diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5360db334..c5da7eafe 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -124,7 +124,7 @@ jobs:
       fail-fast: false
       matrix:
         # We want newer versions than 'latest' here to have current wasm-opt
-        os: ["ubuntu-22.04", "macos-12"]
+        os: ["ubuntu-22.04", "macos-15"]
     runs-on: ${{ matrix.os }}
     env:
       RUST_BACKTRACE: full
@@ -163,7 +163,7 @@ jobs:
       fail-fast: false
       matrix:
         # We want newer versions than 'latest' here to have current wasm-opt
-        os: ["ubuntu-22.04", "macos-12"]
+        os: ["ubuntu-22.04", "macos-15"]
         partition: [1, 2]
     runs-on: ${{ matrix.os }}
     env:
@@ -207,7 +207,7 @@ jobs:
       fail-fast: false
       matrix:
         # We want newer versions than 'latest' here to have current wasm-opt
-        os: ["ubuntu-22.04", "macos-12"]
+        os: ["ubuntu-22.04", "macos-15"]
         partition: [1, 2]
     runs-on: ${{ matrix.os }}
     env:
@@ -265,7 +265,7 @@ jobs:
       fail-fast: false
       matrix:
         # We want newer versions than 'latest' here to have current wasm-opt
-        os: ["ubuntu-22.04", "macos-12", "windows-2022"]
+        os: ["ubuntu-22.04", "macos-15", "windows-2022"]
     runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout