diff --git a/header.tpl b/header.tpl
index f3c5333..f89c53b 100644
--- a/header.tpl
+++ b/header.tpl
@@ -181,7 +181,7 @@
       <div class="menu-item">
         <img class="top-icon" src="img/update-icon.svg" alt="update icon"/>
         <a
-        href="https://github.com/NullHypothesis/censorbib/commits/master">Last update: 2021-11-8</a>
+        href="https://github.com/NullHypothesis/censorbib/commits/master">Last update: 2022-02-08</a>
       </div>
       <div class="menu-item">
         <img class="top-icon" src="img/donate-icon.svg" alt="donate icon"/>
diff --git a/references.bib b/references.bib
index 60beef1..e8821a7 100644
--- a/references.bib
+++ b/references.bib
@@ -1,3 +1,12 @@
+@inproceedings{Rambert2021a,
+	author = {Raymond Rambert and Zachary Weinberg and Diogo Barradas and Nicolas Christin},
+	title = {{Chinese} Wall or {Swiss} Cheese? Keyword filtering in the {Great Firewall} of {China}},
+	booktitle = {WWW},
+	publisher = {ACM},
+	year = {2021},
+	url = {https://censorbib.nymity.ch/pdf/Rambert2021a.pdf},
+}
+
 @article{Chang2022a,
 	author = {Keng-Chi Chang and William R. Hobbs and Margaret E. Roberts and Zachary C. Steinert-Threlkeld},
 	title = {{COVID-19} increased censorship circumvention and access to sensitive topics in {China}},