diff --git a/manifest.json b/manifest.json
index 6c9fb57..9dc454a 100644
--- a/manifest.json
+++ b/manifest.json
@@ -14,7 +14,7 @@
         "email": "josue@tille.ch"
     },
     "requirements": {
-        "yunohost": ">= 3.3.1"
+        "yunohost": ">= 3.5.2.2"
     },
     "multi_instance": false,
     "services": [
diff --git a/scripts/experimental_helper.sh b/scripts/experimental_helper.sh
index 190d993..ca73ea7 100644
--- a/scripts/experimental_helper.sh
+++ b/scripts/experimental_helper.sh
@@ -127,46 +127,3 @@ ynh_remove_uwsgi_service () {
 #=================================================
 # OTHERS HELPERS
 #=================================================
-
-# Read the value of a key in a ynh manifest file
-#
-# usage: ynh_read_manifest manifest key
-# | arg: manifest - Path of the manifest to read
-# | arg: key - Name of the key to find
-ynh_read_manifest () {
-    manifest="$1"
-    key="$2"
-    python3 -c "import sys, json;print(json.load(open('$manifest', encoding='utf-8'))['$key'])"
-}
-
-# Read the upstream version from the manifest 
-# The version number in the manifest is defined by <upstreamversion>~ynh<packageversion>
-# For example : 4.3-2~ynh3
-# This include the number before ~ynh
-# In the last example it return 4.3-2
-#
-# usage: ynh_app_upstream_version
-ynh_app_upstream_version () {
-    manifest_path="../manifest.json"
-    if [ ! -e "$manifest_path" ]; then
-        manifest_path="../settings/manifest.json"	# Into the restore script, the manifest is not at the same place
-    fi
-    version_key=$(ynh_read_manifest "$manifest_path" "version")
-    echo "${version_key/~ynh*/}"
-}
-
-# Read package version from the manifest
-# The version number in the manifest is defined by <upstreamversion>~ynh<packageversion>
-# For example : 4.3-2~ynh3
-# This include the number after ~ynh
-# In the last example it return 3
-#
-# usage: ynh_app_package_version
-ynh_app_package_version () {
-    manifest_path="../manifest.json"
-    if [ ! -e "$manifest_path" ]; then
-        manifest_path="../settings/manifest.json"	# Into the restore script, the manifest is not at the same place
-    fi
-    version_key=$(ynh_read_manifest "$manifest_path" "version")
-    echo "${version_key/*~ynh/}"
-}