diff --git a/.github/workflows/PR_build.yml b/.github/workflows/PR_build.yml
index 9afa8ae8..1f8a3ea9 100644
--- a/.github/workflows/PR_build.yml
+++ b/.github/workflows/PR_build.yml
@@ -77,12 +77,12 @@ jobs:
   xcode:
     name: XCode
     needs: clang
-    runs-on: macos-10.15
+    runs-on: macos-11
     strategy:
       fail-fast: false
       matrix:
         include:
-          - xcode: "12.4"
+          - xcode: "13.2.1"
     steps:
       - name: Checkout
         uses: actions/checkout@v2
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 676a340a..90953049 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -115,7 +115,7 @@ jobs:
   xcode:
     name: XCode
     needs: clang
-    runs-on: macos-10.15
+    runs-on: macos-11
     strategy:
       fail-fast: false
       matrix:
@@ -123,6 +123,7 @@ jobs:
           - xcode: "10.3"
           - xcode: "11.7"
           - xcode: "12.4"
+          - xcode: "13.2.1"
     steps:
       - name: Checkout
         uses: actions/checkout@v2