diff --git a/roles/matrix-bridge-mautrix-signal/defaults/main.yml b/roles/matrix-bridge-mautrix-signal/defaults/main.yml
index 161fa892..bdef7fa5 100644
--- a/roles/matrix-bridge-mautrix-signal/defaults/main.yml
+++ b/roles/matrix-bridge-mautrix-signal/defaults/main.yml
@@ -143,3 +143,10 @@ matrix_mautrix_signal_log_level: 'DEBUG'
 matrix_mautrix_signal_bridge_encryption_allow: false
 matrix_mautrix_signal_bridge_encryption_default: "{{ matrix_mautrix_signal_bridge_encryption_allow }}"
 matrix_mautrix_signal_bridge_encryption_key_sharing_allow: "{{ matrix_mautrix_signal_bridge_encryption_allow }}"
+
+# Additional environment variables to pass to the Signal Daemon container
+#
+# Example:
+# matrix_mautrix_signal_daemon_environment_variables_extension: |
+#   SIGNALD_TRUST_NEW_KEYS=true
+matrix_mautrix_signal_daemon_environment_variables_extension: ''
diff --git a/roles/matrix-bridge-mautrix-signal/tasks/setup_install.yml b/roles/matrix-bridge-mautrix-signal/tasks/setup_install.yml
index 3a7ad508..cfc704a8 100644
--- a/roles/matrix-bridge-mautrix-signal/tasks/setup_install.yml
+++ b/roles/matrix-bridge-mautrix-signal/tasks/setup_install.yml
@@ -92,6 +92,15 @@
     - "{{ matrix_mautrix_signal_daemon_path }}/attachments"
     - "{{ matrix_mautrix_signal_daemon_path }}/data"
 
+
+- name: Ensure mautrix-signal-daemon environment variables file created
+  ansible.builtin.template:
+    src: "{{ role_path }}/templates/env.j2"
+    dest: "{{ matrix_mautrix_signal_daemon_path }}/env"
+    owner: "{{ matrix_user_username }}"
+    group: "{{ matrix_user_groupname }}"
+    mode: 0644
+
 - name: Ensure mautrix-signal config.yaml installed
   ansible.builtin.copy:
     content: "{{ matrix_mautrix_signal_configuration | to_nice_yaml(indent=2, width=999999) }}"
diff --git a/roles/matrix-bridge-mautrix-signal/templates/env.j2 b/roles/matrix-bridge-mautrix-signal/templates/env.j2
new file mode 100644
index 00000000..f5357ed2
--- /dev/null
+++ b/roles/matrix-bridge-mautrix-signal/templates/env.j2
@@ -0,0 +1 @@
+{{ matrix_mautrix_signal_daemon_environment_variables_extension }}
diff --git a/roles/matrix-bridge-mautrix-signal/templates/systemd/matrix-mautrix-signal-daemon.service.j2 b/roles/matrix-bridge-mautrix-signal/templates/systemd/matrix-mautrix-signal-daemon.service.j2
index d6be37e9..31e68ea9 100644
--- a/roles/matrix-bridge-mautrix-signal/templates/systemd/matrix-mautrix-signal-daemon.service.j2
+++ b/roles/matrix-bridge-mautrix-signal/templates/systemd/matrix-mautrix-signal-daemon.service.j2
@@ -34,6 +34,7 @@ ExecStartPre=-{{ matrix_host_command_docker }} run --rm --name matrix-mautrix-si
 # We can't use `--read-only` for this bridge.
 ExecStart={{ matrix_host_command_docker }} run --rm --name matrix-mautrix-signal-daemon \
 			--log-driver=none \
+            --env-file={{ matrix_mautrix_signal_daemon_path }}/env \
 			--user={{ matrix_user_uid }}:{{ matrix_user_gid }} \
 			--cap-drop=ALL \
 			--network={{ matrix_docker_network }} \