diff --git a/app/main.py b/app/main.py
index c2129d4..9e78216 100644
--- a/app/main.py
+++ b/app/main.py
@@ -99,6 +99,7 @@ def get_today_article(user_word_list, articleID):
         rq.instructions('SELECT * FROM article WHERE article_id=%d' % (articleID))
     rq.do()
     result = rq.get_results()
+    random.shuffle(result)
     
     # Choose article according to reader's level
     d1 = load_freq_history(path_prefix + 'static/frequency/frequency.p')
@@ -114,8 +115,7 @@ def get_today_article(user_word_list, articleID):
     if articleID == None:
         for reading in result:
             text_level = text_difficulty_level(reading['text'], d3)
-            #print('TEXT_LEVEL %4.2f' % (text_level))
-            if within_range(text_level, user_level, (8.0 - user_level)*0.1):
+            if within_range(text_level, user_level, (8.0 - user_level)*0.8):
                 d = reading
                 break
             
diff --git a/build.sh b/build.sh
index 9ac3f1a..89d6543 100755
--- a/build.sh
+++ b/build.sh
@@ -10,7 +10,7 @@ sudo docker rm EnglishPal
 sudo docker build -t englishpal .
 
 # Run the application
-sudo docker run -d --name EnglishPal -p 90:80 -v /home/lanhui/englishpal/app/static/frequency:/app/static/frequency -t englishpal  # for permanently saving data
+sudo docker run -d --name EnglishPal -p 90:80 -v /home/lanhui/englishpal/app/static/frequency:/app/static/frequency -v /home/lanhui/englishpal/app/static/:/app/static/ -t englishpal  # for permanently saving data
 
 # Save space.  Run it after sudo docker run
 sudo docker system prune -a -f