diff --git a/scripts/_common.sh b/scripts/_common.sh
index d4ee246..2eab5a8 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -5,7 +5,7 @@
 #=================================================
 
 # dependencies used by the app
-pkg_dependencies="postgresql postgresql-contrib apt-transport-https"
+pkg_dependencies="postgresql postgresql-contrib"
 
 nodejs_version=14
 
diff --git a/scripts/install b/scripts/install
index a049c8c..c88762f 100644
--- a/scripts/install
+++ b/scripts/install
@@ -127,10 +127,8 @@ popd || ynh_die
 ynh_script_progression --message="Configuring Etherpad..." --weight=60
 
 ynh_add_config --template="../conf/settings.json" --destination="$final_path/settings.json"
-ynh_store_file_checksum --file="$final_path/settings.json"
 
 ynh_add_config --template="../conf/credentials.json" --destination="$final_path/credentials.json"
-ynh_store_file_checksum --file="$final_path/credentials.json"
 
 #=================================================
 # GENERIC FINALIZATION
diff --git a/scripts/upgrade b/scripts/upgrade
index 0fb973a..ee6b278 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -126,13 +126,9 @@ ynh_install_nodejs --nodejs_version=$nodejs_version
 #=================================================
 ynh_script_progression --message="Reconfiguring Etherpad..." --weight=6
 
-ynh_backup_if_checksum_is_different --file="$final_path/settings.json"
 ynh_add_config --template="../conf/settings.json" --destination="$final_path/settings.json"
-ynh_store_file_checksum --file="$final_path/settings.json"
 
-ynh_backup_if_checksum_is_different --file="$final_path/credentials.json"
 ynh_add_config --template="../conf/credentials.json" --destination="$final_path/credentials.json"
-ynh_store_file_checksum --file="$final_path/credentials.json"
 
 #=================================================
 # INSTALL ETHERPAD