diff --git a/src/land.c b/src/land.c
index 7e21904..f52fd67 100644
--- a/src/land.c
+++ b/src/land.c
@@ -972,7 +972,7 @@ static int shipyard_yoursTransportPrice(char* shipname) {
   if(strcmp(loc, land_planet->name)==0) /* Already here. */
     return 0;
 
-  price = (int)ship->solid->mass*500;
+  price = (int)(sqrt(ship->solid->mass)*5000.);
 
   return price;
 }