diff --git a/build.gradle b/build.gradle
index d59ab86..78398ee 100644
--- a/build.gradle
+++ b/build.gradle
@@ -10,7 +10,7 @@ subprojects { subproject ->
     }
 
     int javaVersion
-    if(subproject.path == ':osgi-app' || ':multi-release-jar') {
+    if(subproject.path == ':osgi-app' || subproject.path == ':multi-release-jar') {
         javaVersion = 11
     } else {
         javaVersion = 8
diff --git a/gradle.properties b/gradle.properties
index 6d8d413..6d82616 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -2,7 +2,7 @@ woggioniMavenRepositoryUrl=https://mvn.woggioni.net/
 
 lys.catalog.version=2024.02.12
 
-version.myGradlePlugins=2024.02.24
+version.myGradlePlugins=2024.03.11
 version.gradle=7.6
 version.felix.config.admin=1.9.26
 version.felix=7.0.5
diff --git a/sambal/src/main/java/net/woggioni/gradle/sambal/SignJarTask.java b/sambal/src/main/java/net/woggioni/gradle/sambal/SignJarTask.java
index f4731b3..5dcf14f 100644
--- a/sambal/src/main/java/net/woggioni/gradle/sambal/SignJarTask.java
+++ b/sambal/src/main/java/net/woggioni/gradle/sambal/SignJarTask.java
@@ -1,5 +1,7 @@
 package net.woggioni.gradle.sambal;
 
+import org.codehaus.groovy.ant.Groovy;
+import org.codehaus.groovy.util.StringUtil;
 import org.gradle.api.DefaultTask;
 import org.gradle.api.file.DirectoryProperty;
 import org.gradle.api.file.RegularFile;
@@ -48,7 +50,7 @@ abstract class SignJarTask extends DefaultTask {
     public Provider<RegularFile> getArchiveFile() {
         StringBuilder sb = new StringBuilder(getArchiveBaseName().get());
         sb.append('-').append(getArchiveVersion().get());
-        if(getArchiveClassifier().isPresent() && !getArchiveClassifier().get().isBlank()) {
+        if(getArchiveClassifier().isPresent() && !getArchiveClassifier().get().isEmpty()) {
             sb.append('-').append(getArchiveClassifier().get());
         }
         sb.append('.').append(getArchiveExtension().get());