diff --git a/roles/custom/matrix-bridge-mautrix-bluesky/defaults/main.yml b/roles/custom/matrix-bridge-mautrix-bluesky/defaults/main.yml
index 686860573..6f39551a2 100644
--- a/roles/custom/matrix-bridge-mautrix-bluesky/defaults/main.yml
+++ b/roles/custom/matrix-bridge-mautrix-bluesky/defaults/main.yml
@@ -189,7 +189,7 @@ matrix_mautrix_bluesky_registration_yaml: |
   rate_limited: false
   de.sorunome.msc2409.push_ephemeral: true
   receive_ephemeral: true
-  io.element.msc4190: {{ matrix_mautrix_bluesky_msc4190_enabled }}
+  io.element.msc4190: {{ matrix_mautrix_bluesky_msc4190_enabled | to_json }}
 
 matrix_mautrix_bluesky_registration: "{{ matrix_mautrix_bluesky_registration_yaml | from_yaml }}"
 
diff --git a/roles/custom/matrix-bridge-mautrix-gmessages/defaults/main.yml b/roles/custom/matrix-bridge-mautrix-gmessages/defaults/main.yml
index 79ed8b976..ea504beeb 100644
--- a/roles/custom/matrix-bridge-mautrix-gmessages/defaults/main.yml
+++ b/roles/custom/matrix-bridge-mautrix-gmessages/defaults/main.yml
@@ -214,6 +214,6 @@ matrix_mautrix_gmessages_registration_yaml: |
       - exclusive: true
         regex: '^@{{ matrix_mautrix_gmessages_appservice_bot_username | regex_escape }}:{{ matrix_mautrix_gmessages_homeserver_domain | regex_escape }}$'
   de.sorunome.msc2409.push_ephemeral: true
-  io.element.msc4190: {{ matrix_mautrix_gmessages_msc4190_enabled }}
+  io.element.msc4190: {{ matrix_mautrix_gmessages_msc4190_enabled | to_json }}
 
 matrix_mautrix_gmessages_registration: "{{ matrix_mautrix_gmessages_registration_yaml | from_yaml }}"
diff --git a/roles/custom/matrix-bridge-mautrix-meta-instagram/defaults/main.yml b/roles/custom/matrix-bridge-mautrix-meta-instagram/defaults/main.yml
index 4ecf84acb..e0058562e 100644
--- a/roles/custom/matrix-bridge-mautrix-meta-instagram/defaults/main.yml
+++ b/roles/custom/matrix-bridge-mautrix-meta-instagram/defaults/main.yml
@@ -299,6 +299,6 @@ matrix_mautrix_meta_instagram_registration_yaml: |
   sender_localpart: _bot_{{ matrix_mautrix_meta_instagram_appservice_username }}
   rate_limited: false
   de.sorunome.msc2409.push_ephemeral: true
-  io.element.msc4190: {{ matrix_mautrix_meta_instagram_msc4190_enabled }}
+  io.element.msc4190: {{ matrix_mautrix_meta_instagram_msc4190_enabled | to_json }}
 
 matrix_mautrix_meta_instagram_registration: "{{ matrix_mautrix_meta_instagram_registration_yaml | from_yaml }}"
diff --git a/roles/custom/matrix-bridge-mautrix-meta-messenger/defaults/main.yml b/roles/custom/matrix-bridge-mautrix-meta-messenger/defaults/main.yml
index 3c4ee3d66..69e19e730 100644
--- a/roles/custom/matrix-bridge-mautrix-meta-messenger/defaults/main.yml
+++ b/roles/custom/matrix-bridge-mautrix-meta-messenger/defaults/main.yml
@@ -299,6 +299,6 @@ matrix_mautrix_meta_messenger_registration_yaml: |
   sender_localpart: _bot_{{ matrix_mautrix_meta_messenger_appservice_username }}
   rate_limited: false
   de.sorunome.msc2409.push_ephemeral: true
-  io.element.msc4190: {{ matrix_mautrix_meta_messenger_msc4190_enabled }}
+  io.element.msc4190: {{ matrix_mautrix_meta_messenger_msc4190_enabled | to_json }}
 
 matrix_mautrix_meta_messenger_registration: "{{ matrix_mautrix_meta_messenger_registration_yaml | from_yaml }}"
diff --git a/roles/custom/matrix-bridge-mautrix-signal/defaults/main.yml b/roles/custom/matrix-bridge-mautrix-signal/defaults/main.yml
index 04ecceea8..e47609ced 100644
--- a/roles/custom/matrix-bridge-mautrix-signal/defaults/main.yml
+++ b/roles/custom/matrix-bridge-mautrix-signal/defaults/main.yml
@@ -212,7 +212,7 @@ matrix_mautrix_signal_registration_yaml: |
       - exclusive: true
         regex: '^@{{ matrix_mautrix_signal_appservice_bot_username | regex_escape }}:{{ matrix_mautrix_signal_homeserver_domain | regex_escape }}$'
   de.sorunome.msc2409.push_ephemeral: true
-  io.element.msc4190: {{ matrix_mautrix_signal_msc4190_enabled }}
+  io.element.msc4190: {{ matrix_mautrix_signal_msc4190_enabled | to_json }}
 
 matrix_mautrix_signal_registration: "{{ matrix_mautrix_signal_registration_yaml | from_yaml }}"
 
diff --git a/roles/custom/matrix-bridge-mautrix-slack/defaults/main.yml b/roles/custom/matrix-bridge-mautrix-slack/defaults/main.yml
index fcc7ca3e1..4e701da83 100644
--- a/roles/custom/matrix-bridge-mautrix-slack/defaults/main.yml
+++ b/roles/custom/matrix-bridge-mautrix-slack/defaults/main.yml
@@ -153,7 +153,7 @@ matrix_mautrix_slack_registration_yaml: |
       - exclusive: true
         regex: '^@{{ matrix_mautrix_slack_appservice_bot_username | regex_escape }}:{{ matrix_mautrix_slack_homeserver_domain | regex_escape }}$'
   de.sorunome.msc2409.push_ephemeral: true
-  io.element.msc4190: {{ matrix_mautrix_slack_msc4190_enabled }}
+  io.element.msc4190: {{ matrix_mautrix_slack_msc4190_enabled | to_json }}
 
 matrix_mautrix_slack_registration: "{{ matrix_mautrix_slack_registration_yaml | from_yaml }}"
 
diff --git a/roles/custom/matrix-bridge-mautrix-twitter/defaults/main.yml b/roles/custom/matrix-bridge-mautrix-twitter/defaults/main.yml
index 118d1b59c..9f7b1a964 100644
--- a/roles/custom/matrix-bridge-mautrix-twitter/defaults/main.yml
+++ b/roles/custom/matrix-bridge-mautrix-twitter/defaults/main.yml
@@ -198,7 +198,7 @@ matrix_mautrix_twitter_registration_yaml: |
   rate_limited: false
   de.sorunome.msc2409.push_ephemeral: true
   receive_ephemeral: true
-  io.element.msc4190: {{ matrix_mautrix_twitter_msc4190_enabled }}
+  io.element.msc4190: {{ matrix_mautrix_twitter_msc4190_enabled | to_json }}
 
 matrix_mautrix_twitter_registration: "{{ matrix_mautrix_twitter_registration_yaml | from_yaml }}"
 
diff --git a/roles/custom/matrix-bridge-mautrix-whatsapp/defaults/main.yml b/roles/custom/matrix-bridge-mautrix-whatsapp/defaults/main.yml
index ebc8388c4..e7cce9cc8 100644
--- a/roles/custom/matrix-bridge-mautrix-whatsapp/defaults/main.yml
+++ b/roles/custom/matrix-bridge-mautrix-whatsapp/defaults/main.yml
@@ -231,6 +231,6 @@ matrix_mautrix_whatsapp_registration_yaml: |
       - exclusive: true
         regex: '^@{{ matrix_mautrix_whatsapp_appservice_bot_username | regex_escape }}:{{ matrix_mautrix_whatsapp_homeserver_domain | regex_escape }}$'
   de.sorunome.msc2409.push_ephemeral: true
-  io.element.msc4190: {{ matrix_mautrix_whatsapp_msc4190_enabled }}
+  io.element.msc4190: {{ matrix_mautrix_whatsapp_msc4190_enabled | to_json }}
 
 matrix_mautrix_whatsapp_registration: "{{ matrix_mautrix_whatsapp_registration_yaml | from_yaml }}"