diff --git a/scripts/advanced.php b/scripts/advanced.php
index af07692..97d1a64 100644
--- a/scripts/advanced.php
+++ b/scripts/advanced.php
@@ -203,10 +203,10 @@ if (file_exists('./scripts/thisrun.txt')) {
       <input name="channels" type="number" min="1" max="32" step="1" value="<?php print($newconfig['CHANNELS']);?>" required/><br>
       <p>Set Channels to the number of channels supported by your sound card. 32 max.</p>
       <label for="recording_length">Recording Length: </label>
-      <input name="recording_length" type="number" min="3" max="60" step="1" value="<?php print($newconfig['RECORDING_LENGTH']);?>" required/><br>
+      <input name="recording_length" oninput="document.getElementsByName('extraction_length')[0].setAttribute('max', this.value);" type="number" min="3" max="60" step="1" value="<?php print($newconfig['RECORDING_LENGTH']);?>" required/><br>
       <p>Set Recording Length in seconds between 6 and 60. Multiples of 3 are recommended, as BirdNET analyzes in 3-second chunks.</p> 
       <label for="extraction_length">Extraction Length: </label>
-      <input name="extraction_length" type="number" min="3" max="<?php print($newconfig['RECORDING_LENGTH']);?>" value="<?php print($newconfig['EXTRACTION_LENGTH']);?>" /><br>
+      <input name="extraction_length" oninput="this.setAttribute('max', document.getElementsByName('recording_length')[0].value);" type="number" min="3" value="<?php print($newconfig['EXTRACTION_LENGTH']);?>" /><br>
       <p>Set Extraction Length to something less than your Recording Length. Min=3 Max=Recording Length</p>
       <label for="audiofmt">Extractions Audio Format</label>
       <select name="audiofmt">