diff --git a/backend/app/services/auth_service.py b/backend/app/services/auth_service.py
index 91e34f9..fcb9798 100644
--- a/backend/app/services/auth_service.py
+++ b/backend/app/services/auth_service.py
@@ -41,5 +41,9 @@ def change_password(
     """
     if not verify_password(current_password, user.hashed_password):
         raise BusinessRuleViolation("Current password is incorrect")
+    if verify_password(new_password, user.hashed_password):
+        raise BusinessRuleViolation(
+            "New password must be different from the current password"
+        )
     user.hashed_password = hash_password(new_password)
     user.must_change_password = False