diff --git a/app/services/api/v1/projects/contributors/stat_service.rb b/app/services/api/v1/projects/contributors/stat_service.rb
index 9a4e88105..ab20dd657 100644
--- a/app/services/api/v1/projects/contributors/stat_service.rb
+++ b/app/services/api/v1/projects/contributors/stat_service.rb
@@ -6,7 +6,7 @@ class Api::V1::Projects::Contributors::StatService < ApplicationService
   def initialize(project, params, token=nil) 
     @project = project 
     @branch = params[:branch] 
-    @pass_year = params[:pass_year] 
+    @pass_year = params[:pass_year] || 3
     @page = params[:page] || 1
     @limit = params[:limit] || 15
     @owner = project&.owner.login
@@ -26,7 +26,7 @@ class Api::V1::Projects::Contributors::StatService < ApplicationService
       access_token: token, page: page, limit: limit
     }
     param.merge!(branch: branch) if branch.present?
-    param.merge!(pass_year: pass_year) if pass_year.present?
+    param.merge!(pass_year: @pass_year)
 
     param
   end