diff --git a/Formula/j/jupyterlab.rb b/Formula/j/jupyterlab.rb
index cd1606ba00fdc..002d9d0f103c9 100644
--- a/Formula/j/jupyterlab.rb
+++ b/Formula/j/jupyterlab.rb
@@ -21,6 +21,7 @@ class Jupyterlab < Formula
   end
 
   depends_on "cmake" => :build # for ipykernel
+  depends_on "ninja" => :build # for ipykernel
   depends_on "rust" => :build # for rpds-py
   depends_on "certifi"
   depends_on "libyaml"