diff --git a/requirements.txt b/requirements.txt
index f8ea3d9..4f89cc8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -74,7 +74,7 @@ sphinx-rtd-theme==0.4.2
 sphinxcontrib-websupport==1.1.0
 SQLAlchemy==1.3.0
 tqdm==4.31.1
-ujson==1.35
+ujson==5.4.0
 umap-learn==0.3.10
 urllib3==1.24.2
 vine==1.1.4