diff --git a/tmtc/reaction_wheels.py b/tmtc/reaction_wheels.py
index 6a3da07..ce6a9ea 100644
--- a/tmtc/reaction_wheels.py
+++ b/tmtc/reaction_wheels.py
@@ -220,9 +220,9 @@ def pack_set_speed_command(
         pass
 
     if ramp_time_ms < 0 or (
-        ramp_time_ms > 0 and (ramp_time_ms > 10000 or ramp_time_ms < 10)
+        ramp_time_ms > 0 and (ramp_time_ms > 20000 or ramp_time_ms < 10)
     ):
-        raise ValueError("Invalid Ramp Speed time. Allowed range is [10-10000] ms")
+        raise ValueError("Invalid Ramp Speed time. Allowed range is [10-20000] ms")
     command_id = RwCommandIds.SET_SPEED
     command = bytearray()
     command += object_id + command_id