diff --git a/paper_fig/requirements.txt b/paper_fig/requirements.txt
index c271223..86b904a 100644
--- a/paper_fig/requirements.txt
+++ b/paper_fig/requirements.txt
@@ -110,7 +110,7 @@ tablib==0.13.0
 thinc==7.0.4
 toolz==0.9.0
 tqdm==4.32.1
-ujson==1.35
+ujson==5.2.0
 Unidecode==1.0.23
 uritemplate==3.0.0
 urllib3==1.24.3