diff --git a/peak_det_eval.grc b/peak_det_eval.grc
index 841f38a..e37e446 100644
--- a/peak_det_eval.grc
+++ b/peak_det_eval.grc
@@ -311,7 +311,7 @@
     </param>
     <param>
       <key>value</key>
-      <value>18</value>
+      <value>15</value>
     </param>
   </block>
   <block>