diff --git a/src/main/groovy/com/github/skhatri/s3aws/plugin/S3UploadTask.groovy b/src/main/groovy/com/github/skhatri/s3aws/plugin/S3UploadTask.groovy
index 91459b1..489930a 100644
--- a/src/main/groovy/com/github/skhatri/s3aws/plugin/S3UploadTask.groovy
+++ b/src/main/groovy/com/github/skhatri/s3aws/plugin/S3UploadTask.groovy
@@ -10,11 +10,11 @@ import org.gradle.api.tasks.TaskAction
 
 class S3UploadTask extends DefaultTask {
 
-    @Input
+    @Input @Optional
     String bucket
-    @Input
+    @Input @Optional
     String region
-    @Input
+    @Input @Optional
     String awsProfile
     @Input
     String key