1 files changed, 1 insertions, 1 deletions
diff --git a/core/src/main/scala/forge/Target.scala b/core/src/main/scala/forge/Target.scala
index a829d433..71d8e52b 100644
--- a/core/src/main/scala/forge/Target.scala
+++ b/core/src/main/scala/forge/Target.scala
@@ -35,7 +35,7 @@ object Target{
   trait Cacher{
     private[this] val cacherLazyMap = mutable.Map.empty[sourcecode.Enclosing, Target[_]]
     protected[this] def cachedTarget[T](t: => Target[T])
-                                      (implicit c: sourcecode.Enclosing): Target[T] = {
+                                      (implicit c: sourcecode.Enclosing): Target[T] = synchronized{
       cacherLazyMap.getOrElseUpdate(c, t).asInstanceOf[Target[T]]
     }
   }