diff --git a/.github/workflows/continuous_deployment.yml b/.github/workflows/continuous_deployment.yml
index 6df647bd..c375ac45 100644
--- a/.github/workflows/continuous_deployment.yml
+++ b/.github/workflows/continuous_deployment.yml
@@ -104,7 +104,7 @@ jobs:
         strategy:
             fail-fast: false
             matrix:
-                os: [{genus: macos-10.15, family: osx}]
+                os: [{genus: macos-11, family: osx}]
                 compiler: [{cc: clang, cxx: clang++}]
                 cmake_build_type: [Debug, Release]
         steps:
diff --git a/.github/workflows/continuous_integration.yml b/.github/workflows/continuous_integration.yml
index feec0dc2..7c36c688 100644
--- a/.github/workflows/continuous_integration.yml
+++ b/.github/workflows/continuous_integration.yml
@@ -64,7 +64,7 @@ jobs:
         strategy:
             fail-fast: false
             matrix:
-                os: [macos-10.15]
+                os: [macos-11]
                 compiler: [{cc: clang, cxx: clang++}]
                 cmake_build_type: [Debug, Release]
         steps: