diff --git a/spring-boot-project/spring-boot-tools/spring-boot-loader/src/main/java/org/springframework/boot/loader/net/protocol/jar/JarUrlClassLoader.java b/spring-boot-project/spring-boot-tools/spring-boot-loader/src/main/java/org/springframework/boot/loader/net/protocol/jar/JarUrlClassLoader.java
index b32a9b1b56..d8829abf7a 100644
--- a/spring-boot-project/spring-boot-tools/spring-boot-loader/src/main/java/org/springframework/boot/loader/net/protocol/jar/JarUrlClassLoader.java
+++ b/spring-boot-project/spring-boot-tools/spring-boot-loader/src/main/java/org/springframework/boot/loader/net/protocol/jar/JarUrlClassLoader.java
@@ -40,6 +40,10 @@ import org.springframework.boot.loader.launch.LaunchedClassLoader;
  */
 public abstract class JarUrlClassLoader extends URLClassLoader {
 
+	static {
+		ClassLoader.registerAsParallelCapable();
+	}
+
 	private final URL[] urls;
 
 	private final boolean hasJarUrls;