diff --git a/build.xml b/build.xml
index a062c7c..0afe127 100644
--- a/build.xml
+++ b/build.xml
@@ -1,6 +1,6 @@
 <project>
-    <property name="ant.build.javac.source" value="1.6" />
-    <property name="ant.build.javac.target" value="1.6" />
+    <property name="ant.build.javac.source" value="1.7" />
+    <property name="ant.build.javac.target" value="1.7" />
 
     <target name="clean">
       <delete dir="build/classes"/>
diff --git a/setup.py b/setup.py
index 6914b5b..14be7f7 100644
--- a/setup.py
+++ b/setup.py
@@ -96,20 +96,12 @@ def find_javac(possible_homes):
 def compile_native_invocation_handler(*possible_homes):
     '''Find javac and compile NativeInvocationHandler.java.'''
     javac = find_javac(possible_homes)
-    source_level = '1.6'
-    # We have to check what version of javac this is, because -target 1.6 is
-    # no longer supported on JDKs >= 12.
-    javac_version = subprocess.check_output([javac, '-version'],
-                                            stderr=subprocess.STDOUT)
-    for m in re.finditer(r'\d+', javac_version.decode('ascii')):
-        if int(m.group(0)) >= 12:
-            source_level = '1.7'
-        break
+    source_level = '1.7'
     try:
-      subprocess.check_call([
-        javac, '-target', source_level, '-source', source_level,
-        join('jnius', 'src', 'org', 'jnius', 'NativeInvocationHandler.java')
-    ])
+        subprocess.check_call([
+            javac, '-target', source_level, '-source', source_level,
+            join('jnius', 'src', 'org', 'jnius', 'NativeInvocationHandler.java')
+        ])
     except FileNotFoundError:
         subprocess.check_call([
             javac.replace('"', ''), '-target', source_level, '-source', source_level,