diff --git a/pin.run b/pin.run
index 556deb0..636fc77 100755
--- a/pin.run
+++ b/pin.run
@@ -10,6 +10,8 @@ locale.setlocale(locale.LC_TIME, "de_DE.utf8")
 
 origin_url = "https://augustiner-kantorei.de/pinnwand"
 database = "db.cfg"
+MAX_DATABASEFILESIZE= 100 * 1024 * 1024 # 100 MiB
+MAX_ARGUMENTLENGTH = 200   # characters
 
 def get_arguments():
     """Wrapper for cgi-environment.
@@ -26,13 +28,13 @@ def get_arguments():
 args = get_arguments()
 
 oversize=False
-if os.path.getsize(database) < 100 * 1024 * 1024:
+if os.path.getsize(database) < MAX_DATABASEFILESIZE:
     # only add entries if file size does not exceed 100 MiB
 
     if "ort" in args and "name" in args and "comment" in args:
 
         # fail if input is too long
-        if max(map(len, list(args[i] for i in args))) > 200:
+        if max(map(len, list(args[i] for i in args))) > MAX_ARGUMENTLENGTH:
             # overlong input is a clear indication someone is fiddling with the interface
             # this deserves no proper exit message
             exit()
@@ -40,9 +42,6 @@ if os.path.getsize(database) < 100 * 1024 * 1024:
         # add entry
         try:
             zeit = datetime.timestamp(datetime(int(args["year"]), int(args["month"]), int(args["day"]), int(args["hour"]), int(args["minute"])))
-        except:
-            exit()
-        try:
             with open(database, "a") as f:
                 f.write("\t".join(
                     [
@@ -54,7 +53,8 @@ if os.path.getsize(database) < 100 * 1024 * 1024:
                     ]
                     ))
                 f.write("\n")
-        except Exception as e:
+        except:
+            # an exception here stems most likely from strange arguments and indicates fiddling. no mercy.
             exit()
 else:
     oversize = True
@@ -192,9 +192,9 @@ else:
     <option>55</option>
     </select>
     &nbsp; Zeitpunkt (Tag. Monat. Jahr  Stunde:Minute) <br>
-    <input type="text" name="ort" placeholder="Treffpunkt" maxlength=30/> &nbsp;Treffpunkt<br />
-    <input type="text" name="name" placeholder="Name" maxlength=30/> &nbsp;Name<br />
-    <input type="text" name="comment" placeholder="Bemerkung" maxlength=130/> &nbsp;Bemerkung<br />
+    <input type="text" name="ort" placeholder="Treffpunkt" maxlength="30" /> &nbsp;Treffpunkt<br />
+    <input type="text" name="name" placeholder="Name" maxlength="30" /> &nbsp;Name<br />
+    <input type="text" name="comment" placeholder="Bemerkung" maxlength="130" /> &nbsp;Bemerkung<br />
     <input type="submit" name="Absenden" value="Absenden" />
  </form>
 """)