diff --git a/.gitignore b/.gitignore
index e74fcb67..406f92f9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,6 +5,7 @@ tmp
 !tmp/sample
 src/**/*.d.ts
 src/**/*.d.ts.map
+!src/global.d.ts
 
 # dependencies
 /node_modules
diff --git a/src/global.d.ts b/src/global.d.ts
new file mode 100644
index 00000000..129e4793
--- /dev/null
+++ b/src/global.d.ts
@@ -0,0 +1,9 @@
+declare module "*.wasm" {
+  const value: any;
+  export default value;
+}
+
+declare module '*?url' {
+  const src: string
+  export default src
+}