diff --git a/repos/rostackchan.repos b/repos/rostackchan.repos
index beb6772..f9a7db7 100644
--- a/repos/rostackchan.repos
+++ b/repos/rostackchan.repos
@@ -78,7 +78,8 @@ repositories:
   DynamixelSDK:
     type: git
     url: https://github.com/ROBOTIS-GIT/DynamixelSDK.git
-    version
+      version: humble-devel
   dynamixel-workbench:
     type: git
     url: https://github.com/ROBOTIS-GIT/dynamixel-workbench.git
+    version: humble-devel