diff --git a/system/default_ad_api/src/interface.cpp b/system/default_ad_api/src/interface.cpp
index d53d12afcc499..e0009d5bdc382 100644
--- a/system/default_ad_api/src/interface.cpp
+++ b/system/default_ad_api/src/interface.cpp
@@ -21,7 +21,7 @@ InterfaceNode::InterfaceNode(const rclcpp::NodeOptions & options) : Node("interf
 {
   const auto on_interface_version = [](auto, auto res) {
     res->major = 1;
-    res->minor = 3;
+    res->minor = 4;
     res->patch = 0;
   };
 
diff --git a/system/default_ad_api/test/node/interface_version.py b/system/default_ad_api/test/node/interface_version.py
index 63a79e8722be3..10d00d1dbad30 100644
--- a/system/default_ad_api/test/node/interface_version.py
+++ b/system/default_ad_api/test/node/interface_version.py
@@ -30,7 +30,7 @@
 
 if response.major != 1:
     exit(1)
-if response.minor != 3:
+if response.minor != 4:
     exit(1)
 if response.patch != 0:
     exit(1)