diff --git a/src/main.rs b/src/main.rs
index 761d8b1..24d5793 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -269,10 +269,10 @@ fn apply_image_parameters(lr: *mut libraw_data_t, args: &Args) {
             libraw_set_bright(lr, args.exposure);
         }
 
-        // Apply contrast (using highlight parameters for demonstration)
+        // Apply contrast (map to brightness multiplier for tonal range)
         if args.contrast != 0 && !lr.is_null() {
-            let value = args.contrast.min(100).max(-100) as c_int;
-            libraw_set_highlight(lr, value);
+            let value = args.contrast.min(100).max(-100) as f32 / 100.0 * 100.0;
+            libraw_set_bright(lr, value);
         }
 
         // Apply highlights adjustment