diff --git a/PorygonSharp/EvalValues/ObjectEvalValueHandler.cs b/PorygonSharp/EvalValues/ObjectEvalValueHandler.cs
index 1e5f359..2ea8682 100644
--- a/PorygonSharp/EvalValues/ObjectEvalValueHandler.cs
+++ b/PorygonSharp/EvalValues/ObjectEvalValueHandler.cs
@@ -1,5 +1,5 @@
 using System;
-using System.Collections.Generic;
+using System.Collections.Concurrent;
 using System.Runtime.InteropServices;
 
 namespace PorygonSharp.EvalValues
@@ -18,7 +18,7 @@ namespace PorygonSharp.EvalValues
             }
         }
         
-        private static readonly Dictionary<int, PtrObject> CreatedPointers = new Dictionary<int, PtrObject>();
+        private static readonly ConcurrentDictionary<int, PtrObject> CreatedPointers = new ConcurrentDictionary<int, PtrObject>();
 
         public static IntPtr GetObjectPtr(object o)
         {
@@ -31,13 +31,13 @@ namespace PorygonSharp.EvalValues
                 }
                 else
                 {
-                    CreatedPointers.Remove(hash);
+                    CreatedPointers.TryRemove(hash, out _);
                 }
             }
             var handle   = GCHandle.Alloc(o, GCHandleType.WeakTrackResurrection);
             var ptr = GCHandle.ToIntPtr(handle);
             ptrObject = new PtrObject(ptr, new WeakReference<object>(o));
-            CreatedPointers.Add(o.GetHashCode(), ptrObject);
+            CreatedPointers.TryAdd(o.GetHashCode(), ptrObject);
             return ptrObject.Pointer;
         }
     }