diff --git a/common/waifu2x.h b/common/waifu2x.h
index c6e4154..b700f44 100644
--- a/common/waifu2x.h
+++ b/common/waifu2x.h
@@ -11,7 +11,7 @@
 #include <opencv2/core.hpp>
 
 #define CUDNN_DLL_NAME "cudnn64_5.dll"
-#define CUDNN_REQUIRE_VERION_TEXT "v5 RC"
+#define CUDNN_REQUIRE_VERION_TEXT "v5.1 RC"
 
 
 namespace caffe