diff --git a/requirements_py27_dev.txt b/requirements_py27_dev.txt
index 1a293f4..4fbfa68 100644
--- a/requirements_py27_dev.txt
+++ b/requirements_py27_dev.txt
@@ -45,7 +45,7 @@ nbconvert==5.1.1
 nbformat==4.2.0
 networkx==1.11
 nose==1.3.7
-notebook==4.3.1
+notebook==6.4.12
 numpy==1.12.0
 packaging==16.8
 pandocfilters==1.4.1
diff --git a/requirements_py3_dev.txt b/requirements_py3_dev.txt
index d1c99f0..28cb859 100644
--- a/requirements_py3_dev.txt
+++ b/requirements_py3_dev.txt
@@ -42,7 +42,7 @@ nbconvert==5.1.1
 nbformat==4.2.0
 networkx==1.11
 nose==1.3.7
-notebook==4.3.1
+notebook==6.4.12
 numpy==1.12.0
 packaging==16.8
 pandocfilters==1.4.1