diff --git a/scripts/build-unit-test-docker b/scripts/build-unit-test-docker
index 6ace781..35ed069 100755
--- a/scripts/build-unit-test-docker
+++ b/scripts/build-unit-test-docker
@@ -125,7 +125,7 @@
         ],
     ),
     "Naios/function2": PackageDef(
-        rev="4.2.1",
+        rev="4.2.4",
         build_type="custom",
         build_steps=[
             f"mkdir {prefix}/include/function2",