diff --git a/srv/ClassifyObject.srv b/srv/ClassifyObject.srv
index 79b6db8..8afb13e 100644
--- a/srv/ClassifyObject.srv
+++ b/srv/ClassifyObject.srv
@@ -12,6 +12,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-string[] image_paths   # input: an image
+string image_path   # input: an image
 ---
-Objects[] objects     # output: objects prediction
+Objects objects     # output: objects prediction
diff --git a/srv/DetectObject.srv b/srv/DetectObject.srv
index f9f8649..0f4a7d1 100644
--- a/srv/DetectObject.srv
+++ b/srv/DetectObject.srv
@@ -12,6 +12,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-string[] image_paths         #input: an image
+string image_path         #input: an image
 ---
-ObjectsInBoxes[] objects    #output: objects prediction with bounding boxes
+ObjectsInBoxes objects    #output: objects prediction with bounding boxes