diff --git a/pf4j/src/main/java/org/pf4j/ManifestPluginDescriptorFinder.java b/pf4j/src/main/java/org/pf4j/ManifestPluginDescriptorFinder.java
index e2bac20..47f4d72 100644
--- a/pf4j/src/main/java/org/pf4j/ManifestPluginDescriptorFinder.java
+++ b/pf4j/src/main/java/org/pf4j/ManifestPluginDescriptorFinder.java
@@ -51,8 +51,8 @@ public class ManifestPluginDescriptorFinder implements PluginDescriptorFinder {
 
     protected Manifest readManifest(Path pluginPath) throws PluginException {
         if (FileUtils.isJarFile(pluginPath)) {
-            try {
-                Manifest manifest = new JarFile(pluginPath.toFile()).getManifest();
+            try(JarFile jar = new JarFile(pluginPath.toFile())) {
+                Manifest manifest = jar.getManifest();
                 if (manifest != null) {
                     return manifest;
                 }