diff --git a/requirements.txt b/requirements.txt
index b11fd49..50ce427 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@ pandas==0.24.2
 regex==2018.7.11
 requests==2.22.0
 text2digits==0.0.8
-ujson==1.35
+ujson==5.4.0
 urllib3==1.25.6
 Werkzeug==0.16.1
 xlrd==1.2.0
\ No newline at end of file