diff --git a/ChangeLog b/ChangeLog
index 1f182ac..e8f1b4b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,6 @@
+2015-03-11  Manuel Guesdon <mguesdon@orange-concept.com>
+	* GSWeb/GSWHTTPIO.m
+	  force header keys to lowercase
 2014-07-04  Manuel Guesdon <mguesdon@orange-concept.com>
 	* GSWeb/GSWBody.m
 	  fix initWithName:...
diff --git a/GSWeb/GSWHTTPIO.m b/GSWeb/GSWHTTPIO.m
index bfb1ee5..6a1227e 100644
--- a/GSWeb/GSWHTTPIO.m
+++ b/GSWeb/GSWHTTPIO.m
@@ -141,7 +141,7 @@ void _unpackHeaderLineAddToDict(NSString *line, NSMutableDictionary* headers)
     value = [components objectAtIndex:1];
     key = [components objectAtIndex:0];
 
-    key = [key stringByTrimmingSpaces];
+    key = [[key stringByTrimmingSpaces]lowercaseString];
     
     if ([key isEqualToString:GSWHTTPHeader_AdaptorVersion[GSWNAMES_INDEX]]
         || [key isEqualToString:GSWHTTPHeader_ServerName[GSWNAMES_INDEX]]) {