diff --git a/README.md b/README.md
index 4b2b9bd..3d61d35 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 Simple Logger C#.NET
 =============
 
-Very easy to use.
+Very easy to use. (This logger is not THREAD safe !)
 
 Usage
 -------
@@ -125,4 +125,4 @@ Modules
         Logger.Modules.Install(new MsSqlDatabaseLoggerModule(connectionString));
         Logger.Log("My first database log! ");
     }
-```
\ No newline at end of file
+```