diff --git a/roles/matrix-bot-matrix-registration-bot/defaults/main.yml b/roles/matrix-bot-matrix-registration-bot/defaults/main.yml
index f7e7d314c..3b320747d 100644
--- a/roles/matrix-bot-matrix-registration-bot/defaults/main.yml
+++ b/roles/matrix-bot-matrix-registration-bot/defaults/main.yml
@@ -17,6 +17,7 @@ matrix_bot_matrix_registration_bot_config_path: "{{ matrix_bot_matrix_registrati
 matrix_bot_matrix_registration_bot_bot_server: "https://{{ matrix_server_fqn_matrix }}"
 matrix_bot_matrix_registration_bot_api_base_url: "https://{{ matrix_server_fqn_matrix }}"
 matrix_bot_matrix_registration_bot_logging_level: info
+matrix_bot_matrix_registration_environment_variables_extension: ''
 
 # A list of extra arguments to pass to the container
 matrix_bot_matrix_registration_bot_container_extra_arguments: []
diff --git a/roles/matrix-bot-matrix-registration-bot/templates/env.j2 b/roles/matrix-bot-matrix-registration-bot/templates/env.j2
index 69ea841bc..291f29f9a 100644
--- a/roles/matrix-bot-matrix-registration-bot/templates/env.j2
+++ b/roles/matrix-bot-matrix-registration-bot/templates/env.j2
@@ -4,3 +4,5 @@ BOT_PASSWORD={{ matrix_bot_matrix_registration_bot_matrix_user_password }}
 API_BASE_URL={{ matrix_bot_matrix_registration_bot_api_base_url }}
 API_TOKEN={{ matrix_bot_matrix_registration_bot_matrix_admin_token }}
 LOGGING_LEVEL={{ matrix_bot_matrix_registration_bot_logging_level }}
+
+{{ matrix_bot_matrix_registration_environment_variables_extension }}