diff --git a/include/neuron/define.h b/include/neuron/define.h
index 977d9b50..1ebcf0a6 100644
--- a/include/neuron/define.h
+++ b/include/neuron/define.h
@@ -21,7 +21,7 @@
 #define _NEU_DEFINE_H_
 
 #define NEU_TAG_NAME_LEN 32
-#define NEU_TAG_ADDRESS_LEN 64
+#define NEU_TAG_ADDRESS_LEN 128
 #define NEU_TAG_DESCRIPTION_LEN 128
 #define NEU_GROUP_NAME_LEN 32
 #define NEU_GROUP_INTERVAL_LIMIT 100