diff --git a/restservice/src/main/java/com/plannaplan/controllers/ExchangeController.java b/restservice/src/main/java/com/plannaplan/controllers/ExchangeController.java
index 7b90d64..9470b3c 100644
--- a/restservice/src/main/java/com/plannaplan/controllers/ExchangeController.java
+++ b/restservice/src/main/java/com/plannaplan/controllers/ExchangeController.java
@@ -3,7 +3,6 @@ package com.plannaplan.controllers;
 import java.util.List;
 import java.util.Map;
 import java.util.Optional;
-import java.util.stream.Collector;
 import java.util.stream.Collectors;
 
 import com.plannaplan.App;