diff --git a/deployments/biology/image/environment.yml b/deployments/biology/image/environment.yml
index b9a293752..93b675643 100644
--- a/deployments/biology/image/environment.yml
+++ b/deployments/biology/image/environment.yml
@@ -66,3 +66,4 @@ dependencies:
 # Packages for MCB-160L iss #3942
   - allensdk==2.13.6
   - otter-grader==3.1.4
+  - notebook==6.5.6
diff --git a/deployments/data8/image/environment.yml b/deployments/data8/image/environment.yml
index adbaecca6..ff9ed3fa5 100644
--- a/deployments/data8/image/environment.yml
+++ b/deployments/data8/image/environment.yml
@@ -25,3 +25,4 @@ dependencies:
   - okpy==1.18.1
   - datascience==0.17.0
   - otter-grader==4.3.4 # Based on request from ericvd and sean.morris
+  - notebook==6.5.6
diff --git a/deployments/datahub/images/default/environment.yml b/deployments/datahub/images/default/environment.yml
index c8d7d4f57..54f03225d 100644
--- a/deployments/datahub/images/default/environment.yml
+++ b/deployments/datahub/images/default/environment.yml
@@ -304,3 +304,4 @@ dependencies:
 
   # Used by MCB32, but incompatible with ipywidgets 8.x
   - qgrid==1.3.1
+  - notebook==6.5.6
diff --git a/deployments/dev-r/images/default/environment.yml b/deployments/dev-r/images/default/environment.yml
index 0009398a9..28a081302 100644
--- a/deployments/dev-r/images/default/environment.yml
+++ b/deployments/dev-r/images/default/environment.yml
@@ -17,3 +17,4 @@ dependencies:
 - pip:
   - -r infra-requirements.txt
   - jupyter-shiny-proxy==1.1
+  - notebook==6.5.6
diff --git a/deployments/dev-r/images/secondary/environment.yml b/deployments/dev-r/images/secondary/environment.yml
index 9f5511cd2..e80184105 100644
--- a/deployments/dev-r/images/secondary/environment.yml
+++ b/deployments/dev-r/images/secondary/environment.yml
@@ -15,3 +15,4 @@ dependencies:
 - pip:
   - -r infra-requirements.txt
   - jupyter-shiny-proxy==1.1
+  - notebook==6.5.6