diff --git a/src/main/java/burp/core/utils/HashCalculator.java b/src/main/java/burp/core/utils/HashCalculator.java
index a61f35f..4546581 100644
--- a/src/main/java/burp/core/utils/HashCalculator.java
+++ b/src/main/java/burp/core/utils/HashCalculator.java
@@ -1,5 +1,7 @@
 package burp.core.utils;
 
+import burp.BurpExtender;
+
 import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;