diff --git a/.changeset/gorgeous-pots-talk.md b/.changeset/gorgeous-pots-talk.md
new file mode 100644
index 0000000..bab6e6d
--- /dev/null
+++ b/.changeset/gorgeous-pots-talk.md
@@ -0,0 +1,5 @@
+---
+'create-pylon': patch
+---
+
+Prevent error on unkown pm during run script detection.
diff --git a/packages/create-pylon/src/detect-pm.ts b/packages/create-pylon/src/detect-pm.ts
index 1c1c86a..36dc028 100644
--- a/packages/create-pylon/src/detect-pm.ts
+++ b/packages/create-pylon/src/detect-pm.ts
@@ -140,6 +140,7 @@ export function getRunScript(pm: PackageManager): PackageManagerScript {
     case 'deno':
       return 'deno task'
     default:
-      throw new Error('Unknown package manager')
+      // Default to npm run if unknown
+      return 'npm run'
   }
 }