diff --git a/.changeset/runtime-handler-version-alignment.md b/.changeset/runtime-handler-version-alignment.md
new file mode 100644
index 00000000..5598b49f
--- /dev/null
+++ b/.changeset/runtime-handler-version-alignment.md
@@ -0,0 +1,7 @@
+---
+'twilio-run': patch
+---
+
+fix: align `@twilio/runtime-handler` dev dependency with the version scaffolded by `create-twilio-function`
+
+`twilio-run` depended on `@twilio/runtime-handler@^2.1.0` while `create-twilio-function` pins `^2.0.3`. The two were inconsistent, and `2.1.0` — although published to npm as `latest` — is currently rejected by the Twilio Serverless platform at deploy time (`Error 20001: No matching version found for @twilio/runtime-handler@2.1.0`). Pinning `twilio-run` to `^2.0.3` keeps the monorepo internally consistent and avoids signalling a version that cannot be deployed. See #557.
diff --git a/packages/twilio-run/package.json b/packages/twilio-run/package.json
index c07533aa..c6de7075 100644
--- a/packages/twilio-run/package.json
+++ b/packages/twilio-run/package.json
@@ -86,7 +86,7 @@
     "@ngrok/ngrok": "^1.7.0"
   },
   "devDependencies": {
-    "@twilio/runtime-handler": "^2.1.0",
+    "@twilio/runtime-handler": "^2.0.3",
     "@types/cheerio": "^0.22.12",
     "@types/common-tags": "^1.8.0",
     "@types/debug": "^4.1.4",