diff --git a/About/About.xml b/About/About.xml
index 66cdcba..bb77cb7 100644
--- a/About/About.xml
+++ b/About/About.xml
@@ -3,7 +3,7 @@
   <name>Level Up!</name>
   <author>krafs</author>
   <packageId>Krafs.LevelUp</packageId>
-  <modVersion>5.1.0</modVersion>
+  <modVersion>5.1.1</modVersion>
   <description>Level up notifications!</description>
   <url>https://github.com/krafs/LevelUp</url>
   <modIconPath>LevelUp/Icon</modIconPath>
diff --git a/LevelUp.csproj b/LevelUp.csproj
index 1af6968..b5fbfb9 100644
--- a/LevelUp.csproj
+++ b/LevelUp.csproj
@@ -16,7 +16,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Krafs.Rimworld.Ref" Version="1.6.4488-beta" />
+    <PackageReference Include="Krafs.Rimworld.Ref" Version="1.6.4518" />
     <PackageReference Include="Lib.Harmony" Version="2.3.6" ExcludeAssets="runtime" />
   </ItemGroup>
 
diff --git a/Source/ActionMaker.cs b/Source/ActionMaker.cs
index 142bb19..9ca8764 100644
--- a/Source/ActionMaker.cs
+++ b/Source/ActionMaker.cs
@@ -13,11 +13,6 @@ public sealed class ActionMaker : IExposable
 
     internal void ExecuteActions(LevelingInfo levelingInfo)
     {
-        if (!levelingInfo.Pawn.IsFreeColonist)
-        {
-            return;
-        }
-
         foreach (LevelingAction action in actions)
         {
             if (action.active)
diff --git a/Source/Patcher.cs b/Source/Patcher.cs
index 49e3360..86000c8 100644
--- a/Source/Patcher.cs
+++ b/Source/Patcher.cs
@@ -30,14 +30,25 @@ internal static void ApplyPatches(Harmony harmony)
     }
 
     [SuppressMessage("Style", "IDE1006:Naming Styles", Justification = "Harmony naming convention")]
-    private static void Prefix(out int __state, SkillRecord __instance)
+    private static void Prefix(out int __state, SkillRecord __instance, Pawn ___pawn)
     {
+        if (!___pawn.IsFreeColonist)
+        {
+            __state = -1;
+            return;
+        }
+        
         __state = __instance.Level;
     }
 
     [SuppressMessage("Style", "IDE1006:Naming Styles", Justification = "Harmony naming convention")]
     private static void DirtyAptitudesPostfix(int __state, SkillRecord __instance, Pawn ___pawn)
     {
+        if (__state == -1)
+        {
+            return;
+        }
+        
         // DirtyAptitudes can be called on the Create Character-screen if Biotech is used,
         // and either crashes or makes it impossible to move forward.
         // This causes the mod to try and display notifications for a colonist when not yet in a playable program state.
@@ -66,6 +77,11 @@ private static void DirtyAptitudesPostfix(int __state, SkillRecord __instance, P
     [SuppressMessage("Style", "IDE1006:Naming Styles", Justification = "Harmony naming convention")]
     private static void LearnPostfix(int __state, SkillRecord __instance, Pawn ___pawn, bool direct)
     {
+        if (__state == -1)
+        {
+            return;
+        }
+        
         int previousLevel = __state;
         int currentLevel = __instance.Level;