diff --git a/requirements/dev.txt b/requirements/dev.txt
index 094334b58..d1ee481f0 100644
--- a/requirements/dev.txt
+++ b/requirements/dev.txt
@@ -2,7 +2,7 @@ chainer==3.1.0
 Keras==2.1.3
 nose==1.3.7
 numpy==1.13.3
-tensorflow==1.4.0
+tensorflow==2.5.0
 typing==3.6.1
 recommonmark==0.4.0
 Sphinx==1.5.5