diff --git a/src/main/java/org/jboss/jdeparser/Assertions.java b/src/main/java/org/jboss/jdeparser/Assertions.java
index 017c645..5b22dcc 100644
--- a/src/main/java/org/jboss/jdeparser/Assertions.java
+++ b/src/main/java/org/jboss/jdeparser/Assertions.java
@@ -18,7 +18,7 @@
 
 package org.jboss.jdeparser;
 
-import sun.reflect.Reflection;
+import java.util.Set;
 
 /**
  * @author <a href="mailto:david.lloyd@redhat.com">David M. Lloyd</a>
@@ -26,7 +26,8 @@
 class Assertions {
     static boolean callerIs(Class<?> clazz) {
         try {
-            return Reflection.getCallerClass(3) == clazz;
+            StackWalker walker = StackWalker.getInstance(Set.of(StackWalker.Option.SHOW_REFLECT_FRAMES), 3);
+            return walker.getCallerClass() == clazz;
         } catch (Throwable ignored) {}
         // dunno
         return true;