diff --git a/README.md b/README.md
index f70c7b5..5e891ce 100644
--- a/README.md
+++ b/README.md
@@ -40,11 +40,11 @@ make
 simple-http-server -d port folder
 ```
 ### 5. Enjoy it!
+You can change token and datafile by passing env `TOKEN` & `DATFILE`.
 
 ## API
 The API of CMoe is simpler than [Moe-counter](https://github.com/journey-ad/Moe-counter)
 ### 1. Register
-`token` is defined in `cmoe.h`
 ```
 http://yourdomain/cmoe?name=yourname&reg=token
 ```
diff --git a/cmoe.c b/cmoe.c
index c934a97..536efe9 100644
--- a/cmoe.c
+++ b/cmoe.c
@@ -10,6 +10,9 @@
 static uint32_t* items_len;
 static COUNTER counter;
 
+static char* DATFILE = "dat.sp";
+static char* TOKEN = "fumiama";
+
 #define ADD_HEADER_PARAM(buf, offset, h, p) sprintf(buf + offset, (h), (p))
 #define HEADER(content_type) HTTP200 SERVER_STRING CACHE_CTRL CONTENT_TYPE(content_type)
 #define headers(content_len, content_type) (_headers(content_len, HEADER(content_type), sizeof(HEADER(content_type))-1))
@@ -183,6 +186,10 @@ static int name_exist(char* name) {
 // Usage: cmoe method query_string
 int main(int argc, char **argv) {
     if(argc == 3) {
+        char* str = getenv("DATFILE");
+        if(str != NULL) DATFILE = str;
+        str = getenv("TOKEN");
+        if(str != NULL) TOKEN = str;
         char* name = strstr(QS, "name=");
         items_len = align_struct(sizeof(COUNTER), 2, &counter.name, &counter.count);
         if(!items_len) http_error(HTTP500, "Align Struct Error.");
diff --git a/cmoe.h b/cmoe.h
index f97b58e..0c9a554 100644
--- a/cmoe.h
+++ b/cmoe.h
@@ -3,9 +3,6 @@
 
 #include <stdint.h>
 
-#define DATFILE "dat.sp"
-#define TOKEN "fumiama"
-
 #define COUNTER_NAME_LEN 64
 struct COUNTER {
     char name[COUNTER_NAME_LEN];