diff --git a/.github/workflows/pull_requests.yml b/.github/workflows/pull_requests.yml
index 00dedd4e6..95b5929e0 100644
--- a/.github/workflows/pull_requests.yml
+++ b/.github/workflows/pull_requests.yml
@@ -3,10 +3,16 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}-latest
     strategy:
       matrix:
-        version: [ 8, 11, 17 ]
+        version: [8, 11, 17]
+        os: ["ubuntu", "windows", "macos"]
+        exclude:
+        - version: 8
+          os: macos
+        - version: 8
+          os: windows
     steps:
       - name: Checkout
         uses: actions/checkout@v4
diff --git a/pom.xml b/pom.xml
index cfe289afe..7e926ec38 100644
--- a/pom.xml
+++ b/pom.xml
@@ -10,7 +10,7 @@
         <version.junit5>5.10.3</version.junit5>
         <version.okhttp>4.12.0</version.okhttp>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <version.unleash.specification>5.1.9</version.unleash.specification>
+        <version.unleash.specification>5.1.7</version.unleash.specification>
         <arguments />
         <version.jackson>2.17.2</version.jackson>
         <version.logback>1.3.14</version.logback>
@@ -59,8 +59,8 @@
         <dependency>
             <groupId>io.getunleash</groupId>
             <artifactId>yggdrasil-engine</artifactId>
-            <version>0.1.0-alpha.9</version>
-            <classifier>x86_64-linux</classifier>
+            <version>0.1.0-alpha.12</version>
+            <classifier>${os.detected.classifier}</classifier>
         </dependency>
         <dependency>
             <groupId>com.google.code.gson</groupId>
@@ -162,6 +162,13 @@
     </dependencies>
 
     <build>
+        <extensions>
+            <extension>
+                <groupId>kr.motd.maven</groupId>
+                <artifactId>os-maven-plugin</artifactId>
+                <version>1.7.0</version>
+            </extension>
+        </extensions>
         <resources>
             <resource>
                 <directory>src/main/resources</directory>