diff --git a/API/pythonCppAPI/requirements.txt b/API/pythonCppAPI/requirements.txt
old mode 100755
new mode 100644
index a0754b2d..1b9b114a
--- a/API/pythonCppAPI/requirements.txt
+++ b/API/pythonCppAPI/requirements.txt
@@ -37,7 +37,7 @@ Markdown==3.1.1
 MarkupSafe==1.1.1
 matplotlib==3.1.0
 mistune==0.8.4
-nbconvert==5.5.0
+nbconvert==6.3.0
 nbformat==4.4.0
 networkx==2.3
 notebook==5.7.8