diff --git a/gradle.properties b/gradle.properties
index 02e8974..94ffdc5 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -2,5 +2,5 @@ gitea.maven.url = https://gitea.woggioni.net/api/packages/woggioni/maven
 
 lys.version = 2024.12.28
 
-version.envelope=2024.12.31
+version.envelope=2025.01.08
 
diff --git a/loader/src/main/java11/net.woggioni.envelope.loader/JarFileModuleFinder.java b/loader/src/main/java11/net.woggioni.envelope.loader/JarFileModuleFinder.java
index f2d34a6..dd5e02d 100644
--- a/loader/src/main/java11/net.woggioni.envelope.loader/JarFileModuleFinder.java
+++ b/loader/src/main/java11/net.woggioni.envelope.loader/JarFileModuleFinder.java
@@ -192,7 +192,7 @@ public class JarFileModuleFinder implements ModuleFinder {
     private static Set<String> collectPackageNames(JarFile jarFile) {
         Set<String> result = jarFile
             .versionedStream()
-            .filter(entry -> entry.getName().endsWith(".class"))
+            .filter(zipEntry -> !zipEntry.isDirectory())
             .map(entry -> {
                 String entryName = entry.getName();
                 int lastSlash = entryName.lastIndexOf('/');
diff --git a/src/main/java/net/woggioni/gradle/envelope/EnvelopePlugin.java b/src/main/java/net/woggioni/gradle/envelope/EnvelopePlugin.java
index 16227fe..b7ff69e 100644
--- a/src/main/java/net/woggioni/gradle/envelope/EnvelopePlugin.java
+++ b/src/main/java/net/woggioni/gradle/envelope/EnvelopePlugin.java
@@ -12,11 +12,13 @@ import org.gradle.api.tasks.bundling.Jar;
 public class EnvelopePlugin implements Plugin<Project> {
 
     public static final String ENVELOPE_GROUP_NAME = "envelope";
+    public static final String ENVELOPE_JAR_TASK_NAME = "envelopeJar";
+    public static final String ENVELOPE_RUN_TASK_NAME = "envelopeRun";
 
     @Override
     public void apply(Project project) {
         project.getPluginManager().apply(JavaPlugin.class);
-        Provider<EnvelopeJarTask> envelopeJarTaskProvider = project.getTasks().register("envelopeJar", EnvelopeJarTask.class, t -> {
+        Provider<EnvelopeJarTask> envelopeJarTaskProvider = project.getTasks().register(ENVELOPE_JAR_TASK_NAME, EnvelopeJarTask.class, t -> {
             t.setGroup(ENVELOPE_GROUP_NAME);
             t.setDescription("Package the application in a single executable jar file");
             t.includeLibraries(project.getConfigurations().named(JavaPlugin.RUNTIME_CLASSPATH_CONFIGURATION_NAME));
@@ -25,7 +27,7 @@ public class EnvelopePlugin implements Plugin<Project> {
         project.getTasks().named(BasePlugin.ASSEMBLE_TASK_NAME, DefaultTask.class, assembleTask -> {
             assembleTask.dependsOn(envelopeJarTaskProvider);
         });
-        Provider<JavaExec> envelopeRunTaskProvider = project.getTasks().register("envelopeRun", JavaExec.class, t -> {
+        Provider<JavaExec> envelopeRunTaskProvider = project.getTasks().register(ENVELOPE_RUN_TASK_NAME, JavaExec.class, t -> {
             t.getInputs().files(envelopeJarTaskProvider);
             t.setGroup(ENVELOPE_GROUP_NAME);
             t.setDescription("Run the application in the envelope jar");