diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 51613a4..687632d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -22,7 +22,7 @@ jobs:
     name: Build and Test
     strategy:
       matrix:
-        os: [ubuntu-latest, macos-latest]
+        os: [ubuntu-latest, macos-12]
         scala: [2.12.19]
         java: [temurin@8, temurin@11, temurin@17, temurin@21]
     runs-on: ${{ matrix.os }}
diff --git a/build.sbt b/build.sbt
index 201af9e..d807486 100644
--- a/build.sbt
+++ b/build.sbt
@@ -86,7 +86,7 @@ ThisBuild / githubWorkflowPublish := Seq(
   )
 )
 
-ThisBuild / githubWorkflowOSes := Seq("ubuntu-latest", "macos-latest")
+ThisBuild / githubWorkflowOSes := Seq("ubuntu-latest", "macos-12")
 
 ThisBuild / githubWorkflowJavaVersions := Seq(
   JavaSpec.temurin("8"),