diff --git a/client/src/Ditherer.ts b/client/src/lib/Ditherer.ts
similarity index 95%
rename from client/src/Ditherer.ts
rename to client/src/lib/Ditherer.ts
index 4bed76a..2351227 100644
--- a/client/src/Ditherer.ts
+++ b/client/src/lib/Ditherer.ts
@@ -2,8 +2,11 @@ class Ditherer {
   async dither(image: Uint8ClampedArray): Promise<Uint8ClampedArray> {
     const worker: any = await wasmWorker("/main.wasm");
     let output: Uint8ClampedArray;
-    output = await worker.dither(image);
-    worker.terminate();
+    try {
+      output = await worker.dither(image);
+    } finally {
+      worker.terminate();
+    }
     return output;
   }
 }