diff --git a/cps/epub.py b/cps/epub.py
index b800250d..9d3cefd6 100644
--- a/cps/epub.py
+++ b/cps/epub.py
@@ -44,7 +44,7 @@ def get_epub_info(tmp_file_path, original_file_name, original_file_extension):
     try:#maybe description isn't present
         comments = tree.xpath("//*[local-name() = 'description']/text()")[0]
         epub_metadata['comments'] = comments
-    except:
+    except IndexError as e:
         epub_metadata['comments'] = ""
 
     for s in ['title', 'description', 'creator']:
@@ -64,7 +64,7 @@ def get_epub_info(tmp_file_path, original_file_name, original_file_extension):
             epub_metadata['languages'] = isoLanguages.get(part3=lang).name
         else:
             epub_metadata['languages'] = ""
-    except:
+    except IndexError as e:
         epub_metadata['languages'] = ""
 
     coversection = tree.xpath("/pkg:package/pkg:manifest/pkg:item[@id='cover-image']/@href", namespaces=ns)
diff --git a/cps/fb2.py b/cps/fb2.py
index aa004b10..8e3e39b8 100644
--- a/cps/fb2.py
+++ b/cps/fb2.py
@@ -5,9 +5,9 @@ from lxml import etree
 import os
 import uploader
 try:
-    import StringIO
-except:
     from io import StringIO
+except ImportError as e:
+    import StringIO
 
 def get_fb2_info(tmp_file_path, original_file_extension):
 
diff --git a/cps/helper.py b/cps/helper.py
index 35ba0375..7018b48c 100755
--- a/cps/helper.py
+++ b/cps/helper.py
@@ -14,15 +14,15 @@ import traceback
 import re
 import unicodedata
 try:
-    from StringIO import StringIO
-    from email.MIMEBase import MIMEBase
-    from email.MIMEMultipart import MIMEMultipart
-    from email.MIMEText import MIMEText
-except ImportError:
     from io import StringIO
     from email.mime.base import MIMEBase
     from email.mime.multipart import MIMEMultipart
     from email.mime.text import MIMEText
+except ImportError as e:
+    from StringIO import StringIO
+    from email.MIMEBase import MIMEBase
+    from email.MIMEMultipart import MIMEMultipart
+    from email.MIMEText import MIMEText
 from email import encoders
 from email.generator import Generator
 from email.utils import formatdate
@@ -247,8 +247,9 @@ def get_valid_filename(value, replace_whitespace=True):
         re_slugify = re.compile('[\W\s-]', re.UNICODE)
         try:
             value = str(re_slugify.sub('', value).strip())
-        except: #will exception on Python2.7
+        except UnicodeEncodeError as e: #will exception on Python2.7
             value = unicode(re_slugify.sub('', value).strip())
+            raise
     if replace_whitespace:
         #*+:\"/<>? werden durch _ ersetzt
         value = re.sub('[\*\+:\\\"/<>\?]+', u'_', value, flags=re.U)
diff --git a/cps/web.py b/cps/web.py
index 50243845..b9f69c5d 100755
--- a/cps/web.py
+++ b/cps/web.py
@@ -53,7 +53,7 @@ try:
     from urllib.parse import quote   
     from imp import reload
     from past.builtins import xrange
-except:
+except ImportError as e:
     from urllib import quote
 
 try: