diff --git a/.github/workflows/push.yml b/.github/workflows/push.yml
index fc26969c..e9a1467f 100644
--- a/.github/workflows/push.yml
+++ b/.github/workflows/push.yml
@@ -18,7 +18,7 @@ jobs:
         java:
           - '8'
           - '11'
-          - '17'
+          - '20'
         os:
           - 'ubuntu-latest'
           - 'windows-latest'
@@ -45,6 +45,9 @@ jobs:
         - os: windows-latest
           architecture: 'x86'
           python: 'pypy-3.9'
+        - os: windows-latest
+          architecture: 'x86'
+          java: '20'
 
     runs-on: ${{ matrix.os }}
     steps:
diff --git a/build.xml b/build.xml
index 723783d1..43c24665 100644
--- a/build.xml
+++ b/build.xml
@@ -1,6 +1,6 @@
 <project>
-    <property name="ant.build.javac.source" value="1.7" />
-    <property name="ant.build.javac.target" value="1.7" />
+    <property name="ant.build.javac.source" value="8" />
+    <property name="ant.build.javac.target" value="8" />
 
     <target name="clean">
       <delete dir="build/classes"/>
diff --git a/setup.py b/setup.py
index d6e94494..012735b2 100644
--- a/setup.py
+++ b/setup.py
@@ -70,7 +70,7 @@ def getenv(key):
 def compile_native_invocation_handler(java):
     '''Find javac and compile NativeInvocationHandler.java.'''
     javac = java.get_javac()
-    source_level = '1.7'
+    source_level = '8'
     try:
         subprocess.check_call([
             javac, '-target', source_level, '-source', source_level,