diff --git a/requirements.txt b/requirements.txt
index 8c8c6fd140a364f25ecdcb7986397e3312e0aa98..32de2336e9f70640436661c49bb83a996652ccb4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,8 +1,8 @@
 jupyter_client
-ipython
+ipython<7.22
 ipykernel
 pathlib
-nbconvert
+nbconvert<6.0
 plotly
 matplotlib
 scipy