diff --git a/system/core/Security.php b/system/core/Security.php
index 39e4f7c..bb06705 100755
--- a/system/core/Security.php
+++ b/system/core/Security.php
@@ -205,11 +205,11 @@
 			$uri = load_class('URI', 'core');
 			foreach ($exclude_uris as $excluded)
 			{
-                		if (preg_match('#^'.$excluded.'$#i'.(UTF8_ENABLED ? 'u' : ''), $uri->uri_string()))
-                		{
-                    			return $this;
-                		}
-            		}
+				if (preg_match('#^'.$excluded.'$#i'.(UTF8_ENABLED ? 'u' : ''), $uri->uri_string()))
+				{
+					return $this;
+				}
+			}
 		}
 
 		// Do the tokens exist in both the _POST and _COOKIE arrays?
@@ -937,4 +937,4 @@
 }
 
 /* End of file Security.php */
-/* Location: ./system/core/Security.php */
+/* Location: ./system/core/Security.php */
\ No newline at end of file
diff --git a/user_guide_src/source/changelog.rst b/user_guide_src/source/changelog.rst
index 2d523e9..c4360aa 100644
--- a/user_guide_src/source/changelog.rst
+++ b/user_guide_src/source/changelog.rst
@@ -506,8 +506,8 @@
    -  :doc:`Security Library <libraries/security>` changes include:
 
       -  Added method ``strip_image_tags()``.
-      -  Added ``$config['csrf_regeneration']``, which makes token regeneration optional.
-      -  Added ``$config['csrf_exclude_uris']``, which allows you list URIs which will not have the CSRF validation methods run. Optionally allows regex.
+      -  Added ``$config['csrf_regeneration']``, which makes CSRF token regeneration optional.
+      -  Added ``$config['csrf_exclude_uris']``, allowing for exclusion of URIs from the CSRF protection (regular expressions are supported).
       -  Modified method ``sanitize_filename()`` to read a public ``$filename_bad_chars`` property for getting the invalid characters list.
       -  Return status code of 403 instead of a 500 if CSRF protection is enabled but a token is missing from a request.
 
diff --git a/user_guide_src/source/libraries/security.rst b/user_guide_src/source/libraries/security.rst
index 19480b4..c8d69d1 100644
--- a/user_guide_src/source/libraries/security.rst
+++ b/user_guide_src/source/libraries/security.rst
@@ -97,10 +97,12 @@
 
 	$config['csrf_exclude_uris'] = array('api/person/add');
 
-Optionally, you can use regular expressions in the URIs::
+Regular expressions are also supported (case-insensitive)::
 
-	$config['csrf_exclude_uris'] = array('api/record/[0-9]+','api/title/[a-zA-Z]+');
-	
+	$config['csrf_exclude_uris'] = array(
+		'api/record/[0-9]+',
+		'api/title/[a-z]+'
+	);
 
 ***************
 Class Reference
@@ -161,4 +163,4 @@
 		This method acts a lot like PHP's own native ``html_entity_decode()`` function in ENT_COMPAT mode, only
 		it tries to detect HTML entities that don't end in a semicolon because some browsers allow that.
 
-		If the ``$charset`` parameter is left empty, then your configured ``$config['charset']`` value will be used.
+		If the ``$charset`` parameter is left empty, then your configured ``$config['charset']`` value will be used.
\ No newline at end of file