diff --git a/.changeset/two-ears-cover.md b/.changeset/two-ears-cover.md
new file mode 100644
index 0000000..61daf9a
--- /dev/null
+++ b/.changeset/two-ears-cover.md
@@ -0,0 +1,5 @@
+---
+'@statelyai/sky': patch
+---
+
+Fix input
diff --git a/packages/sky-core/src/actorFromStately.ts b/packages/sky-core/src/actorFromStately.ts
index 386dca8..f84613c 100644
--- a/packages/sky-core/src/actorFromStately.ts
+++ b/packages/sky-core/src/actorFromStately.ts
@@ -24,7 +24,7 @@ export async function actorFromStately<T extends AnyStateMachine>(
     sessionId: string;
     onPlayerJoined?: ({ numberOfPlayers }: { numberOfPlayers: number }) => void;
     onPlayerLeft?: ({ numberOfPlayers }: { numberOfPlayers: number }) => void;
-    input: unknown;
+    input?: unknown;
   },
   skyConfig?: SkyConfigFile<T>,
 ): Promise<Actor<T>> {