diff --git a/scripts/install b/scripts/install
index 08d7760..9d3a30c 100644
--- a/scripts/install
+++ b/scripts/install
@@ -70,7 +70,7 @@ ynh_app_setting_set --app=$app --key=port --value=$port
 ynh_script_progression --message="Installing dependencies..."
 
 ynh_exec_warn_less ynh_install_app_dependencies $pkg_dependencies
-ynh_exec_warn_less ynh_install_extra_app_dependencies --repo="deb http://deb.debian.org/debian/ buster main contrib" --package=$contrib_dependencies
+ynh_exec_warn_less ynh_install_extra_app_dependencies --repo="deb http://deb.debian.org/debian/ buster main contrib" --package=$contrib_dependencies --key="https://ftp-master.debian.org/keys/release-$(lsb_release --release --short).asc"
 
 #=================================================
 # CREATE DEDICATED USER
@@ -130,7 +130,7 @@ apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys CB2DE8E5 2>/de
 # restart nginx and the whole webadmin and maybe even the yunohost command
 # running the install ...
 
-ynh_install_extra_app_dependencies --repo="https://download.onlyoffice.com/repo/debian squeeze main" --package=$extra_dependencies 2>/dev/null
+ynh_install_extra_app_dependencies --repo="https://download.onlyoffice.com/repo/debian squeeze main" --package=$extra_dependencies --key="https://ftp-master.debian.org/keys/release-$(lsb_release --release --short).asc"
 
 #=================================================
 # ADD A CONFIGURATION
diff --git a/scripts/restore b/scripts/restore
index 2691c8e..c63df84 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -60,7 +60,7 @@ ynh_script_progression --message="Reinstalling dependencies..."
 
 # Define and install dependencies
 ynh_exec_warn_less ynh_install_app_dependencies $pkg_dependencies
-ynh_exec_warn_less ynh_install_extra_app_dependencies --repo="deb http://deb.debian.org/debian/ buster main contrib" --package=$contrib_dependencies
+ynh_exec_warn_less ynh_install_extra_app_dependencies --repo="deb http://deb.debian.org/debian/ buster main contrib" --package=$contrib_dependencies --key="https://ftp-master.debian.org/keys/release-$(lsb_release --release --short).asc"
 
 #=================================================
 # RESTORE THE NGINX CONFIGURATION
@@ -96,7 +96,7 @@ ynh_script_progression --message="Reinstalling OnlyOffice..."
 
 apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys CB2DE8E5
 
-ynh_install_extra_app_dependencies --repo="https://download.onlyoffice.com/repo/debian squeeze main" --package=$extra_dependencies 
+ynh_install_extra_app_dependencies --repo="https://download.onlyoffice.com/repo/debian squeeze main" --package=$extra_dependencies --key="https://ftp-master.debian.org/keys/release-$(lsb_release --release --short).asc"
 
 #=================================================
 # RESTORE THE CONFIGURATION
diff --git a/scripts/upgrade b/scripts/upgrade
index ac705ea..1a32e7a 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -95,7 +95,7 @@ ynh_system_user_create --username=$app --home_dir="$final_path"
 ynh_script_progression --message="Upgrading dependencies..."
 
 ynh_exec_warn_less ynh_install_app_dependencies $pkg_dependencies
-ynh_exec_warn_less ynh_install_extra_app_dependencies --repo="deb http://deb.debian.org/debian/ buster main contrib" --package=$contrib_dependencies
+ynh_exec_warn_less ynh_install_extra_app_dependencies --repo="deb http://deb.debian.org/debian/ buster main contrib" --package=$contrib_dependencies --key="https://ftp-master.debian.org/keys/release-$(lsb_release --release --short).asc"
 
 #=================================================
 # NGINX CONFIGURATION
@@ -134,7 +134,7 @@ ynh_remove_extra_repo --name="$app" # backward compat
 apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys CB2DE8E5
 
 # ynh_remove_app_dependencies
-ynh_install_extra_app_dependencies --repo="https://download.onlyoffice.com/repo/debian squeeze main" --package=$extra_dependencies 
+ynh_install_extra_app_dependencies --repo="https://download.onlyoffice.com/repo/debian squeeze main" --package=$extra_dependencies --key="https://ftp-master.debian.org/keys/release-$(lsb_release --release --short).asc"
 
 #=================================================
 # UPDATE A CONFIG FILE