diff --git a/packages/light.js/package.json b/packages/light.js/package.json
index cec927a6..0a01f87d 100644
--- a/packages/light.js/package.json
+++ b/packages/light.js/package.json
@@ -1,7 +1,7 @@
 {
   "name": "@parity/light.js",
   "description": "A high-level reactive JS library optimized for light clients",
-  "version": "1.0.8",
+  "version": "1.0.9",
   "author": "Parity Team <admin@parity.io>",
   "license": "MIT",
   "repository": "https://github.com/paritytech/js-libs/tree/master/packages/light.js",
diff --git a/packages/light.js/src/frequency/blocks.ts b/packages/light.js/src/frequency/blocks.ts
index dc96022e..5fbe7e02 100644
--- a/packages/light.js/src/frequency/blocks.ts
+++ b/packages/light.js/src/frequency/blocks.ts
@@ -20,10 +20,10 @@ import { onSyncingChanged$ } from './health';
  */
 const onEveryBlockWithApi$ = memoizee(
   (api: any, options: FrequencyObservableOptions) =>
-    onSyncingChanged$(options).pipe(
-      filter((isSyncing: boolean) => isSyncing === false),
-      withLatestFrom(createPubsubObservable('eth_blockNumber', options)),
-      map(([_, blockNumber]) => blockNumber)
+    createPubsubObservable('eth_blockNumber', options).pipe(
+      withLatestFrom(onSyncingChanged$(options)),
+      filter(([_, isSyncing]) => isSyncing === false),
+      map(([blockNumber]) => blockNumber)
     ) as Observable<BigNumber>,
   { length: 1 } // Only memoize by api
 );