diff --git a/DragonECS.csproj b/DragonECS.csproj
index 55f91c7..2722d48 100644
--- a/DragonECS.csproj
+++ b/DragonECS.csproj
@@ -10,7 +10,7 @@
         <RootNamespace>DCFApixels.DragonECS</RootNamespace>
 
         <Title>DragonECS</Title>
-        <Version>0.8.41</Version>
+        <Version>0.8.42</Version>
         <Authors>DCFApixels</Authors>
         <Description>ECS Framework for Game Engines with C# and .Net Platform</Description>
         <Copyright>DCFApixels</Copyright>
diff --git a/package.json b/package.json
index 0610af7..dc6af0d 100644
--- a/package.json
+++ b/package.json
@@ -8,7 +8,7 @@
     "displayName": "DragonECS",
     "description": "C# Entity Component System Framework",
     "unity": "2020.3",
-    "version": "0.8.41",
+    "version": "0.8.42",
     "repository": {
         "type": "git",
         "url": "https://github.com/DCFApixels/DragonECS.git"
diff --git a/src/Collections/EcsGroup.cs b/src/Collections/EcsGroup.cs
index f1e0ec1..0bd8715 100644
--- a/src/Collections/EcsGroup.cs
+++ b/src/Collections/EcsGroup.cs
@@ -372,16 +372,15 @@ namespace DCFApixels.DragonECS
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public EcsSpan Slice(int start)
         {
-            return Slice(start, _count - start + 1);
+            return Slice(start, _count - start);
         }
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public EcsSpan Slice(int start, int length)
         {
-            start++;
 #if (DEBUG && !DISABLE_DEBUG) || ENABLE_DRAGONECS_ASSERT_CHEKS
-            if (start < 1 || start + length > _count) { Throw.ArgumentOutOfRange(); }
+            if (start < 0 || start + length > _count) { Throw.ArgumentOutOfRange(); }
 #endif
-            return new EcsSpan(WorldID, _dense, start, length);
+            return new EcsSpan(WorldID, _dense, start + 1, length);
         }
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public EcsSpan ToSpan()