diff --git a/roles/matrix-dendrite/defaults/main.yml b/roles/matrix-dendrite/defaults/main.yml
index dd6d351ed..f3987af9b 100644
--- a/roles/matrix-dendrite/defaults/main.yml
+++ b/roles/matrix-dendrite/defaults/main.yml
@@ -89,6 +89,7 @@ matrix_dendrite_registration_disabled: false
 matrix_dendrite_enable_registration_captcha: false
 matrix_dendrite_recaptcha_public_key: ""
 matrix_dendrite_recaptcha_private_key: ""
+matrix_dendrite_recaptcha_siteverify_api: "https://www.google.com/recaptcha/api/siteverify"
 
 # A list of additional "volumes" to mount in the container.
 # This list gets populated dynamically based on Dendrite extensions that have been enabled.
diff --git a/roles/matrix-dendrite/templates/dendrite/dendrite.yaml.j2 b/roles/matrix-dendrite/templates/dendrite/dendrite.yaml.j2
index 29f5c55f0..62f8caba7 100644
--- a/roles/matrix-dendrite/templates/dendrite/dendrite.yaml.j2
+++ b/roles/matrix-dendrite/templates/dendrite/dendrite.yaml.j2
@@ -174,7 +174,7 @@ client_api:
   recaptcha_public_key: {{ matrix_dendrite_recaptcha_public_key|to_json }}
   recaptcha_private_key: {{ matrix_dendrite_recaptcha_private_key|to_json }}
   recaptcha_bypass_secret: ""
-  recaptcha_siteverify_api: ""
+  recaptcha_siteverify_api: {{ matrix_dendrite_recaptcha_siteverify_api|to_json }}
 
   # TURN server information that this homeserver should send to clients.
   turn: