diff --git a/app/logical/pixiv_web_agent.rb b/app/logical/pixiv_web_agent.rb
index ed51e60c7..1266ebec4 100644
--- a/app/logical/pixiv_web_agent.rb
+++ b/app/logical/pixiv_web_agent.rb
@@ -10,6 +10,8 @@ class PixivWebAgent
 
   def self.build
     mech = Mechanize.new
+    mech.keep_alive = false
+
     phpsessid = Cache.get(SESSION_CACHE_KEY)
     comicsessid = Cache.get(COMIC_SESSION_CACHE_KEY)
 
diff --git a/app/logical/sources/strategies/nico_seiga.rb b/app/logical/sources/strategies/nico_seiga.rb
index 51018726f..238c42cd2 100644
--- a/app/logical/sources/strategies/nico_seiga.rb
+++ b/app/logical/sources/strategies/nico_seiga.rb
@@ -131,6 +131,7 @@ module Sources
       def agent
         @agent ||= begin
           mech = Mechanize.new
+          mech.keep_alive = false
 
           session = Cache.get("nico-seiga-session")
           if session