/workflows/swift.yml b/.github/workflows/swift.yml
index 5dbdb4f..e68fff3 100644
--- a/.github/workflows/swift.yml
+++ b/.github/workflows/swift.yml
@@ -13,6 +13,8 @@ jobs:
 
     steps:
     - uses: actions/checkout@v2
+    - name: Switch Xcode
+      run: sudo xcode-select -s /Applications/Xcode_12.2.app
     - name: Build
       run: swift build -v
     - name: Run tests
diff --git a/.gitignore b/.gitignore
index ed847ba..ad4953f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,4 @@
 Example/Punycode.xcodeproj/project.xcworkspace/xcshareddata
 Example/Punycode.xcodeproj/project.xcworkspace/xcuserdata
 Example/Punycode.xcodeproj/xcuserdata
-    
\ No newline at end of file
+.build