diff --git a/pom.xml b/pom.xml
index bb52516..f65cfd1 100644
--- a/pom.xml
+++ b/pom.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!--
 
-    Copyright 2018-2020 The OpenZipkin Authors
+    Copyright 2018-2023 The OpenZipkin Authors
 
     Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
     in compliance with the License. You may obtain a copy of the License at
@@ -113,7 +113,7 @@
     <dependency>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-loader-tools</artifactId>
-      <version>2.4.0</version>
+      <version>2.7.18</version>
       <scope>provided</scope>
     </dependency>
 
diff --git a/src/main/java/zipkin/layout/ZipkinLayoutFactory.java b/src/main/java/zipkin/layout/ZipkinLayoutFactory.java
index e43c7bc..a682afb 100644
--- a/src/main/java/zipkin/layout/ZipkinLayoutFactory.java
+++ b/src/main/java/zipkin/layout/ZipkinLayoutFactory.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2018-2020 The OpenZipkin Authors
+ * Copyright 2018-2023 The OpenZipkin Authors
  *
  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
  * in compliance with the License. You may obtain a copy of the License at
@@ -50,12 +50,20 @@ public void setName(String name) {
       }
 
       // If the scope of the library is CUSTOM, then the libs will be repackaged to "libs/" directory
-      @Override public String getLibraryDestination(String libraryName, LibraryScope scope) {
+      @Override public String getLibraryLocation(String libraryName, LibraryScope scope) {
         return "lib/";
       }
 
       @Override public String getClassesLocation() {
-        return null;
+        return "classes/";
+      }
+
+      @Override public String getClasspathIndexFileLocation() {
+        return Layout.super.getClasspathIndexFileLocation();
+      }
+
+      @Override public String getLayersIndexFileLocation() {
+        return Layout.super.getLayersIndexFileLocation();
       }
 
       // Marking the jar as non executable