diff --git a/environment.yml b/environment.yml
index b99b856187fb6..6f3f81d8a4d77 100644
--- a/environment.yml
+++ b/environment.yml
@@ -68,7 +68,7 @@ dependencies:
 
   # unused (required indirectly may be?)
   - ipywidgets
-  - nbformat
+  - nbformat=5.0.8
   - notebook>=5.7.5
   - pip
 
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 17ca6b8401501..f0d65104ead8e 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -42,7 +42,7 @@ pytest-instafail
 seaborn
 statsmodels
 ipywidgets
-nbformat
+nbformat==5.0.8
 notebook>=5.7.5
 pip
 blosc