diff --git a/papers/SubTagger/requirements_pip.txt b/papers/SubTagger/requirements_pip.txt
index 768947c..631c137 100644
--- a/papers/SubTagger/requirements_pip.txt
+++ b/papers/SubTagger/requirements_pip.txt
@@ -130,7 +130,7 @@ torchvision==0.3.0
 tornado==6.0.2
 tqdm==4.32.2
 traitlets==4.3.2
-ujson==1.35
+ujson==5.2.0
 Unidecode==1.1.0
 urllib3==1.25.3
 wasabi==0.2.2