diff --git a/manifest.json b/manifest.json
index 6ad59f3..d846fba 100644
--- a/manifest.json
+++ b/manifest.json
@@ -14,7 +14,7 @@
         "email": "cyp@rouquin.me"
     },
     "requirements": {
-        "yunohost": ">= 4.1.0"
+        "yunohost": ">= 4.2.7"
     },
     "multi_instance": true,
     "services": [
diff --git a/scripts/_ynh_permission_has_user.sh b/scripts/_ynh_permission_has_user.sh
deleted file mode 100644
index ae04fbc..0000000
--- a/scripts/_ynh_permission_has_user.sh
+++ /dev/null
@@ -1,28 +0,0 @@
-#!/bin/bash
-
-ynh_permission_has_user() {
-    local legacy_args=pu
-    # Declare an array to define the options of this helper.
-    local -A args_array=( [p]=permission= [u]=user= )
-    local permission
-    local user
-    # Manage arguments with getopts
-    ynh_handle_getopts_args "$@"
-
-    if ! ynh_permission_exists --permission=$permission
-    then
-        return 1
-    fi
-
-    # Check both allowed and corresponding_users sections in the json
-    for section in "allowed" "corresponding_users"
-    do
-        if yunohost user permission info "$app.$permission" --output-as json --quiet \
-            | jq -e --arg user $user --arg section $section '.[$section] | index($user)' >/dev/null
-        then
-            return 0
-        fi
-    done
-
-    return 1
-}
\ No newline at end of file
diff --git a/scripts/upgrade b/scripts/upgrade
index 27143e2..2fb6f35 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -8,7 +8,6 @@
 
 source _common.sh
 source /usr/share/yunohost/helpers
-source _ynh_permission_has_user.sh
 
 #=================================================
 # LOAD SETTINGS