diff --git a/lgsvl/agent.py b/lgsvl/agent.py
index f9ca63e..f6f26bc 100644
--- a/lgsvl/agent.py
+++ b/lgsvl/agent.py
@@ -424,7 +424,7 @@ def follow(self, waypoints, loop=False, waypoints_path_type="Linear"):
                         "idle": wp.idle,
                         "trigger_distance": wp.trigger_distance,
                         "speed": wp.speed,
-                        "acceleration": wp.acceleration,
+                        "acceleration": wp.acceleration.to_json(),
                         "trigger": (
                             None if wp.trigger is None else wp.trigger.to_json()
                         ),