diff --git a/1.3/Assemblies/RJW_Menstruation.dll b/1.3/Assemblies/RJW_Menstruation.dll
index a0bf21e..f82dc69 100644
Binary files a/1.3/Assemblies/RJW_Menstruation.dll and b/1.3/Assemblies/RJW_Menstruation.dll differ
diff --git a/1.3/source/RJW_Menstruation/RJW_Menstruation/Things.cs b/1.3/source/RJW_Menstruation/RJW_Menstruation/Things.cs
index ef1f0fa..324f428 100644
--- a/1.3/source/RJW_Menstruation/RJW_Menstruation/Things.cs
+++ b/1.3/source/RJW_Menstruation/RJW_Menstruation/Things.cs
@@ -102,7 +102,7 @@ namespace RJW_Menstruation
         {
             get
             {
-                return thingDefName?.Length < 1;
+                return (thingDefName?.Length ?? 0) < 1;
             }
         }
         public ThingDef GetDef
@@ -131,7 +131,7 @@ namespace RJW_Menstruation
             if (hybridExtension.NullOrEmpty()) return null;
             else
             {
-                return hybridExtension.Find(x => x.GetDef.defName?.Equals(race) ?? false);
+                return hybridExtension.Find(x => x.GetDef?.defName?.Equals(race) ?? false);
             }
         }
 
@@ -165,7 +165,7 @@ namespace RJW_Menstruation
         {
             get
             {
-                return thingDefName?.Length < 1;
+                return (thingDefName?.Length ?? 0) < 1;
             }
         }
         public ThingDef GetDef