diff --git a/src/index.js b/src/index.js
index dd54436..ab62f7a 100644
--- a/src/index.js
+++ b/src/index.js
@@ -14,7 +14,7 @@ module.exports = {
   version:require("./lib/version"),
   generations:require("./lib/generations"),
   experience:require("./lib/experience"),
-  UserError:require("./lib/UserError")
+  UserError:require("./lib/user_error")
 };
 
 function createMCServer(options) {
diff --git a/src/lib/UserError.js b/src/lib/user_error.js
similarity index 100%
rename from src/lib/UserError.js
rename to src/lib/user_error.js