diff --git a/app.py b/app.py
index b818740..1e99a72 100644
--- a/app.py
+++ b/app.py
@@ -9,22 +9,20 @@ app = Flask(__name__)
 activeAlarms = list()
 previousAlarms = list()
 logs = list()
+preprocessed = False
 
 def preprocess():
 
     print('start init alarms and logs')
     #versuch beide files zu laden, wenn das fehlschlägt, initiiere beide files als json
-    with open('alarms.json', 'w') as f, open('logs.json','w') as g:
-        try:
-            alarmsFile = json.load(f)
-            logsFile = json.load(g)
-        except:
-            alarmsFile = list()
-            logsFile = list()
-            json.dump(alarmsFile, f, indent=2)
-            json.dump(logsFile, g, indent=2)
-    f.close()
-    g.close()
+    try:
+        alarmsFile = json.load(open('alarms.json'))
+        logsFile = json.load(open('logs.json'))
+    except:
+        alarmsFile = list()
+        logsFile = list()
+        json.dump(alarmsFile, open('alarms.json','w'), indent=2)
+        json.dump(logsFile, open('logs.json','w'), indent=2)
     # schreib alle alarme im File in previousAlarms, wenn sie älter als 2 mins sind
     # alle anderen in active alarms
     for alarm in alarmsFile:
@@ -35,13 +33,15 @@ def preprocess():
     # lies alle log aus dem file ein
     for log in logsFile:
         logs.append(log)
+    global preprocessed
+    preprocessed = True
     print("init of alarms and logs done")
     
 @app.route("/", methods=('GET', 'POST'))
 def index():
     # wenn die logs leer sind, gehen wir davon aus, dass noch nicht initialisiert wurde
     # alarme werden gedoppelt, sollten schon welche da sein
-    if len(logs) <= 0:
+    if not preprocessed:
         preprocess()
 
     return render_template('index.html', logs = logs, alarms = activeAlarms, previousAlarms=previousAlarms)