diff --git a/spring-boot-project/spring-boot-tools/spring-boot-loader/src/main/java/org/springframework/boot/loader/jar/JarFile.java b/spring-boot-project/spring-boot-tools/spring-boot-loader/src/main/java/org/springframework/boot/loader/jar/JarFile.java
index 0e493a4f9c1..53977396b93 100644
--- a/spring-boot-project/spring-boot-tools/spring-boot-loader/src/main/java/org/springframework/boot/loader/jar/JarFile.java
+++ b/spring-boot-project/spring-boot-tools/spring-boot-loader/src/main/java/org/springframework/boot/loader/jar/JarFile.java
@@ -115,6 +115,7 @@ public class JarFile extends java.util.jar.JarFile implements Iterable<java.util
 	 */
 	JarFile(JarFile parent) throws IOException {
 		super(parent.rootFile.getFile());
+		super.close();
 		this.parent = parent;
 		this.rootFile = parent.rootFile;
 		this.pathFromRoot = parent.pathFromRoot;