diff --git a/kernels/Ikeda3D.hpp b/kernels/Ikeda3D.hpp
index 777f521..8fe0648 100644
--- a/kernels/Ikeda3D.hpp
+++ b/kernels/Ikeda3D.hpp
@@ -26,7 +26,7 @@ public:
 		parameters[0] = rand() / double(RAND_MAX) *2.0 - 0.5;
 		parameters[1] = rand() / double(RAND_MAX) *2.0 - 0.5;	// wikipedia: u
 		parameters[2] = rand() / double(RAND_MAX) *2.0 - 0.5;
-		parameters[3] = rand() / double(RAND_MAX) *30.0;
+		parameters[3] = rand() / double(RAND_MAX) *20.0;
 		init();
 	}