diff --git a/src/ssn/patcher-installer/launch.ts b/src/ssn/patcher-installer/launch.ts
index 7e04207..acad2bb 100644
--- a/src/ssn/patcher-installer/launch.ts
+++ b/src/ssn/patcher-installer/launch.ts
@@ -7,12 +7,12 @@ const processPath = path.join(__dirname, '../../lib/patcher-installer');
 export default function launchProcess(diskFile: string, offset: number, compressedSize: number, decryptionKeys: [number, number, number] | undefined, outputStream: fs.WriteStream) {
   return new Promise((resolve, reject) => {
     const parameters = [
-      diskFile,
-      offset,
-      compressedSize,
+      '--disk', diskFile,
+      '--offset', offset,
+      '--size', compressedSize,
     ];
     if (decryptionKeys !== undefined) {
-      parameters.push(...decryptionKeys);
+      parameters.push('--keys', ...decryptionKeys);
     }
     const spawnedProcess = childProcess.spawn(processPath, parameters.map((value) => value.toString(), { cwd: '.' }));