diff --git a/src/DataEnricher/Mustache.php b/src/DataEnricher/Mustache.php
index d5d8030..3ff7919 100644
--- a/src/DataEnricher/Mustache.php
+++ b/src/DataEnricher/Mustache.php
@@ -3,6 +3,7 @@
 namespace LegalThings\DataEnricher;
 
 use LegalThings\DataEnricher as DataEnricher;
+use Mustache_Engine;
 
 /**
  * Process string as Mustache template