diff --git a/data/helpers.d/php b/data/helpers.d/php
index 40a023e9d..bf12cd4d6 100644
--- a/data/helpers.d/php
+++ b/data/helpers.d/php
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-readonly YNH_DEFAULT_PHP_VERSION=7.3
+readonly YNH_DEFAULT_PHP_VERSION=7.4
 # Declare the actual PHP version to use.
 # A packager willing to use another version of PHP can override the variable into its _common.sh.
 YNH_PHP_VERSION=${YNH_PHP_VERSION:-$YNH_DEFAULT_PHP_VERSION}
diff --git a/data/hooks/conf_regen/10-apt b/data/hooks/conf_regen/10-apt
index bb5caf67f..c7d1f0174 100755
--- a/data/hooks/conf_regen/10-apt
+++ b/data/hooks/conf_regen/10-apt
@@ -53,8 +53,8 @@ Pin-Priority: -1
 do_post_regen() {
   regen_conf_files=$1
 
-  # Make sure php7.3 is the default version when using php in cli
-  update-alternatives --set php /usr/bin/php7.3
+  # Make sure php7.4 is the default version when using php in cli
+  update-alternatives --set php /usr/bin/php7.4
 }
 
 FORCE=${2:-0}
diff --git a/data/templates/yunohost/services.yml b/data/templates/yunohost/services.yml
index 7df563c67..b6ce7c117 100644
--- a/data/templates/yunohost/services.yml
+++ b/data/templates/yunohost/services.yml
@@ -22,9 +22,9 @@ nginx:
   test_conf: nginx -t
   needs_exposed_ports: [80, 443]
   category: web
-php7.3-fpm:
-  log: /var/log/php7.3-fpm.log
-  test_conf: php-fpm7.3 --test
+php7.4-fpm:
+  log: /var/log/php7.4-fpm.log
+  test_conf: php-fpm7.4 --test
   category: web
 postfix:
   log: [/var/log/mail.log,/var/log/mail.err]
diff --git a/locales/ca.json b/locales/ca.json
index 189053d94..0f0b60426 100644
--- a/locales/ca.json
+++ b/locales/ca.json
@@ -572,7 +572,7 @@
     "migration_description_0015_migrate_to_buster": "Actualitza els sistema a Debian Buster i YunoHost 4.x",
     "regenconf_need_to_explicitly_specify_ssh": "La configuració ssh ha estat modificada manualment, però heu d'especificar explícitament la categoria «ssh» amb --force per fer realment els canvis.",
     "migration_0015_weak_certs": "S'han trobat els següents certificats que encara utilitzen algoritmes de signatura febles i s'han d'actualitzar per a ser compatibles amb la propera versió de nginx: {certs}",
-    "service_description_php7.3-fpm": "Executa aplicacions escrites en PHP amb NGINX",
+    "service_description_php7.4-fpm": "Executa aplicacions escrites en PHP amb NGINX",
     "migration_0018_failed_to_reset_legacy_rules": "No s'ha pogut restaurar les regles legacy iptables: {error}",
     "migration_0018_failed_to_migrate_iptables_rules": "No s'ha pogut migrar les regles legacy iptables a nftables: {error}",
     "migration_0017_not_enough_space": "Feu suficient espai disponible en {path} per a realitzar la migració.",
diff --git a/locales/en.json b/locales/en.json
index 84a01dfaa..813688a87 100644
--- a/locales/en.json
+++ b/locales/en.json
@@ -562,7 +562,7 @@
     "service_description_metronome": "Manage XMPP instant messaging accounts",
     "service_description_mysql": "Stores app data (SQL database)",
     "service_description_nginx": "Serves or provides access to all the websites hosted on your server",
-    "service_description_php7.3-fpm": "Runs apps written in PHP with NGINX",
+    "service_description_php7.4-fpm": "Runs apps written in PHP with NGINX",
     "service_description_postfix": "Used to send and receive e-mails",
     "service_description_redis-server": "A specialized database used for rapid data access, task queue, and communication between programs",
     "service_description_rspamd": "Filters spam, and other e-mail related features",
diff --git a/locales/fr.json b/locales/fr.json
index 715d82a35..130f91129 100644
--- a/locales/fr.json
+++ b/locales/fr.json
@@ -574,7 +574,7 @@
     "migration_0015_weak_certs": "Il a été constaté que les certificats suivants utilisent encore des algorithmes de signature peu robustes et doivent être mis à jour pour être compatibles avec la prochaine version de NGINX : {certs}",
     "global_settings_setting_backup_compress_tar_archives": "Compresser les archives (.tar.gz) au lieu des archives non-compressées lors de la création des backups. N.B. : activer cette option permet d'obtenir des sauvegardes plus légères, mais leur création sera significativement plus longue et plus gourmande en CPU.",
     "migration_description_0018_xtable_to_nftable": "Migrer les anciennes règles de trafic réseau vers le nouveau système basé sur nftables",
-    "service_description_php7.3-fpm": "Exécute les applications écrites en PHP avec NGINX",
+    "service_description_php7.4-fpm": "Exécute les applications écrites en PHP avec NGINX",
     "migration_0018_failed_to_reset_legacy_rules": "La réinitialisation des règles iptable par défaut a échoué : {error}",
     "migration_0018_failed_to_migrate_iptables_rules": "Échec de la migration des anciennes règles iptables vers nftables : {error}",
     "migration_0017_not_enough_space": "Laissez suffisamment d'espace disponible dans {path} avant de lancer la migration.",
diff --git a/locales/it.json b/locales/it.json
index 6b15dd900..d160997df 100644
--- a/locales/it.json
+++ b/locales/it.json
@@ -424,7 +424,7 @@
     "service_description_rspamd": "Filtra SPAM, e altre funzionalità legate alle mail",
     "service_description_redis-server": "Un database specializzato usato per un veloce accesso ai dati, task queue, e comunicazioni tra programmi",
     "service_description_postfix": "Usato per inviare e ricevere email",
-    "service_description_php7.3-fpm": "Esegue app scritte in PHP con NGINX",
+    "service_description_php7.4-fpm": "Esegue app scritte in PHP con NGINX",
     "service_description_nginx": "Serve o permette l'accesso a tutti i siti pubblicati sul tuo server",
     "service_description_mysql": "Memorizza i dati delle app (database SQL)",
     "service_description_metronome": "Gestisce gli account di messaggistica instantanea XMPP",
diff --git a/src/yunohost/app.py b/src/yunohost/app.py
index 5f001c12a..62a339315 100644
--- a/src/yunohost/app.py
+++ b/src/yunohost/app.py
@@ -3410,10 +3410,10 @@ def _assert_system_is_sane_for_app(manifest, when):
 
     services = manifest.get("services", [])
 
-    # Some apps use php-fpm or php5-fpm which is now php7.0-fpm
+    # Some apps use php-fpm, php5-fpm or php7.x-fpm which is now php7.4-fpm
     def replace_alias(service):
-        if service in ["php-fpm", "php5-fpm", "php7.0-fpm"]:
-            return "php7.3-fpm"
+        if service in ["php-fpm", "php5-fpm", "php7.0-fpm", "php7.3-fpm"]:
+            return "php7.4-fpm"
         else:
             return service
 
@@ -3422,7 +3422,7 @@ def _assert_system_is_sane_for_app(manifest, when):
     # We only check those, mostly to ignore "custom" services
     # (added by apps) and because those are the most popular
     # services
-    service_filter = ["nginx", "php7.3-fpm", "mysql", "postfix"]
+    service_filter = ["nginx", "php7.4-fpm", "mysql", "postfix"]
     services = [str(s) for s in services if s in service_filter]
 
     if "nginx" not in services:
@@ -3465,19 +3465,22 @@ def _assert_system_is_sane_for_app(manifest, when):
 
 
 LEGACY_PHP_VERSION_REPLACEMENTS = [
-    ("/etc/php5", "/etc/php/7.3"),
-    ("/etc/php/7.0", "/etc/php/7.3"),
-    ("/var/run/php5-fpm", "/var/run/php/php7.3-fpm"),
-    ("/var/run/php/php7.0-fpm", "/var/run/php/php7.3-fpm"),
-    ("php5", "php7.3"),
-    ("php7.0", "php7.3"),
+    ("/etc/php5", "/etc/php/7.4"),
+    ("/etc/php/7.0", "/etc/php/7.4"),
+    ("/etc/php/7.3", "/etc/php/7.4"),
+    ("/var/run/php5-fpm", "/var/run/php/php7.4-fpm"),
+    ("/var/run/php/php7.0-fpm", "/var/run/php/php7.4-fpm"),
+    ("/var/run/php/php7.3-fpm", "/var/run/php/php7.4-fpm"),
+    ("php5", "php7.4"),
+    ("php7.0", "php7.4"),
+    ("php7.3", "php7.4"),
     (
         'phpversion="${phpversion:-7.0}"',
-        'phpversion="${phpversion:-7.3}"',
+        'phpversion="${phpversion:-7.4}"',
     ),  # Many helpers like the composer ones use 7.0 by default ...
     (
         '"$phpversion" == "7.0"',
-        '$(bc <<< "$phpversion >= 7.3") -eq 1',
+        '$(bc <<< "$phpversion >= 7.4") -eq 1',
     ),  # patch ynh_install_php to refuse installing/removing php <= 7.3
 ]
 
@@ -3514,11 +3517,11 @@ def _patch_legacy_php_versions_in_settings(app_folder):
     settings = read_yaml(os.path.join(app_folder, "settings.yml"))
 
     if settings.get("fpm_config_dir") == "/etc/php/7.0/fpm":
-        settings["fpm_config_dir"] = "/etc/php/7.3/fpm"
+        settings["fpm_config_dir"] = "/etc/php/7.4/fpm"
     if settings.get("fpm_service") == "php7.0-fpm":
-        settings["fpm_service"] = "php7.3-fpm"
+        settings["fpm_service"] = "php7.4-fpm"
     if settings.get("phpversion") == "7.0":
-        settings["phpversion"] = "7.3"
+        settings["phpversion"] = "7.4"
 
     # We delete these checksums otherwise the file will appear as manually modified
     list_to_remove = ["checksum__etc_php_7.0_fpm_pool", "checksum__etc_nginx_conf.d"]
diff --git a/src/yunohost/backup.py b/src/yunohost/backup.py
index 3978e835d..862c07690 100644
--- a/src/yunohost/backup.py
+++ b/src/yunohost/backup.py
@@ -1183,7 +1183,7 @@ class RestoreManager:
 
     def _patch_legacy_php_versions_in_csv_file(self):
         """
-        Apply dirty patch to redirect php5 and php7.0 files to php7.3
+        Apply dirty patch to redirect php5 and php7.0 files to php7.4
         """
 
         backup_csv = os.path.join(self.work_dir, "backup.csv")