diff --git a/requirements_py27_dev.txt b/requirements_py27_dev.txt
index 1a293f4..89e1f8b 100644
--- a/requirements_py27_dev.txt
+++ b/requirements_py27_dev.txt
@@ -41,7 +41,7 @@ lxml==3.7.2
 MarkupSafe==0.23
 mccabe==0.6.0
 mistune==0.7.3
-nbconvert==5.1.1
+nbconvert==6.3.0
 nbformat==4.2.0
 networkx==1.11
 nose==1.3.7
diff --git a/requirements_py3_dev.txt b/requirements_py3_dev.txt
index d1c99f0..c0daa7e 100644
--- a/requirements_py3_dev.txt
+++ b/requirements_py3_dev.txt
@@ -38,7 +38,7 @@ lxml==3.7.2
 MarkupSafe==0.23
 mccabe==0.6.0
 mistune==0.7.3
-nbconvert==5.1.1
+nbconvert==6.3.0
 nbformat==4.2.0
 networkx==1.11
 nose==1.3.7