diff --git a/conservancy/settings/prod.py b/conservancy/settings/prod.py
index 41b92cfb..9d74476d 100644
--- a/conservancy/settings/prod.py
+++ b/conservancy/settings/prod.py
@@ -43,3 +43,5 @@ STRIPE_ENDPOINT_SECRET = get_secret(secrets, 'STRIPE_ENDPOINT_SECRET')
 
 CAPTCHA_FLITE_PATH = '/usr/bin/flite'
 CAPTCHA_SOX_PATH = '/usr/bin/sox'
+CAPTCHA_LETTER_ROTATION = (-25, 25)
+CAPTCHA_NOISE_FUNCITONS = ('captcha.helpers.noise_dots',)