diff --git a/src/main/java/com/github/prominence/openweathermap/api/BasicRequester.java b/src/main/java/com/github/prominence/openweathermap/api/BasicRequester.java
index 6a79da1..a4bd14f 100644
--- a/src/main/java/com/github/prominence/openweathermap/api/BasicRequester.java
+++ b/src/main/java/com/github/prominence/openweathermap/api/BasicRequester.java
@@ -22,7 +22,6 @@
 
 package com.github.prominence.openweathermap.api;
 
-import com.github.prominence.openweathermap.api.constants.System;
 import com.github.prominence.openweathermap.api.constants.Unit;
 import com.github.prominence.openweathermap.api.exception.DataNotFoundException;
 import com.github.prominence.openweathermap.api.exception.InvalidAuthTokenException;
diff --git a/src/main/java/com/github/prominence/openweathermap/api/UltravioletIndexRequester.java b/src/main/java/com/github/prominence/openweathermap/api/UltravioletIndexRequester.java
index a6b370b..fc98e4b 100644
--- a/src/main/java/com/github/prominence/openweathermap/api/UltravioletIndexRequester.java
+++ b/src/main/java/com/github/prominence/openweathermap/api/UltravioletIndexRequester.java
@@ -23,7 +23,6 @@
 package com.github.prominence.openweathermap.api;
 
 import com.alibaba.fastjson.TypeReference;
-import com.github.prominence.openweathermap.api.constants.System;
 import com.github.prominence.openweathermap.api.exception.DataNotFoundException;
 import com.github.prominence.openweathermap.api.exception.InvalidAuthTokenException;
 import com.github.prominence.openweathermap.api.model.Coordinates;