diff --git a/docs_rtd/requirements.txt b/docs_rtd/requirements.txt
index 5b3a1b843d76..ff052bec0d53 100644
--- a/docs_rtd/requirements.txt
+++ b/docs_rtd/requirements.txt
@@ -40,7 +40,7 @@ MarkupSafe==1.1.1
 mistune==0.8.4
 nbconvert==5.6.1
 nbformat==5.0.7
-notebook==6.1.5
+notebook==6.4.1
 numpy==1.19.1
 packaging==20.4
 pandas==1.0.5