diff --git a/pymanager/manager.py b/pymanager/manager.py
index adb9ffb..07c0c62 100755
--- a/pymanager/manager.py
+++ b/pymanager/manager.py
@@ -197,7 +197,7 @@ class ManageHttpRequest(http.server.SimpleHTTPRequestHandler):
     def _command_log(self):
         """ sub request log (send log on specific process) """
         msgjson = self._extract_input_data()
-        if msgjson == None:
+        if msgjson is None:
             return
 
         logging.debug(msgjson)
@@ -276,7 +276,7 @@ class ManageHttpRequest(http.server.SimpleHTTPRequestHandler):
     def _send_action(self):
         """ send specific action on one program """
         msgjson = self._extract_input_data()
-        if msgjson == None:
+        if msgjson is None:
             return
 
         logging.debug(msgjson)
@@ -316,7 +316,7 @@ class ManageHttpRequest(http.server.SimpleHTTPRequestHandler):
         :param str command: command (START, STOP, STATUS, ... )
         """
         msgjson = self._extract_input_data()
-        if msgjson == None:
+        if msgjson is None:
             return
 
         if 'name' not in msgjson: