diff --git a/algorithm/sv_algorithm_base.cpp b/algorithm/sv_algorithm_base.cpp
index 182bce3..f99142f 100644
--- a/algorithm/sv_algorithm_base.cpp
+++ b/algorithm/sv_algorithm_base.cpp
@@ -9,7 +9,7 @@
 #include "ellipse_detector.h"
 
 #define SV_MODEL_DIR "/SpireCV/models/"
-#define SV_ROOT_DIR "/SpireCV/params/a-params/"
+#define SV_ROOT_DIR "/SpireCV/"
 
 
 namespace sv {