diff --git a/simulation.py b/simulation.py
index 542b501..48fcef6 100644
--- a/simulation.py
+++ b/simulation.py
@@ -1,7 +1,7 @@
 # a funny python file
 
 # Simulation of a falling body on Earth
-ACCELERATION_G = 10 # m/s^2
+ACCELERATION_G = 9.80665 # m/s^2
 TIME = 5.0 # seconds
 
 def calculate_displacement(g, t):