diff --git a/serving/client_requirements.txt b/serving/client_requirements.txt
old mode 100755
new mode 100644
index 608f2d8..973fdac
--- a/serving/client_requirements.txt
+++ b/serving/client_requirements.txt
@@ -37,7 +37,7 @@ MarkupSafe==1.0
 matplotlib==2.2.2
 mistune==0.8.3
 mock==2.0.0
-nbconvert==5.3.1
+nbconvert==6.5.1
 nbformat==4.4.0
 notebook==5.5.0
 numpy==1.14.3