diff --git a/types.ts b/types.ts
index 297dced..ded9656 100644
--- a/types.ts
+++ b/types.ts
@@ -19,7 +19,7 @@ export namespace ExpectedExports {
     [id: string]: (
       effects: Effects,
       dateMs: number,
-    ) => Promise<ResultType<null | void>>;
+    ) => Promise<ResultType<unknown>>;
   };
   export type migration = (
     effects: Effects,
@@ -37,7 +37,7 @@ export namespace ExpectedExports {
    * This is the entrypoint for the main container. Used to start up something like the service that the
    * package represents, like running a bitcoind in a bitcoind-wrapper.
    */
-  export type main = (effects: Effects) => Promise<ResultType<null | void>>;
+  export type main = (effects: Effects) => Promise<ResultType<unknown>>;
 }
 
 /** Used to reach out from the pure js runtime */