diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9f9534f..f98eadf 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -27,7 +27,7 @@ jobs:
     name: Build and Test
     strategy:
       matrix:
-        os: [ubuntu-latest, macos-12, macos-14]
+        os: [ubuntu-latest, macos-13, macos-14]
         scala: [3, 2.13]
         java: [temurin@21, temurin@17]
         project: [rootJVM, rootNative]
@@ -36,7 +36,7 @@ jobs:
             java: temurin@17
           - project: rootNative
             java: temurin@17
-          - os: macos-12
+          - os: macos-13
             project: rootJVM
           - os: macos-14
             project: rootJVM
@@ -87,8 +87,8 @@ jobs:
           /home/linuxbrew/.linuxbrew/bin/brew install llvm@17 s2n utf8proc
           echo "LLVM_BIN=/home/linuxbrew/.linuxbrew/opt/llvm@17/bin" >> $GITHUB_ENV
 
-      - name: Install native dependencies (macos-12)
-        if: (matrix.project == 'rootNative') && matrix.os == 'macos-12'
+      - name: Install native dependencies (macos-13)
+        if: (matrix.project == 'rootNative') && matrix.os == 'macos-13'
         run: |
           brew install llvm@17 s2n utf8proc
           echo "LLVM_BIN=/usr/local/opt/llvm@17/bin" >> $GITHUB_ENV
diff --git a/build.sbt b/build.sbt
index f4faf7f..f33bddd 100644
--- a/build.sbt
+++ b/build.sbt
@@ -24,7 +24,7 @@ ThisBuild / semanticdbVersion := scalafixSemanticdb.revision // use Scalafix com
 
 // githubWorkflow
 lazy val macOsArm   = "macos-14"
-lazy val macOsIntel = "macos-12"
+lazy val macOsIntel = "macos-13"
 lazy val macOses    = Seq(macOsIntel, macOsArm)
 ThisBuild / githubWorkflowOSes ++= Seq(macOsIntel, macOsArm)
 ThisBuild / githubWorkflowBuildMatrixExclusions ++= macOses.map(os =>