diff --git a/docs/requirements.txt b/docs/requirements.txt
index fd7a687..85b530f 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -65,7 +65,7 @@ termcolor==1.1.0
 thinc==6.10.2
 toolz==0.9.0
 tqdm==4.23.1
-ujson==1.35
+ujson==5.4.0
 urllib3==1.22
 wordcloud==1.4.1
 wrapt==1.10.11