diff --git a/README.md b/README.md
index 54b1498..cf5562a 100644
--- a/README.md
+++ b/README.md
@@ -23,7 +23,8 @@ A decentralized and federated platform to organize events
 
 
 
-**Shipped version:** 2.1.0.1~ynh3
+**Shipped version:** 2.1.0.1~ynh4
+
 
 **Demo:** https://demo.mobilizon.org
 
diff --git a/README_fr.md b/README_fr.md
index 61e497d..60e272b 100644
--- a/README_fr.md
+++ b/README_fr.md
@@ -23,7 +23,8 @@ A decentralized and federated platform to organize events
 
 
 
-**Version incluse :** 2.1.0.1~ynh3
+**Version incluse :** 2.1.0.1~ynh4
+
 
 **Démo :** https://demo.mobilizon.org
 
diff --git a/manifest.json b/manifest.json
index f57a97e..3cca8dd 100644
--- a/manifest.json
+++ b/manifest.json
@@ -6,7 +6,7 @@
         "en": "A decentralized and federated platform to organize events",
         "fr": "Une plateforme décentralisée et fédérée pour organiser des événements"
     },
-    "version": "2.1.0.1~ynh3",
+    "version": "2.1.0.1~ynh4",
     "url": "https://joinmobilizon.org/",
     "upstream": {
         "license": "AGPL-3.0-or-later",
diff --git a/scripts/upgrade b/scripts/upgrade
index 6042070..60d4cc8 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -248,6 +248,8 @@ ynh_script_progression --message="Updating a configuration file..."
 config="/etc/$app/config.exs"
 
 ynh_backup_if_checksum_is_different --file="$config"
+ynh_replace_string --match_string="adapter: Bamboo.SMTPAdapter," --replace_string="adapter: Swoosh.Adapters.SMTP," --target_file="$config"
+ynh_replace_string --match_string="server: \"127.0.0.1\"," --replace_string="relay: \"127.0.0.1\"," --target_file="$config"
 ynh_store_file_checksum --file="$config"
 
 chmod 400 "$config"