diff --git a/README.md b/README.md
index 26e748a..63d1a2a 100644
--- a/README.md
+++ b/README.md
@@ -37,8 +37,8 @@ The runtracker.cpp is prepared to be used with the VOT toolkit. The executable "
 
 Options available:   
 
-gray - Use raw gray level features as in [1].   
-hog - Use HOG features as in [2].   
+gray - Use raw gray level features as in [2].   
+hog - Use HOG features as in [1].   
 lab - Use Lab colorspace features. This option will also enable HOG features by default.   
 singlescale - Performs single-scale detection, using a variable-size window.   
 fixed_window - Keep the window size fixed when in single-scale mode (multi-scale always used a fixed window).