diff --git a/.classpath b/.classpath
index 4ec17d0..45b824c 100644
--- a/.classpath
+++ b/.classpath
@@ -5,5 +5,6 @@
 	<classpathentry kind="lib" path="extern/args4j.jar"/>
 	<classpathentry kind="lib" path="extern/jna.jar"/>
 	<classpathentry kind="lib" path="extern/platform.jar"/>
+	<classpathentry kind="lib" path="extern/zip4j.jar"/>
 	<classpathentry kind="output" path="bin"/>
 </classpath>