diff --git a/corpus/requirements.txt b/corpus/requirements.txt
index 9aba081..51bc3c5 100644
--- a/corpus/requirements.txt
+++ b/corpus/requirements.txt
@@ -45,7 +45,7 @@ textacy==0.3.4
 thinc==6.5.2
 toolz==0.8.2
 tqdm==4.11.2
-ujson==1.35
+ujson==5.4.0
 Unidecode==0.4.20
 wcwidth==0.1.7
 webencodings==0.5.1