diff --git a/plugins/CryptMessage/CryptMessagePlugin.py b/plugins/CryptMessage/CryptMessagePlugin.py
index 0302c83a..71499eca 100644
--- a/plugins/CryptMessage/CryptMessagePlugin.py
+++ b/plugins/CryptMessage/CryptMessagePlugin.py
@@ -53,7 +53,7 @@ class UiWebsocketPlugin(object):
             try:
                 text = self.decrypt(encrypted_text.decode("base64"), privatekey)
                 texts.append(text)
-            except Exception, err:
+            except Exception as err:
                 texts.append(None)
 
         if type(param) == list:
diff --git a/plugins/FilePack/FilePackPlugin.py b/plugins/FilePack/FilePackPlugin.py
index 7ba6b452..08725960 100644
--- a/plugins/FilePack/FilePackPlugin.py
+++ b/plugins/FilePack/FilePackPlugin.py
@@ -59,7 +59,7 @@ class UiRequestPlugin(object):
                 content_type = self.getContentType(file_path)
                 self.sendHeader(200, content_type=content_type, noscript=kwargs.get("header_noscript", False))
                 return self.streamFile(file)
-            except Exception, err:
+            except Exception as err:
                 self.log.debug("Error opening archive file: %s" % err)
                 return self.error404(path)
 
diff --git a/plugins/Mute/MutePlugin.py b/plugins/Mute/MutePlugin.py
index e1d6fb05..e30a6c38 100644
--- a/plugins/Mute/MutePlugin.py
+++ b/plugins/Mute/MutePlugin.py
@@ -14,7 +14,7 @@ if os.path.isfile("%s/mutes.json" % config.data_dir):
         data = json.load(open("%s/mutes.json" % config.data_dir))
         mutes = data.get("mutes", {})
         site_blacklist = data.get("site_blacklist", {})
-    except Exception, err:
+    except Exception as err:
         mutes = {}
         site_blacklist = {}
 else:
diff --git a/plugins/Newsfeed/NewsfeedPlugin.py b/plugins/Newsfeed/NewsfeedPlugin.py
index feaf8542..949e62b6 100644
--- a/plugins/Newsfeed/NewsfeedPlugin.py
+++ b/plugins/Newsfeed/NewsfeedPlugin.py
@@ -60,7 +60,7 @@ class UiWebsocketPlugin(object):
                     else:
                         res = site.storage.query(query + " ORDER BY date_added DESC LIMIT %s" % limit)
 
-                except Exception, err:  # Log error
+                except Exception as err:  # Log error
                     self.log.error("%s feed query %s error: %s" % (address, name, err))
                     continue
 
diff --git a/plugins/OptionalManager/ContentDbPlugin.py b/plugins/OptionalManager/ContentDbPlugin.py
index 9df52f00..d1a1dd29 100644
--- a/plugins/OptionalManager/ContentDbPlugin.py
+++ b/plugins/OptionalManager/ContentDbPlugin.py
@@ -132,7 +132,7 @@ class ContentDbPlugin(object):
             content = site.content_manager.contents[row["inner_path"]]
             try:
                 num += self.setContentFilesOptional(site, row["inner_path"], content, cur=cur)
-            except Exception, err:
+            except Exception as err:
                 self.log.error("Error loading %s into file_optional: %s" % (row["inner_path"], err))
         cur.execute("COMMIT")
         cur.close()
@@ -159,7 +159,7 @@ class ContentDbPlugin(object):
             cur = self
             try:
                 cur.execute("BEGIN")
-            except Exception, err:
+            except Exception as err:
                 self.log.warning("Transaction begin error %s %s: %s" % (site, content_inner_path, Debug.formatException(err)))
 
         num = 0
@@ -195,7 +195,7 @@ class ContentDbPlugin(object):
         if cur == self:
             try:
                 cur.execute("END")
-            except Exception, err:
+            except Exception as err:
                 self.log.warning("Transaction end error %s %s: %s" % (site, content_inner_path, Debug.formatException(err)))
         return num
 
@@ -387,7 +387,7 @@ class ContentDbPlugin(object):
                 site.content_manager.optionalRemove(row["inner_path"], row["hash_id"], row["size"])
                 site.storage.delete(row["inner_path"])
                 need_delete -= row["size"]
-            except Exception, err:
+            except Exception as err:
                 site.log.error("Error deleting %s: %s" % (row["inner_path"], err))
 
             if need_delete <= 0:
diff --git a/plugins/OptionalManager/UiWebsocketPlugin.py b/plugins/OptionalManager/UiWebsocketPlugin.py
index 91f7f6f8..b34b5b88 100644
--- a/plugins/OptionalManager/UiWebsocketPlugin.py
+++ b/plugins/OptionalManager/UiWebsocketPlugin.py
@@ -137,7 +137,7 @@ class UiWebsocketPlugin(object):
 
         try:
             site.storage.delete(inner_path)
-        except Exception, err:
+        except Exception as err:
             return self.response(to, {"error": "File delete error: %s" % err})
 
         self.response(to, "ok")
diff --git a/plugins/PeerDb/PeerDbPlugin.py b/plugins/PeerDb/PeerDbPlugin.py
index 72e585ee..5e968b8b 100644
--- a/plugins/PeerDb/PeerDbPlugin.py
+++ b/plugins/PeerDb/PeerDbPlugin.py
@@ -79,7 +79,7 @@ class ContentDbPlugin(object):
                 "INSERT INTO peer (site_id, address, port, hashfield, time_added) VALUES (?, ?, ?, ?, ?)",
                 self.iteratePeers(site)
             )
-        except Exception, err:
+        except Exception as err:
             site.log.error("Save peer error: %s" % err)
         finally:
             cur.execute("END")
diff --git a/plugins/Sidebar/SidebarPlugin.py b/plugins/Sidebar/SidebarPlugin.py
index 41cbadc0..99339fd0 100644
--- a/plugins/Sidebar/SidebarPlugin.py
+++ b/plugins/Sidebar/SidebarPlugin.py
@@ -171,7 +171,7 @@ class UiWebsocketPlugin(object):
         size_total = size_other = site.settings["size"]
 
         # Bar
-        for extension, color in extensions:
+        for extension as color in extensions:
             if extension == "Total":
                 continue
             if extension == "Other":
@@ -502,7 +502,7 @@ class UiWebsocketPlugin(object):
                 self.cmd("notification", ["geolite-done", _["GeoLite2 City database downloaded!"], 5000])
                 time.sleep(2)  # Wait for notify animation
                 return True
-            except Exception, err:
+            except Exception as err:
                 self.log.error("Error downloading %s: %s" % (db_url, err))
                 pass
         self.cmd("notification", [
diff --git a/plugins/disabled-Dnschain/SiteManagerPlugin.py b/plugins/disabled-Dnschain/SiteManagerPlugin.py
index 9121b425..1a41a9d7 100644
--- a/plugins/disabled-Dnschain/SiteManagerPlugin.py
+++ b/plugins/disabled-Dnschain/SiteManagerPlugin.py
@@ -60,7 +60,7 @@ class SiteManagerPlugin(object):
 					return data["zeronet"].get(sub_domain)
 			# Not found
 			return address
-		except Exception, err:
+		except Exception as err:
 			log.debug("Dnschain.net %s resolve error: %s" % (domain, Debug.formatException(err)))
 
 
@@ -82,7 +82,7 @@ class SiteManagerPlugin(object):
 				return data["zeronet"].get(sub_domain)
 			# Not found
 			return address
-		except Exception, err:
+		except Exception as err:
 			log.debug("Dnschain.info %s resolve error: %s" % (domain, Debug.formatException(err)))
 
 
diff --git a/plugins/disabled-StemPort/__init__.py b/plugins/disabled-StemPort/__init__.py
index 1ce4d973..71150ad6 100644
--- a/plugins/disabled-StemPort/__init__.py
+++ b/plugins/disabled-StemPort/__init__.py
@@ -1,7 +1,7 @@
 try:
     from stem.control import Controller
     stem_found = True
-except Exception, err:
+except Exception as err:
     print "STEM NOT FOUND! %s" % err
     stem_found = False
 
diff --git a/src/main.py b/src/main.py
index d9426a28..e74bc71c 100644
--- a/src/main.py
+++ b/src/main.py
@@ -32,14 +32,14 @@ if not os.path.isdir(config.log_dir):
     os.mkdir(config.log_dir)
     try:
         os.chmod(config.log_dir, stat.S_IRUSR | stat.S_IWUSR | stat.S_IXUSR)
-    except Exception, err:
+    except Exception as err:
         print "Can't change permission of %s: %s" % (config.log_dir, err)
 
 if not os.path.isdir(config.data_dir):
     os.mkdir(config.data_dir)
     try:
         os.chmod(config.data_dir, stat.S_IRUSR | stat.S_IWUSR | stat.S_IXUSR)
-    except Exception, err:
+    except Exception as err:
         print "Can't change permission of %s: %s" % (config.data_dir, err)
 
 if not os.path.isfile("%s/sites.json" % config.data_dir):