diff --git a/localconfig/manager.py b/localconfig/manager.py
index 77119f6..36b70be 100644
--- a/localconfig/manager.py
+++ b/localconfig/manager.py
@@ -46,6 +46,14 @@ def __setattr__(self, key, value):
             else:
                 return self._config.set(self._section, key, value)
 
+        def __contains__(self, key):
+            """
+            Determine if this section has specified attribute
+            
+            :param str key: Config key to look for
+            """
+            return (self._section, key) in self._config._dot_keys
+        
         def __iter__(self):
             return self._config.items(self._section)
 
@@ -355,6 +363,7 @@ def __getattr__(self, section):
         """
         self._read_sources()
 
+        section = section.lower()
         if section in self._dot_keys:
             return self.SectionAccessor(self, section)
 
diff --git a/setup.py b/setup.py
index 6feb32f..a1521a6 100644
--- a/setup.py
+++ b/setup.py
@@ -5,7 +5,7 @@
 
 setuptools.setup(
   name='localconfig',
-  version='1.1.5',
+  version='1.1.6',
 
   author='Max Zheng',
   author_email='maxzheng.os @t gmail.com',