diff --git a/.changeset/dull-spoons-doubt.md b/.changeset/dull-spoons-doubt.md
new file mode 100644
index 0000000000..533a1ea38f
--- /dev/null
+++ b/.changeset/dull-spoons-doubt.md
@@ -0,0 +1,11 @@
+---
+'@backstage/create-app': patch
+---
+
+Removed usage of the deprecated `diff` command in the root `package.json`.
+
+To make this change in an existing app, make the following change in the root `package.json`:
+
+```diff
+-    "diff": "lerna run diff --",
+```
diff --git a/packages/create-app/templates/default-app/package.json.hbs b/packages/create-app/templates/default-app/package.json.hbs
index 9e20ebfa64..a4f8815822 100644
--- a/packages/create-app/templates/default-app/package.json.hbs
+++ b/packages/create-app/templates/default-app/package.json.hbs
@@ -14,7 +14,6 @@
     "tsc": "tsc",
     "tsc:full": "tsc --skipLibCheck false --incremental false",
     "clean": "backstage-cli repo clean",
-    "diff": "lerna run diff --",
     "test": "backstage-cli test",
     "test:all": "lerna run test -- --coverage",
     "lint": "backstage-cli repo lint --since origin/master",