diff --git a/src/index.js b/src/index.js
index 6cb1c26..95c423c 100644
--- a/src/index.js
+++ b/src/index.js
@@ -83,7 +83,7 @@ class ClapDetector {
     const duration = get(stats, 'Length (seconds)')
     const rms = get(stats, 'RMS amplitude')
     const max = get(stats, 'Maximum amplitude')
-    return (duration < CLAP_MAX_DURATION && max > CLAP_AMPLITUDE_THRESHOLD && rms < CLAP_ENERGY_THRESHOLD)
+    return (duration < (CLAP_MAX_DURATION / 1000) && max > CLAP_AMPLITUDE_THRESHOLD && rms < CLAP_ENERGY_THRESHOLD)
   }
 
   handleClap() {