Set deployment target to iOS 9.0
diff --git a/OpenWhisk.xcodeproj/project.pbxproj b/OpenWhisk.xcodeproj/project.pbxproj
index 0d20de5..650dd70 100644
--- a/OpenWhisk.xcodeproj/project.pbxproj
+++ b/OpenWhisk.xcodeproj/project.pbxproj
@@ -407,6 +407,7 @@
 				DYLIB_INSTALL_NAME_BASE = "@rpath";
 				INFOPLIST_FILE = OpenWhisk/Info.plist;
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
+				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = org.openwhisk.OpenWhisk;
 				PRODUCT_NAME = "$(TARGET_NAME)";
@@ -425,6 +426,7 @@
 				DYLIB_INSTALL_NAME_BASE = "@rpath";
 				INFOPLIST_FILE = OpenWhisk/Info.plist;
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
+				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = org.openwhisk.OpenWhisk;
 				PRODUCT_NAME = "$(TARGET_NAME)";