diff --git a/OpenUDID.podspec b/OpenUDID.podspec
new file mode 100644
index 0000000..8b82efa
--- /dev/null
+++ b/OpenUDID.podspec
@@ -0,0 +1,13 @@
+Pod::Spec.new do |s|
+  s.name         = 'OpenUDID'
+  s.version      = '1.0.1'
+  s.summary      = 'OpenUDID.'
+  s.homepage     = 'https://github.com/magnusguo/OpenUDID'
+  s.license      = { :type => 'Apache', :file => 'LICENSE' }
+  s.source       = { :git => 'https://github.com/magnusguo/OpenUDID.git', :tag => "#{s.version}" }
+  s.author       = { 'Magnus' => 'https://github.com/magnusguo' }
+  s.ios.deployment_target = '6.0'
+  s.source_files = 'OpenUDID/*.{h,m}'
+  s.requires_arc = false
+  s.compiler_flags = '-fno-objc-arc'
+end
diff --git a/OpenUDID.h b/OpenUDID/OpenUDID.h
similarity index 100%
rename from OpenUDID.h
rename to OpenUDID/OpenUDID.h
diff --git a/OpenUDID.m b/OpenUDID/OpenUDID.m
similarity index 99%
rename from OpenUDID.m
rename to OpenUDID/OpenUDID.m
index 904066e..2ac4802 100644
--- a/OpenUDID.m
+++ b/OpenUDID/OpenUDID.m
@@ -178,12 +178,12 @@ + (NSString*) _generateFreshOpenUDID {
         CFStringRef cfstring = CFUUIDCreateString(kCFAllocatorDefault, uuid);
         const char *cStr = CFStringGetCStringPtr(cfstring,CFStringGetFastestEncoding(cfstring));
         unsigned char result[16];
-        CC_MD5( cStr, strlen(cStr), result );
+        CC_MD5( cStr, (CC_LONG)strlen(cStr), result );
         CFRelease(uuid);
         CFRelease(cfstring);
 
         _openUDID = [NSString stringWithFormat:
-                @"%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%08x",
+                @"%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%08lx",
                 result[0], result[1], result[2], result[3], 
                 result[4], result[5], result[6], result[7],
                 result[8], result[9], result[10], result[11],