diff --git a/lib/converters/imagemagickService.ts b/lib/converters/imagemagickService.ts
index 5bb3735..37af482 100644
--- a/lib/converters/imagemagickService.ts
+++ b/lib/converters/imagemagickService.ts
@@ -39,9 +39,6 @@ export async function convertWithImageMagick(
     let result: Uint8Array | undefined;
 
     await ImageMagick.read(inputData, (image) => {
-      // Set the output format first
-      image.format = outputFormatEnum;
-
       // Apply quality setting if specified
       if (options.imageQuality !== undefined) {
         image.quality = options.imageQuality;
@@ -68,8 +65,8 @@ export async function convertWithImageMagick(
 
       if (onProgress) onProgress(70);
 
-      // Write the image data
-      result = image.write((data) => data);
+      // Write the image data with the specified format
+      result = image.write(outputFormatEnum);
 
       if (onProgress) onProgress(90);
     });