diff --git a/package.json b/package.json
index 413f837..4948a6b 100644
--- a/package.json
+++ b/package.json
@@ -1,5 +1,6 @@
 {
   "name": "tic-crypto",
+  "main": "ticc.js",
   "version": "0.1.0",
   "private": true,
   "dependencies": {
diff --git a/index.js b/ticc.js
similarity index 99%
rename from index.js
rename to ticc.js
index edd442d..41d796d 100644
--- a/index.js
+++ b/ticc.js
@@ -746,13 +746,13 @@ class TicCrypto {
       let prefix
       switch (world) {
         // Base64: https://baike.baidu.com/item/base64
-        case 'earth':
+        case 'EARTH':
           prefix = '4c'
           break // Base58: 0x42=66 => T, Base64: T=0x13=0b00010011 => 0b010011xx = 0x4c~4f
-        case 'moon':
+        case 'MOON':
           prefix = 'b4'
           break // Base58: 0x7f=127,0x80=128 => t, Base64: t=0x2d=0b00101101 => 0b101101xx = 0xB4~B7
-        case 'comet':
+        case 'COMET':
           prefix = '74'
           break // Base58: 0x90 => d, Base 64: d=0x1d=0b00011101 => 0b 011101xx = 0x74~77
         default: