diff --git a/manifest.json b/manifest.json
index 7e7f94b..77bf8df 100644
--- a/manifest.json
+++ b/manifest.json
@@ -23,7 +23,7 @@
         "mysql"
     ],
     "requirements": {
-        "yunohost": ">= 2.7.14"
+        "yunohost": ">= 3.4.2"
     },
     "arguments": {
         "install": [
diff --git a/scripts/_common.sh b/scripts/_common.sh
index 213895b..e71d756 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -60,8 +60,6 @@ install_source() {
 install_dependance() {
 	ynh_install_app_dependencies python2.7 python-pip libpython2.7 python-setuptools python-ldap python-urllib3 python-simplejson python-imaging python-mysqldb python-flup expect python-requests python-dev ffmpeg python-memcache \
         libjpeg62-turbo-dev zlib1g-dev # For building pillow
-	# Upgrade setuptools for jessie because the new moviepy package is not compatible with setuptools 5.x
-	[ "$(lsb_release --codename --short)" = "jessie" ] && pip install --upgrade setuptools
 	pip install --upgrade 'Pillow==4.3.0' moviepy
 }
 
diff --git a/scripts/experimental_helper.sh b/scripts/experimental_helper.sh
index d9151a1..8f03a4b 100644
--- a/scripts/experimental_helper.sh
+++ b/scripts/experimental_helper.sh
@@ -54,14 +54,3 @@ ynh_app_package_version () {
     version_key=$(ynh_read_manifest "$manifest_path" "version")
     echo "${version_key/*~ynh/}"
 }
-
-# Delete a file checksum from the app settings
-#
-# $app should be defined when calling this helper
-#
-# usage: ynh_remove_file_checksum file
-# | arg: file - The file for which the checksum will be deleted
-ynh_delete_file_checksum () {
-	local checksum_setting_name=checksum_${1//[\/ ]/_}	# Replace all '/' and ' ' by '_'
-	ynh_app_setting_delete $app $checksum_setting_name
-}