diff --git a/req.txt b/req.txt
index b0add3d..aea488d 100644
--- a/req.txt
+++ b/req.txt
@@ -20,7 +20,7 @@ MarkupSafe==1.0
 matplotlib==2.2.3
 mistune==0.8.3
 mpld3==0.3
-nbconvert==5.3.1
+nbconvert==6.3.0
 nbformat==4.4.0
 notebook==5.6.0
 numpy==1.15.1
diff --git a/requirements.txt b/requirements.txt
index 8fab704..87ca724 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -19,7 +19,7 @@ kiwisolver==1.0.1
 MarkupSafe==1.0
 matplotlib==2.2.3
 mistune==0.8.3
-nbconvert==5.3.1
+nbconvert==6.3.0
 nbformat==4.4.0
 notebook==5.6.0
 numpy==1.15.1