diff --git a/.github/workflows/build_mac.yml b/.github/workflows/build_mac.yml
index 75b0b9e1..b2234ebd 100644
--- a/.github/workflows/build_mac.yml
+++ b/.github/workflows/build_mac.yml
@@ -11,7 +11,7 @@ jobs:
 
     strategy:
       matrix:
-        os: [ macos-10.15 ]
+        os: [ macos-11 ]
 
     steps:
     - uses: actions/checkout@v2
diff --git a/.github/workflows/deploy_mac.yml b/.github/workflows/deploy_mac.yml
index e4cd7b99..2c5f06b5 100644
--- a/.github/workflows/deploy_mac.yml
+++ b/.github/workflows/deploy_mac.yml
@@ -8,7 +8,7 @@ env:
 jobs:
   build:
   
-    runs-on: macos-10.15
+    runs-on: macos-11
 
     steps:
     - uses: actions/checkout@v2