diff --git a/src/plugins/experiment.client.js b/src/plugins/experiment.client.js
index 103985f8b..d585a05f5 100644
--- a/src/plugins/experiment.client.js
+++ b/src/plugins/experiment.client.js
@@ -6,12 +6,17 @@ export default ({ app }) => {
     const { experimentID, $variantIndexes } = app.$exp;
     if (!experimentID || !$variantIndexes || !$variantIndexes.length) return;
     if (app.$gtag && window && window.gtag) {
-      app.$gtag.set({
-        experiments: [{ id: experimentID, variant: $variantIndexes.join('-') }],
-      });
-      app.$gtag.event('experiment_impression', {
-        experiment_id: experimentID,
-        variant_id: `${experimentID}.${$variantIndexes.join('-')}`,
+      setImmediate(() => {
+        // HACK: Wait for gtag config GTM ID before sending exp
+        app.$gtag.set({
+          experiments: [
+            { id: experimentID, variant: $variantIndexes.join('-') },
+          ],
+        });
+        app.$gtag.event('experiment_impression', {
+          experiment_id: experimentID,
+          variant_id: `${experimentID}.${$variantIndexes.join('-')}`,
+        });
       });
     }
   }