diff --git a/.github/workflows/manifold.yml b/.github/workflows/manifold.yml
index 575e27941..a4b44ab65 100644
--- a/.github/workflows/manifold.yml
+++ b/.github/workflows/manifold.yml
@@ -280,7 +280,7 @@ jobs:
     strategy:
       matrix:
         parallel_backend: [NONE, TBB]
-    runs-on: macos-latest
+    runs-on: macos-12
     if: github.event.pull_request.draft == false
     steps:
     - name: Install common dependencies
diff --git a/bindings/java/pom.xml b/bindings/java/pom.xml
index 9810b09d7..db9b9009f 100644
--- a/bindings/java/pom.xml
+++ b/bindings/java/pom.xml
@@ -8,8 +8,8 @@
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <maven.compiler.source>11</maven.compiler.source>
-        <maven.compiler.target>11</maven.compiler.target>
+        <maven.compiler.source>17</maven.compiler.source>
+        <maven.compiler.target>17</maven.compiler.target>
     </properties>
 
     <dependencies>