diff --git a/bundlesize.config.json b/bundlesize.config.json
index 862ad8b91d..52a70b56a6 100644
--- a/bundlesize.config.json
+++ b/bundlesize.config.json
@@ -34,7 +34,7 @@
     },
     {
       "path": "packages/vue-instantsearch/vue2/cjs/index.js",
-      "maxSize": "20.25 kB"
+      "maxSize": "20.50 kB"
     },
     {
       "path": "packages/vue-instantsearch/vue3/cjs/index.js",
diff --git a/packages/vue-instantsearch/src/components/InstantSearch.js b/packages/vue-instantsearch/src/components/InstantSearch.js
index 8c733558c0..ad7ec32afa 100644
--- a/packages/vue-instantsearch/src/components/InstantSearch.js
+++ b/packages/vue-instantsearch/src/components/InstantSearch.js
@@ -22,7 +22,11 @@ export default createInstantSearchComponent({
     },
     indexName: {
       type: String,
-      required: true,
+      required: false,
+    },
+    compositionID: {
+      type: String,
+      required: false,
     },
     routing: {
       default: undefined,
@@ -101,6 +105,7 @@ export default createInstantSearchComponent({
         insightsClient: this.insightsClient,
         insights: this.insights,
         indexName: this.indexName,
+        compositionID: this.compositionID,
         routing: this.routing,
         stalledSearchDelay: this.stalledSearchDelay,
         searchFunction: this.searchFunction,
diff --git a/packages/vue-instantsearch/src/util/createInstantSearchComponent.js b/packages/vue-instantsearch/src/util/createInstantSearchComponent.js
index c172ceb326..5709f1e1dc 100644
--- a/packages/vue-instantsearch/src/util/createInstantSearchComponent.js
+++ b/packages/vue-instantsearch/src/util/createInstantSearchComponent.js
@@ -28,6 +28,11 @@ export const createInstantSearchComponent = (component) =>
         indexName(indexName) {
           this.instantSearchInstance.helper.setIndex(indexName || '').search();
         },
+        compositionID(compositionID) {
+          this.instantSearchInstance.helper
+            .setIndex(compositionID || '')
+            .search();
+        },
         stalledSearchDelay(stalledSearchDelay) {
           // private InstantSearch.js API:
           this.instantSearchInstance._stalledSearchDelay = stalledSearchDelay;