diff --git a/Code_Paper_Figures/Supplement/S3_Fit_Algorithm/requirements.txt b/Code_Paper_Figures/Supplement/S3_Fit_Algorithm/requirements.txt
index 26d897a..f631686 100644
--- a/Code_Paper_Figures/Supplement/S3_Fit_Algorithm/requirements.txt
+++ b/Code_Paper_Figures/Supplement/S3_Fit_Algorithm/requirements.txt
@@ -50,7 +50,7 @@ matplotlib==2.2.2
 mccabe==0.6.1
 mistune==0.8.3
 multiprocess==0.70.5
-nbconvert==5.3.1
+nbconvert==6.3.0
 nbformat==4.4.0
 numexpr==2.6.5
 numpy==1.14.3