diff --git a/.github/workflows/build-c-libraries.yml b/.github/workflows/build-c-libraries.yml
index fd020e99..d0767b34 100644
--- a/.github/workflows/build-c-libraries.yml
+++ b/.github/workflows/build-c-libraries.yml
@@ -31,7 +31,7 @@ jobs:
             matrix: macos
             runs-on:
               arm: [macOS, ARM64]
-              intel: [macos-12]
+              intel: [macos-13]
           - name: Ubuntu
             matrix: ubuntu
             runs-on:
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 8a66b591..f32532ce 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -30,8 +30,8 @@ jobs:
           - name: macOS
             matrix: macos
             runs-on:
-              arm: [macos-12-arm64]
-              intel: [macos-12]
+              arm: [macos-13-arm64]
+              intel: [macos-13]
             cibw-archs-macos:
               arm: arm64
               intel: x86_64
diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
index aa149c71..7000579a 100644
--- a/.github/workflows/test.yaml
+++ b/.github/workflows/test.yaml
@@ -17,8 +17,8 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [macos-12, ubuntu-latest]
-        config: [ optimized=1, TSAN=1, ASAN=1]
+        os: [macos-13, ubuntu-latest]
+        config: [optimized=1, TSAN=1, ASAN=1]
 
     steps:
     - name: Checkout code
diff --git a/pyproject.toml b/pyproject.toml
index ca0b0b20..1568458d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -34,7 +34,7 @@ before-build = "python -m pip install --upgrade pip"
 build-verbosity = 0
 before-all = "brew install gmp boost cmake"
 before-build = "python -m pip install --upgrade pip"
-environment = {MACOSX_DEPLOYMENT_TARGET="12", SYSTEM_VERSION_COMPAT=0, BUILD_VDF_CLIENT="N"}
+environment = {MACOSX_DEPLOYMENT_TARGET="13", SYSTEM_VERSION_COMPAT=0, BUILD_VDF_CLIENT="N"}
 
 [tool.cibuildwheel.windows]
 build-verbosity = 0