diff --git a/sms4j-comm/src/main/java/org/dromara/sms4j/comm/utils/SmsUtils.java b/sms4j-comm/src/main/java/org/dromara/sms4j/comm/utils/SmsUtils.java
index 6b25a326..257b94e2 100644
--- a/sms4j-comm/src/main/java/org/dromara/sms4j/comm/utils/SmsUtils.java
+++ b/sms4j-comm/src/main/java/org/dromara/sms4j/comm/utils/SmsUtils.java
@@ -232,7 +232,7 @@ public class SmsUtils {
         if (isEmpty(map)) {
             return new String[0];
         }
-        return toArray(map.values(), SmsUtils::isNotEmpty, s -> s, new String[0]);
+        return toArray(map.values(), SmsUtils::isNotEmpty, s -> s, new String[map.size()]);
     }
 
     /**