diff --git a/Scripts/kext_maestro.py b/Scripts/kext_maestro.py
index 4e7f42b..ea17c7a 100644
--- a/Scripts/kext_maestro.py
+++ b/Scripts/kext_maestro.py
@@ -370,8 +370,8 @@ class KextMaestro:
                 if dep_identifier in bundle_dict:
                     visit(bundle_dict[dep_identifier])
                     
-                    bundle["MaxKernel"] = bundle["MaxKernel"] if self.utils.parse_darwin_version(bundle["MaxKernel"]) < self.utils.parse_darwin_version(bundle_dict[dep_identifier]["MaxKernel"]) else bundle_dict[dep_identifier]["MaxKernel"]
-                    bundle["MinKernel"] = bundle["MinKernel"] if self.utils.parse_darwin_version(bundle["MinKernel"]) > self.utils.parse_darwin_version(bundle_dict[dep_identifier]["MinKernel"]) else bundle_dict[dep_identifier]["MinKernel"]
+                    bundle["MaxKernel"] = bundle["MaxKernel"] if self.utils.parse_darwin_version(bundle["MaxKernel"]) < self.utils.parse_darwin_version(bundle_dict[dep_identifier].get("MaxKernel", "99.99.99")) else bundle_dict[dep_identifier]["MaxKernel"]
+                    bundle["MinKernel"] = bundle["MinKernel"] if self.utils.parse_darwin_version(bundle["MinKernel"]) > self.utils.parse_darwin_version(bundle_dict[dep_identifier].get("MinKernel", "0.0.0")) else bundle_dict[dep_identifier]["MinKernel"]
 
             if os.path.splitext(os.path.basename(bundle.get("BundlePath")))[0] == "AirPortBrcm4360_Injector":
                 bundle["MaxKernel"] = "19.99.99"