diff --git a/include/neuron/define.h b/include/neuron/define.h
index a21f351c..65e82821 100644
--- a/include/neuron/define.h
+++ b/include/neuron/define.h
@@ -20,12 +20,12 @@
 #ifndef _NEU_DEFINE_H_
 #define _NEU_DEFINE_H_
 
-#define NEU_TAG_NAME_LEN 48
+#define NEU_TAG_NAME_LEN 64
 #define NEU_TAG_ADDRESS_LEN 128
 #define NEU_TAG_DESCRIPTION_LEN 128
-#define NEU_GROUP_NAME_LEN 32
+#define NEU_GROUP_NAME_LEN 128
 #define NEU_GROUP_INTERVAL_LIMIT 100
-#define NEU_NODE_NAME_LEN 32
+#define NEU_NODE_NAME_LEN 128
 #define NEU_PLUGIN_NAME_LEN 32
 #define NEU_PLUGIN_LIBRARY_LEN 32
 #define NEU_PLUGIN_DESCRIPTION_LEN 512