diff --git a/HMCLCore/src/main/java/org/jackhuang/hmcl/download/MaintainTask.java b/HMCLCore/src/main/java/org/jackhuang/hmcl/download/MaintainTask.java
index f51439b7b..70764c317 100644
--- a/HMCLCore/src/main/java/org/jackhuang/hmcl/download/MaintainTask.java
+++ b/HMCLCore/src/main/java/org/jackhuang/hmcl/download/MaintainTask.java
@@ -27,6 +27,7 @@ import org.jackhuang.hmcl.util.versioning.VersionNumber;
 
 import java.io.File;
 import java.io.IOException;
+import java.io.InputStream;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
@@ -136,10 +137,9 @@ public class MaintainTask extends Task<Version> {
                 builder.addJvmArgument("-Dhmcl.transformer.candidates=${library_directory}/" + library.getPath());
                 if (!libraryExisting) builder.addLibrary(hmclTransformerDiscoveryService);
                 Path libraryPath = repository.getLibraryFile(version, hmclTransformerDiscoveryService).toPath();
-                try {
+                try (InputStream input = MaintainTask.class.getResourceAsStream("/assets/game/HMCLTransformerDiscoveryService-1.0.jar")) {
                     Files.createDirectories(libraryPath.getParent());
-                    Files.copy(MaintainTask.class.getResourceAsStream("/assets/game/HMCLTransformerDiscoveryService-1.0.jar"),
-                            libraryPath, StandardCopyOption.REPLACE_EXISTING);
+                    Files.copy(input, libraryPath, StandardCopyOption.REPLACE_EXISTING);
                 } catch (IOException e) {
                     Logging.LOG.log(Level.WARNING, "Unable to unpack HMCLTransformerDiscoveryService", e);
                 }