diff --git a/overview/bibliography.bib b/overview/bibliography.bib
index 9f912dd..fb5038e 100644
--- a/overview/bibliography.bib
+++ b/overview/bibliography.bib
@@ -87,7 +87,7 @@ @misc{IntelSGXTutorial
   author = {John M. and Benjamin O.},
   title = {Intel® Software Guard Extensions Tutorial Series: Part 1, Intel® SGX 
            Foundation},
-  url = {https://software.intel.com/en-us/articles/intel-software-guard-extensions-tutorial-part-1-foundation}
+  url = {https://software.intel.com/en-us/articles/intel-software-guard-extensions-tutorial-part-1-foundation},
   year = 2016,
   month = 7,
   publisher = {Intel Developer Zone},