diff --git a/9-serving/requirements.txt b/9-serving/requirements.txt
index b9ef7e2..320a46e 100644
--- a/9-serving/requirements.txt
+++ b/9-serving/requirements.txt
@@ -2,5 +2,5 @@ grpc==0.3.post19
 numpy==1.14.0
 Pillow==5.0.0
 python-mnist==0.5
-tensorflow==1.5.0
+tensorflow==1.15.4
 tensorflow-serving-api==1.4.0