diff --git a/IPython/core/application.py b/IPython/core/application.py
index dcece3b..fea2b50 100644
--- a/IPython/core/application.py
+++ b/IPython/core/application.py
@@ -27,7 +27,7 @@ from IPython.core.profiledir import ProfileDir, ProfileDirError
 from IPython.paths import get_ipython_dir, get_ipython_package_dir
 from IPython.utils.path import ensure_dir_exists
 from traitlets import (
-    List, Unicode, Type, Bool, Dict, Set, Instance, Undefined,
+    List, Unicode, Type, Bool, Set, Instance, Undefined,
     default, observe,
 )
 
@@ -101,12 +101,12 @@ class ProfileAwareConfigLoader(PyFileConfigLoader):
 
 class BaseIPythonApplication(Application):
 
-    name = Unicode(u'ipython')
+    name = u'ipython'
     description = Unicode(u'IPython: an enhanced interactive Python shell.')
     version = Unicode(release.version)
 
-    aliases = Dict(base_aliases)
-    flags = Dict(base_flags)
+    aliases = base_aliases
+    flags = base_flags
     classes = List([ProfileDir])
     
     # enable `load_subconfig('cfg.py', profile='name')`
diff --git a/IPython/terminal/ipapp.py b/IPython/terminal/ipapp.py
index 47deca9..53be577 100755
--- a/IPython/terminal/ipapp.py
+++ b/IPython/terminal/ipapp.py
@@ -15,7 +15,7 @@ import sys
 import warnings
 
 from traitlets.config.loader import Config
-from traitlets.config.application import boolean_flag, catch_config_error, Application
+from traitlets.config.application import boolean_flag, catch_config_error
 from IPython.core import release
 from IPython.core import usage
 from IPython.core.completer import IPCompleter
@@ -35,7 +35,7 @@ from IPython.extensions.storemagic import StoreMagics
 from .interactiveshell import TerminalInteractiveShell
 from IPython.paths import get_ipython_dir
 from traitlets import (
-    Bool, List, Dict, default, observe, Type
+    Bool, List, default, observe, Type
 )
 
 #-----------------------------------------------------------------------------
@@ -164,11 +164,11 @@ aliases.update(shell_aliases)
 
 class LocateIPythonApp(BaseIPythonApplication):
     description = """print the path to the IPython dir"""
-    subcommands = Dict(dict(
+    subcommands = dict(
         profile=('IPython.core.profileapp.ProfileLocate',
             "print the path to an IPython profile directory",
         ),
-    ))
+    )
     def start(self):
         if self.subapp is not None:
             return self.subapp.start()
@@ -182,8 +182,8 @@ class TerminalIPythonApp(BaseIPythonApplication, InteractiveShellApp):
     crash_handler_class = IPAppCrashHandler
     examples = _examples
 
-    flags = Dict(flags)
-    aliases = Dict(aliases)
+    flags = flags
+    aliases = aliases
     classes = List()
 
     interactive_shell_class = Type(