diff --git a/src/jupyter_contrib_nbextensions/nbextensions/execute_time/ExecuteTime.yaml b/src/jupyter_contrib_nbextensions/nbextensions/execute_time/ExecuteTime.yaml
index c828f8dbb..bac92201d 100644
--- a/src/jupyter_contrib_nbextensions/nbextensions/execute_time/ExecuteTime.yaml
+++ b/src/jupyter_contrib_nbextensions/nbextensions/execute_time/ExecuteTime.yaml
@@ -4,7 +4,7 @@ Description: Display when each cell has been executed and how long it took
 Link: readme.md
 Icon: icon.png
 Main: ExecuteTime.js
-Compatibility: 4.x
+Compatibility: 4.x, 5.x
 Parameters:
 
 - name: ExecuteTime.display_absolute_timings
diff --git a/src/jupyter_contrib_nbextensions/nbextensions/init_cell/init_cell.yaml b/src/jupyter_contrib_nbextensions/nbextensions/init_cell/init_cell.yaml
index b82f7238b..9409a0d4b 100644
--- a/src/jupyter_contrib_nbextensions/nbextensions/init_cell/init_cell.yaml
+++ b/src/jupyter_contrib_nbextensions/nbextensions/init_cell/init_cell.yaml
@@ -1,5 +1,5 @@
-Type: IPython Notebook Extension
-Compatibility: 3.x, 4.x
+Type: Jupyter Notebook Extension
+Compatibility: 3.x, 4.x, 5.x
 Name: Initialization cells
 Main: main.js
 Icon: icon.png
@@ -11,6 +11,7 @@ Description: |
 Parameters:
 - name: init_cell.run_on_kernel_ready
   description: |
-    Run input cells whenever a kernel_ready.Kernel event is fired. See readme for further details.
+    Run input cells whenever a kernel_ready.Kernel event is fired. See readme
+    for further details.
   input_type: checkbox
   default: true
diff --git a/src/jupyter_contrib_nbextensions/nbextensions/keyboard_shortcut_editor/keyboard_shortcut_editor.yaml b/src/jupyter_contrib_nbextensions/nbextensions/keyboard_shortcut_editor/keyboard_shortcut_editor.yaml
index 0ec70bae2..587b58940 100644
--- a/src/jupyter_contrib_nbextensions/nbextensions/keyboard_shortcut_editor/keyboard_shortcut_editor.yaml
+++ b/src/jupyter_contrib_nbextensions/nbextensions/keyboard_shortcut_editor/keyboard_shortcut_editor.yaml
@@ -1,5 +1,5 @@
 Type: IPython Notebook Extension
-Compatibility: 4.x
+Compatibility: 4.x, 5.x
 Name: Keyboard shortcut editor
 Main: main.js
 Icon: icon.png
diff --git a/src/jupyter_contrib_nbextensions/nbextensions/ruler/ruler.yaml b/src/jupyter_contrib_nbextensions/nbextensions/ruler/ruler.yaml
index ca1a61b5b..818eed51b 100644
--- a/src/jupyter_contrib_nbextensions/nbextensions/ruler/ruler.yaml
+++ b/src/jupyter_contrib_nbextensions/nbextensions/ruler/ruler.yaml
@@ -4,7 +4,7 @@ Description: This extension enables the Ruler CodeMirror feature
 Link: readme.md
 Icon: icon.png
 Main: main.js
-Compatibility: 4.x
+Compatibility: 4.x, 5.x
 Parameters:
 - name: ruler_column
   input_type: list