diff --git a/Changelog.txt b/Changelog.txt
index 385f345..dd5276e 100644
--- a/Changelog.txt
+++ b/Changelog.txt
@@ -1,5 +1,6 @@
 * 2017-10-31
 	- Updated paper ``Games Without Frontiers: Investigating Video Games as a Covert Channel''
+	- Updated paper ``Tweeting Under Pressure: Analyzing Trending Topics and Evolving Word Choice on Sina Weibo''
 
 * 2017-10-30
 	- Updated paper ``StegoTorus: A Camouflage Proxy for the Tor Anonymity System''
diff --git a/references.bib b/references.bib
index 1758b1e..ba3968e 100644
--- a/references.bib
+++ b/references.bib
@@ -791,7 +791,7 @@
 	booktitle = {Conference on Online Social Networks},
 	publisher = {ACM},
 	year = {2013},
-	url = {http://www.ccs.neu.edu/home/cbw/pdf/weibo-cosn13.pdf},
+	url = {https://cbw.sh/static/pdf/weibo-cosn13.pdf},
 }
 
 @inproceedings{Clayton2006a,