diff --git a/tsconfig.json b/tsconfig.json
index 3fc4d15..6d3eee0 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -4,7 +4,7 @@
     "module": "esnext",
     "moduleResolution": "node",
     "lib": ["es2017", "dom"],
-    "typeRoots": ["./node_modules/@types"],
+    "typeRoots": ["./types", "./node_modules/@types"],
     "jsx": "react",
     "baseUrl": "./src",
     "allowSyntheticDefaultImports": true,
@@ -29,6 +29,6 @@
     "emitDecoratorMetadata": true
   },
   "types": ["node"],
-  "include": ["src/**/*"],
+  "include": ["src/**/*", "types/*"],
   "exclude": ["node_modules", "dist"]
 }
diff --git a/types/typings.d.ts b/types/typings.d.ts
new file mode 100644
index 0000000..5cac4b6
--- /dev/null
+++ b/types/typings.d.ts
@@ -0,0 +1,6 @@
+declare module '*.json';
+declare module '*.css';
+declare module '*.scss';
+declare module '*.md';
+
+type BigInt = string;