diff --git a/lib/thirdpartylibs.xml b/lib/thirdpartylibs.xml
index 52d9e919bbe..8be568e5d81 100644
--- a/lib/thirdpartylibs.xml
+++ b/lib/thirdpartylibs.xml
@@ -270,4 +270,10 @@
     <license>MIT</license>
     <version>1.0.0</version>
   </library>
+  <library>
+    <location>graphlib.php</location>
+    <name>Graph Class</name>
+    <license>GPL</license>
+    <version>1.6.3</version>
+  </library>
 </libraries>