diff --git a/src/agent.ts b/src/agent.ts
index 64c946f..517a315 100644
--- a/src/agent.ts
+++ b/src/agent.ts
@@ -799,7 +799,11 @@ But unfortunately, you failed to solve the issue. You need to think out of the b
   console.log(thisStep)
 
   await storeContext(system, schema, [allContext, allKeywords, allQuestions, allKnowledge], totalStep);
-  return {result: thisStep, context, visitedURLs: [...visitedURLs, ...Object.keys(allURLs)]};
+  return {
+    result: thisStep,
+    context,
+    visitedURLs: [...new Set([...visitedURLs, ...Object.keys(allURLs)])]
+  };
 
 }