diff --git a/demo/Makefile b/demo/Makefile
index cf7c36a..319e9f8 100644
--- a/demo/Makefile
+++ b/demo/Makefile
@@ -1,4 +1,4 @@
-IOS_SDK_VERSION = 9.0
+IOS_SDK_VERSION = 9.1
 
 IOS_CC = gcc -ObjC
 IOS_SDK = $(shell xcode-select --print-path)/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS$(IOS_SDK_VERSION).sdk