diff --git a/requirements.txt b/requirements.txt
index 0c934f7..e6ca444 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 torchtext==0.4.0
-ujson==1.35
+ujson==5.2.0
 seqeval==0.0.12
 six==1.12.0
 jieba==0.39