diff --git a/problem/views/oj.py b/problem/views/oj.py
index 43808d9..d360858 100644
--- a/problem/views/oj.py
+++ b/problem/views/oj.py
@@ -165,14 +165,14 @@ class ProblemSolvedPeopleCount(APIView):
         if submission_count == 0:
             return self.success("0%")
         today = datetime.today()
-        oneYearAge = datetime(today.year - 1, today.month, today.day, 0, 0)
+        twoYearAge = datetime(today.year - 2, today.month, today.day, 0, 0)
         total_count = User.objects.filter(
-            is_disabled=False, last_login__gte=oneYearAge
+            is_disabled=False, last_login__gte=twoYearAge
         ).count()
         accepted_count = Submission.objects.filter(
             problem_id=problem_id,
             result=JudgeStatus.ACCEPTED,
-            create_time__gte=oneYearAge,
+            create_time__gte=twoYearAge,
         ).aggregate(user_count=Count("user_id", distinct=True))["user_count"]
         if accepted_count < total_count:
             rate = "%.2f" % ((total_count - accepted_count) / total_count * 100)