diff --git a/open-lessons/decorators.15.02.2022/requirements.txt b/open-lessons/decorators.15.02.2022/requirements.txt
index 1464ed9f..de5e0660 100644
--- a/open-lessons/decorators.15.02.2022/requirements.txt
+++ b/open-lessons/decorators.15.02.2022/requirements.txt
@@ -27,7 +27,7 @@ matplotlib-inline==0.1.3
 mistune==0.8.4
 mypy-extensions==0.4.3
 nbclient==0.5.11
-nbconvert==6.4.2
+nbconvert==6.5.1
 nbformat==5.1.3
 nest-asyncio==1.5.4
 notebook==6.4.8