diff --git a/requirements_dev.txt b/requirements_dev.txt
index f31bacf..c2b774c 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -14,4 +14,4 @@ tox-conda>=0.9.2
 recommonmark>=0.7.1
 black==22.1.0
 jupyter
-jupyter_contrib_nbextensions
\ No newline at end of file
+jupyter_contrib_nbextensions==0.7.0
\ No newline at end of file