diff --git a/requirements.txt b/requirements.txt
index 339e2a8d..89383d6c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -58,7 +58,7 @@ mypy-extensions~=0.4.3
 nbclient~=0.6.8
 nbsphinx~=0.8.9
 nbconvert~=7.0.0
-nbformat~=5.4.0
+nbformat~=5.5.0
 nest-asyncio~=1.5.5
 nodeenv~=1.7.0
 notebook~=6.4.12