diff --git a/core/src/main/java/com/github/games647/fastlogin/core/shared/LoginSession.java b/core/src/main/java/com/github/games647/fastlogin/core/shared/LoginSession.java
index 33b5ff5c..3935ada4 100644
--- a/core/src/main/java/com/github/games647/fastlogin/core/shared/LoginSession.java
+++ b/core/src/main/java/com/github/games647/fastlogin/core/shared/LoginSession.java
@@ -52,7 +52,7 @@ public abstract class LoginSession {
         return requestUsername;
     }
 
-    public String getUsername() {
+    public synchronized String getUsername() {
         return username;
     }