diff --git a/requirements.txt b/requirements.txt
index 60efcd3..586d9de 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -219,7 +219,7 @@ tqdm @ file:///tmp/build/80754af9/tqdm_1596810128862/work
 traitlets==4.3.3
 typed-ast==1.4.1
 typing-extensions @ file:///tmp/build/80754af9/typing_extensions_1592847887441/work
-ujson==1.35
+ujson==5.4.0
 unicodecsv==0.14.1
 urllib3==1.25.9
 watchdog @ file:///C:/ci/watchdog_1593446515400/work