diff --git a/unilabos/registry/devices/liquid_handler.yaml b/unilabos/registry/devices/liquid_handler.yaml
index eef0404..bb94b59 100644
--- a/unilabos/registry/devices/liquid_handler.yaml
+++ b/unilabos/registry/devices/liquid_handler.yaml
@@ -358,8 +358,8 @@ liquid_handler.biomek:
       transfer_biomek:
         type: LiquidHandlerTransferBiomek
         goal:
-          source: source
-          target: target
+          sources: sources
+          targets: targets
           tip_rack: tip_rack
           volume: volume
           aspirate_techniques: aspirate_techniques
@@ -417,8 +417,8 @@ liquid_handler.biomek:
       move_biomek:
         type: LiquidHandlerMoveBiomek
         goal:
-          source: resource
-          target: target
+          source: sources
+          target: targets
         feedback: {}
         result:
           name: name
diff --git a/unilabos_msgs/action/LiquidHandlerMoveBiomek.action b/unilabos_msgs/action/LiquidHandlerMoveBiomek.action
index b12feb1..9c75206 100644
--- a/unilabos_msgs/action/LiquidHandlerMoveBiomek.action
+++ b/unilabos_msgs/action/LiquidHandlerMoveBiomek.action
@@ -1,5 +1,5 @@
-string source
-string target
+string sources
+string targets
 
 ---
 string return_info
diff --git a/unilabos_msgs/action/LiquidHandlerTransferBiomek.action b/unilabos_msgs/action/LiquidHandlerTransferBiomek.action
index cee47bc..65db264 100644
--- a/unilabos_msgs/action/LiquidHandlerTransferBiomek.action
+++ b/unilabos_msgs/action/LiquidHandlerTransferBiomek.action
@@ -1,5 +1,5 @@
-string source
-string target
+string sources
+string targets
 string tip_rack
 float64 volume
 string aspirate_technique