diff --git a/app/services/projects/elasticsearch_service.rb b/app/services/projects/elasticsearch_service.rb
index 24d57cfa2..2156f5e76 100644
--- a/app/services/projects/elasticsearch_service.rb
+++ b/app/services/projects/elasticsearch_service.rb
@@ -7,7 +7,7 @@ class Projects::ElasticsearchService < ApplicationService
 
   def call
     domain = EduSetting.get("search_api_url") || "https://statistics.gitlink.org.cn"
-    api_url = "#{domain}/search?page=1&size=1000&term=#{@keyword}&type=1"
+    api_url = URI.encode("#{domain}/search?page=1&size=1000&term=#{@keyword}&type=1")
     response = Faraday.get(api_url)
     result = JSON.parse(response&.body)
     project_ids = result['data']['rows'].map{|d|d['instanceId']}