diff --git a/asm/src/main/java/dev/openrs2/asm/ClassVersionUtils.kt b/asm/src/main/java/dev/openrs2/asm/ClassVersionUtils.kt
new file mode 100644
index 00000000..76d4c379
--- /dev/null
+++ b/asm/src/main/java/dev/openrs2/asm/ClassVersionUtils.kt
@@ -0,0 +1,15 @@
+package dev.openrs2.asm
+
+object ClassVersionUtils {
+    private fun swapWords(v: Int): Int {
+        return (v shl 16) or (v ushr 16)
+    }
+
+    fun maxVersion(v1: Int, v2: Int): Int {
+        return if (swapWords(v1) > swapWords(v2)) {
+            v1
+        } else {
+            v2
+        }
+    }
+}