diff --git a/simulators/gaia/__init__.py b/simulators/gaia/__init__.py
index 0132d8b..85ffa29 100644
--- a/simulators/gaia/__init__.py
+++ b/simulators/gaia/__init__.py
@@ -11,7 +11,7 @@
 # is the tuple that defines the optional sending node that exposes the
 # subscribe and unsubscribe methods, while kwargs is a dict of optional
 # extra arguments.
-servers = [(('0.0.0.0', 12600), (), ThreadingUDPServer, {})]
+servers = [(('0.0.0.0', 12400), (), ThreadingUDPServer, {})]
 
 
 class System(ListeningSystem):