diff --git a/references.bib b/references.bib
index 46dce65..c228356 100644
--- a/references.bib
+++ b/references.bib
@@ -232,7 +232,7 @@
 	booktitle = {Computer and Communications Security},
 	publisher = {ACM},
 	year = {2016},
-	url = {https://cypherpunks.ca/~iang/pubs/slitheen-ccs16.pdf},
+	url = {https://www.cypherpunks.ca/~iang/pubs/slitheen-ccs16.pdf},
 }
 
 @inproceedings{Nasr2016a,