diff --git a/util/state.js b/util/state.js
index 39ffe5ba..abe9fbe6 100644
--- a/util/state.js
+++ b/util/state.js
@@ -188,12 +188,12 @@ return 0;
 
   async setStartTime() {
     const startTime = this._timestamp();
-    return await this.redis.rpush(this.startkey, startTime);
+    return await this.redis.rpush(`this.startkey:${this.uid}`, startTime);
   }
 
   async setEndTime() {
     const endTime = this._timestamp();
-    return await this.redis.rpush(this.endkey, endTime);
+    return await this.redis.rpush(`this.endkey:${this.uid}`, endTime);
   }
 
   async markStarted(url) {