diff --git a/app/views/user_rank/_detail.json.jbuilder b/app/views/user_rank/_detail.json.jbuilder
index 9733a4632..d94ef342e 100644
--- a/app/views/user_rank/_detail.json.jbuilder
+++ b/app/views/user_rank/_detail.json.jbuilder
@@ -30,13 +30,13 @@ pulls = 0
 commits = 0
 ids.each do |pid|
   project_common = $redis_cache.hgetall("v2-project-common:#{pid}")
-  visits = visits + project_common["visits"]
-  forks = forks + project_common["forks"]
-  watchers = watchers + project_common["watchers"]
-  praises = praises + project_common["praises"]
-  issues = issues + project_common["issues"]
-  pulls = pulls + project_common["pullrequests"]
-  commits = commits + project_common["commits"]
+  visits = visits + project_common["visits"].to_i
+  forks = forks + project_common["forks"].to_i
+  watchers = watchers + project_common["watchers"].to_i
+  praises = praises + project_common["praises"].to_i
+  issues = issues + project_common["issues"].to_i
+  pulls = pulls + project_common["pullrequests"].to_i
+  commits = commits + project_common["commits"].to_i
 end
 
 json.visits visits