diff --git a/ppfun-bridge/src/ppfunMatrixBridge.js b/ppfun-bridge/src/ppfunMatrixBridge.js
index 9b0e2d3..17174a7 100644
--- a/ppfun-bridge/src/ppfunMatrixBridge.js
+++ b/ppfun-bridge/src/ppfunMatrixBridge.js
@@ -56,7 +56,7 @@ class PPfunMatrixBridge {
     const arr = Array.from(this.echoSuppression);
     for (let i = 0; i < arr.length; i += 1) {
       const [key, value] = arr[i];
-      if (curTime - 10000 > value) {
+      if (curTime - 30000 > value) {
         this.echoSuppression.delete(key);
       }
     }