diff --git a/build.gradle.kts b/build.gradle.kts
index 3bcb28b..b666f50 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -54,7 +54,10 @@ dependencies {
 
 tasks.jar {
   manifest {
-    attributes(mapOf("Implementation-Title" to project.name, "Implementation-Version" to project.version))
+    attributes(mapOf(
+      "Implementation-Title" to project.name,
+      "Implementation-Version" to project.version,
+      "Automatic-Module-Name" to "org.ajoberstar.jovial"))
   }
 }