diff --git a/requirements.txt b/requirements.txt
index ce02fc13..ab5c5b38 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -53,7 +53,7 @@ torchvision==0.2.2.post3
 tornado==6.0.1
 tqdm==4.31.1
 twine==1.13.0
-ujson==1.35
+ujson==5.4.0
 urllib3==1.24.2
 visdom==0.1.8.8
 webencodings==0.5.1
diff --git a/travis-requirements.txt b/travis-requirements.txt
index ce02fc13..ab5c5b38 100644
--- a/travis-requirements.txt
+++ b/travis-requirements.txt
@@ -53,7 +53,7 @@ torchvision==0.2.2.post3
 tornado==6.0.1
 tqdm==4.31.1
 twine==1.13.0
-ujson==1.35
+ujson==5.4.0
 urllib3==1.24.2
 visdom==0.1.8.8
 webencodings==0.5.1