diff --git a/tcllib/__init__.py b/tcllib/__init__.py
index b8a82d2..9731aeb 100644
--- a/tcllib/__init__.py
+++ b/tcllib/__init__.py
@@ -18,15 +18,15 @@ def default_enum(enumname, vardict):
     return enum.IntEnum(enumname, vardict, module=__name__, qualname="tcllib.FotaCheck.{}".format(enumname))
 
 class FotaCheck(
-    tclcheck.TclCheck,
-    tclrequest.TclRequest,
-    tclchecksum.TclChecksum,
-    tclencheader.TclEncHeader,
-    servervote.ServerVote,
-    credentials.Credentials,
-    devlist.DevList,
-    dumpmgr.DumpMgr,
-    xmltools.XmlTools
+    tclcheck.TclCheckMixin,
+    tclrequest.TclRequestMixin,
+    tclchecksum.TclChecksumMixin,
+    tclencheader.TclEncHeaderMixin,
+    servervote.ServerVoteMixin,
+    credentials.CredentialsMixin,
+    devlist.DevListMixin,
+    dumpmgr.DumpMgrMixin,
+    xmltools.XmlToolsMixin
     ):
     VDKEY = b"eJwdjwEOwDAIAr8kKFr//7HhmqXp8AIIDrYAgg8byiUXrwRJRXja+d6iNxu0AhUooDCN9rd6rDLxmGIakUVWo3IGCTRWqCAt6X4jGEIUAxgN0eYWnp+LkpHQAg/PsO90ELsy0Npm/n2HbtPndFgGEV31R9OmT4O4nrddjc3Qt6nWscx7e+WRHq5UnOudtjw5skuV09pFhvmqnOEIs4ljPeel1wfLYUF4\n"
     CKTP = default_enum("CKTP", ["AUTO", "MANUAL"])
diff --git a/tcllib/credentials.py b/tcllib/credentials.py
index 10ef96c..fa217e4 100644
--- a/tcllib/credentials.py
+++ b/tcllib/credentials.py
@@ -2,7 +2,7 @@
 
 import base64
 
-class Credentials:
+class CredentialsMixin:
     @staticmethod
     def get_creds():
         creds = {
diff --git a/tcllib/devlist.py b/tcllib/devlist.py
index a6d92be..89cde77 100644
--- a/tcllib/devlist.py
+++ b/tcllib/devlist.py
@@ -10,7 +10,7 @@ DEVICELIST_URL = "https://tclota.birth-online.de/json_lastupdates.php"
 DEVICELIST_FILE = "prds.json"
 DEVICELIST_CACHE_SECONDS = 86400
 
-class DevList:
+class DevListMixin:
     @staticmethod
     def get_devicelist(force=False, output_diff=True):
         need_download = True
diff --git a/tcllib/dumpmgr.py b/tcllib/dumpmgr.py
index 04ad79f..a91b294 100644
--- a/tcllib/dumpmgr.py
+++ b/tcllib/dumpmgr.py
@@ -5,7 +5,7 @@ import glob
 import os
 from . import ansi
 
-class DumpMgr:
+class DumpMgrMixin:
     def __init__(self):
         self.last_dump_filename = None
 
diff --git a/tcllib/servervote.py b/tcllib/servervote.py
index 57acbdc..8c96dd1 100644
--- a/tcllib/servervote.py
+++ b/tcllib/servervote.py
@@ -2,7 +2,7 @@
 
 import numpy
 
-class ServerVote:
+class ServerVoteMixin:
     def __init__(self):
         self.g2master = None
         self.master_servers = [
diff --git a/tcllib/tclcheck.py b/tcllib/tclcheck.py
index f370f44..30c8b7a 100644
--- a/tcllib/tclcheck.py
+++ b/tcllib/tclcheck.py
@@ -5,7 +5,7 @@ from collections import OrderedDict
 import requests
 from defusedxml import ElementTree
 
-class TclCheck:
+class TclCheckMixin:
     def do_check(self, https=True, timeout=10, max_tries=5):
         protocol = "https://" if https else "http://"
         url = protocol + self.g2master + "/check.php"
diff --git a/tcllib/tclchecksum.py b/tcllib/tclchecksum.py
index 13fba15..30d77e9 100644
--- a/tcllib/tclchecksum.py
+++ b/tcllib/tclchecksum.py
@@ -3,7 +3,7 @@
 import json
 from defusedxml import ElementTree
 
-class TclChecksum:
+class TclChecksumMixin:
     def do_checksum(self, encslave, address, uri):
         url = "http://" + encslave + "/checksum.php"
         params = self.get_creds2()
diff --git a/tcllib/tclencheader.py b/tcllib/tclencheader.py
index 47e1a24..48bb168 100644
--- a/tcllib/tclencheader.py
+++ b/tcllib/tclencheader.py
@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 
-class TclEncHeader:
+class TclEncHeaderMixin:
     def do_encrypt_header(self, encslave, address):
         params = self.get_creds2()
         params[b"address"] = bytes(address, "utf-8")
diff --git a/tcllib/tclrequest.py b/tcllib/tclrequest.py
index 6bdc4fb..adde5cb 100644
--- a/tcllib/tclrequest.py
+++ b/tcllib/tclrequest.py
@@ -31,7 +31,7 @@ from defusedxml import ElementTree
     }
 '''
 
-class TclRequest:
+class TclRequestMixin:
     @staticmethod
     def get_salt():
         millis = floor(time.time() * 1000)
diff --git a/tcllib/xmltools.py b/tcllib/xmltools.py
index 9cc8fc4..825edc6 100644
--- a/tcllib/xmltools.py
+++ b/tcllib/xmltools.py
@@ -2,7 +2,7 @@
 
 import xml.dom.minidom
 
-class XmlTools:
+class XmlToolsMixin:
     @staticmethod
     def pretty_xml(xmlstr):
         mdx = xml.dom.minidom.parseString(xmlstr)