diff --git a/smm4h/requirements.txt b/smm4h/requirements.txt
index 45171f1..d460633 100644
--- a/smm4h/requirements.txt
+++ b/smm4h/requirements.txt
@@ -60,7 +60,7 @@ msgpack==0.6.1
 msgpack-numpy==0.4.1
 msgpack-python==0.5.6
 murmurhash==0.28.0
-nbconvert==5.3.1
+nbconvert==6.3.0
 nbformat==4.4.0
 networkx==2.1
 notebook==5.7.8