diff --git a/app/controllers/execution_environments_controller.rb b/app/controllers/execution_environments_controller.rb
index 89470996..c220ae74 100644
--- a/app/controllers/execution_environments_controller.rb
+++ b/app/controllers/execution_environments_controller.rb
@@ -40,7 +40,7 @@ class ExecutionEnvironmentsController < ApplicationController
       FROM
         (SELECT user_id,
                 exercise_id,
-                CASE WHEN working_time >= '0:30:00' THEN '0' ELSE working_time END AS working_time_new
+                CASE WHEN working_time >= '0:05:00' THEN '0' ELSE working_time END AS working_time_new
          FROM
             (SELECT user_id,
                     exercise_id,
diff --git a/app/controllers/external_users_controller.rb b/app/controllers/external_users_controller.rb
index 5c6619cb..22d70988 100644
--- a/app/controllers/external_users_controller.rb
+++ b/app/controllers/external_users_controller.rb
@@ -27,7 +27,7 @@ class ExternalUsersController < ApplicationController
               score,
               id,
               CASE
-                  WHEN working_time >= '0:30:00' THEN '0'
+                  WHEN working_time >= '0:05:00' THEN '0'
                   ELSE working_time
               END AS working_time_new
        FROM
diff --git a/app/models/exercise.rb b/app/models/exercise.rb
index d3025bed..58d328ae 100644
--- a/app/models/exercise.rb
+++ b/app/models/exercise.rb
@@ -67,7 +67,7 @@ class Exercise < ActiveRecord::Base
              sum(working_time_new) AS working_time
       FROM
         (SELECT user_id,
-                CASE WHEN working_time >= '0:30:00' THEN '0' ELSE working_time END AS working_time_new
+                CASE WHEN working_time >= '0:05:00' THEN '0' ELSE working_time END AS working_time_new
          FROM
             (SELECT user_id,
                     id,
@@ -169,7 +169,7 @@ class Exercise < ActiveRecord::Base
                     exercise_id,
                     max_score,
                     CASE
-                           WHEN working_time >= '0:30:00' THEN '0'
+                           WHEN working_time >= '0:05:00' THEN '0'
                            ELSE working_time
                     END AS working_time_new
              FROM   all_working_times_until_max ), result AS
@@ -263,7 +263,7 @@ class Exercise < ActiveRecord::Base
 
         FILTERED_TIMES_UNTIL_MAX AS
         (
-        SELECT user_id,exercise_id, max_score, CASE WHEN working_time >= '0:30:00' THEN '0' ELSE working_time END AS working_time_new
+        SELECT user_id,exercise_id, max_score, CASE WHEN working_time >= '0:05:00' THEN '0' ELSE working_time END AS working_time_new
         FROM ALL_WORKING_TIMES_UNTIL_MAX
         )
             SELECT e.external_id AS external_user_id, f.user_id, exercise_id, MAX(max_score) AS max_score, sum(working_time_new) AS working_time