diff --git a/2019-08-06-bob-ross-requirements.txt b/2019-08-06-bob-ross-requirements.txt
index 238fff0..964147d 100644
--- a/2019-08-06-bob-ross-requirements.txt
+++ b/2019-08-06-bob-ross-requirements.txt
@@ -30,7 +30,7 @@ mistune==0.8.4
 mizani==0.5.4
 nbconvert==5.5.0
 nbformat==4.4.0
-notebook==6.0.0
+notebook==5.7.8
 numpy==1.17.0
 palettable==3.2.0
 pandas==0.25.0
diff --git a/dgrtwo-translations/requirements-2019-04-22.txt b/dgrtwo-translations/requirements-2019-04-22.txt
index 94d090c..8dcf5f9 100644
--- a/dgrtwo-translations/requirements-2019-04-22.txt
+++ b/dgrtwo-translations/requirements-2019-04-22.txt
@@ -85,7 +85,7 @@ nbconvert==5.6.1
 nbdime==1.1.0
 nbformat==5.0.4
 -e git+git@github.com:machow/nbtabs.git@61199b91809a8f502ada774be67fc51e337d7d98#egg=nbtabs
-notebook==6.0.3
+notebook==5.7.8
 numpy==1.18.1
 packaging==19.2
 palettable==3.3.0
diff --git a/requirements.txt b/requirements.txt
index 359e86e..7c7b78c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -34,7 +34,7 @@ more-itertools==6.0.0
 nbconvert==5.4.0
 nbformat==4.4.0
 nltk==3.4
-notebook==5.7.4
+notebook==5.7.8
 numpy==1.16.0
 palettable==3.1.1
 pandas==0.24.1