diff --git a/convention/src/main/kotlin/io/gitlab/jfronny/scripts/BumpVersionTask.kt b/convention/src/main/kotlin/io/gitlab/jfronny/scripts/BumpVersionTask.kt
index f0322a5..4685bca 100644
--- a/convention/src/main/kotlin/io/gitlab/jfronny/scripts/BumpVersionTask.kt
+++ b/convention/src/main/kotlin/io/gitlab/jfronny/scripts/BumpVersionTask.kt
@@ -6,6 +6,7 @@ import org.gradle.api.file.DirectoryProperty
 import org.gradle.api.provider.Property
 import org.gradle.api.tasks.Input
 import org.gradle.api.tasks.InputDirectory
+import org.gradle.api.tasks.Optional
 import org.gradle.api.tasks.TaskAction
 
 abstract class BumpVersionTask : DefaultTask() {
@@ -18,7 +19,7 @@ abstract class BumpVersionTask : DefaultTask() {
     @get:Input abstract val nextVersionType: Property<String>
     @get:Input abstract val nextRelease: Property<SemanticVersion>
     @get:Input abstract val lastRelease: Property<String>
-    @get:Input abstract val typeSupplement: Property<String>
+    @get:Input @get:Optional abstract val typeSupplement: Property<String>
 
     @TaskAction
     fun action() {