diff --git a/weixin-java-mp/src/main/java/me/chanjar/weixin/mp/api/impl/WxMpCardServiceImpl.java b/weixin-java-mp/src/main/java/me/chanjar/weixin/mp/api/impl/WxMpCardServiceImpl.java
index 740c96e95..1bf61ffe3 100644
--- a/weixin-java-mp/src/main/java/me/chanjar/weixin/mp/api/impl/WxMpCardServiceImpl.java
+++ b/weixin-java-mp/src/main/java/me/chanjar/weixin/mp/api/impl/WxMpCardServiceImpl.java
@@ -81,6 +81,7 @@ public class WxMpCardServiceImpl implements WxMpCardService {
     signParams[optionalSignParam.length + 1] = nonceStr;
     signParams[optionalSignParam.length + 2] = cardApiTicket;
     StringBuilder sb = new StringBuilder();
+    Arrays.sort(signParams);
     for (String a : signParams) {
       sb.append(a);
     }