diff --git a/requirements.txt b/requirements.txt
index dea6c0d..77ab217 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
 git+https://github.com/thu-ml/zhusuan.git
 git+https://github.com/haowen-xu/tfsnippet.git@v0.2.0-alpha1
 
-tensorflow==1.5
+tensorflow==2.7.2
 
 six >= 1.11.0