diff --git a/conf/amd64.src b/conf/amd64.src
index 8840e83..833f81a 100644
--- a/conf/amd64.src
+++ b/conf/amd64.src
@@ -2,5 +2,6 @@ SOURCE_URL=https://dl.vikunja.io/api/0.18.1/vikunja-v0.18.1-linux-amd64-full
 SOURCE_SUM=fd259ae3c717bea715e96d0806ac08f2bd462068277ab2b62ebee36fe946f0e2
 SOURCE_SUM_PRG=sha256sum
 SOURCE_IN_SUBDIR=false
+SOURCE_FORMAT=zip
 SOURCE_FILENAME=vikunja
-SOURCE_EXTRACT=false
+SOURCE_EXTRACT=true
diff --git a/conf/arm64.src b/conf/arm64.src
index ffae117..3c1f538 100644
--- a/conf/arm64.src
+++ b/conf/arm64.src
@@ -2,5 +2,6 @@ SOURCE_URL=https://dl.vikunja.io/api/0.18.1/vikunja-v0.18.1-linux-arm64-full
 SOURCE_SUM=c54c6d70b348c1697ff8519d522f2b1e3c58ffb4401ac1f4c2e729913b392a27
 SOURCE_SUM_PRG=sha256sum
 SOURCE_IN_SUBDIR=false
+SOURCE_FORMAT=zip
 SOURCE_FILENAME=vikunja
-SOURCE_EXTRACT=false
+SOURCE_EXTRACT=true
diff --git a/conf/armhf.src b/conf/armhf.src
index 55c08ee..70c5015 100644
--- a/conf/armhf.src
+++ b/conf/armhf.src
@@ -2,5 +2,6 @@ SOURCE_URL=https://dl.vikunja.io/api/0.18.1/vikunja-v0.18.1-linux-arm-7-full
 SOURCE_SUM=79548e506538319f8aab07a5630c3c2032906b34386a83c26d1a6cfc9993b39c
 SOURCE_SUM_PRG=sha256sum
 SOURCE_IN_SUBDIR=false
+SOURCE_FORMAT=zip
 SOURCE_FILENAME=vikunja
-SOURCE_EXTRACT=false
+SOURCE_EXTRACT=true
diff --git a/scripts/backup b/scripts/backup
index 2eaa6b2..4649990 100644
--- a/scripts/backup
+++ b/scripts/backup
@@ -36,8 +36,12 @@ ynh_print_info --message="Declaring files to be backed up..."
 # BACKUP THE APP MAIN DIR
 #=================================================
 
+# Frontend
 ynh_backup --src_path="$final_path"
 
+# Backend
+ynh_backup --src_path="/opt/vikunja"
+
 #=================================================
 # BACKUP THE NGINX CONFIGURATION
 #=================================================
diff --git a/scripts/install b/scripts/install
index ab2a509..e8651c9 100644
--- a/scripts/install
+++ b/scripts/install
@@ -91,28 +91,30 @@ ynh_psql_test_if_first_run
 ynh_psql_setup_db --db_user=$db_user --db_name=$db_name
 
 #=================================================
-# DOWNLOAD, CHECK AND UNPACK SOURCE
+# INSTALL FRONTEND
 #=================================================
-ynh_script_progression --message="Setting up source files..." --weight=1
+ynh_script_progression --message="Setting up frontend..." --weight=1
 
 ynh_app_setting_set --app=$app --key=final_path --value=$final_path
 # Download, check integrity, uncompress and patch the source from app.src
 ynh_setup_source --dest_dir="$final_path" --source_id="front"
-ynh_setup_source --dest_dir="$final_path/vikunja" --source_id="$architecture"
 
 chmod 750 "$final_path"
 chmod -R o-rwx "$final_path"
 chown -R $app:www-data "$final_path"
 
 #=================================================
-# DOWNLOAD, CHECK AND UNPACK SOURCE
+# INSTALL BACKEND
 #=================================================
-ynh_script_progression --message="Setting up source files..." --weight=1
+ynh_script_progression --message="Setting up backend..." --weight=1
 
 # Download, check integrity, uncompress and patch the source from app.src
 mkdir -p "/opt/vikunja"
 mkdir -p "/opt/vikunja/files"
-ynh_setup_source --dest_dir="/opt/vikunja" --source_id="$architecture"
+tempdir="$(mktemp -d)"
+ynh_setup_source --dest_dir=$tempdir --source_id="$architecture"
+back="$(find $tempdir -name "vikunja-*" \! -name "*.sha256")"
+cp "$back" "/opt/vikunja/vikunja"
 
 chmod +x "/opt/vikunja/vikunja"
 chown -R $app:www-data "/opt/vikunja/files"
diff --git a/scripts/remove b/scripts/remove
index 71e049d..9fcba45 100644
--- a/scripts/remove
+++ b/scripts/remove
@@ -92,6 +92,14 @@ ynh_script_progression --message="Removing the dedicated system user..." --weigh
 # Delete a system user
 ynh_system_user_delete --username=$app
 
+#=================================================
+# REMOVE BACKEND
+#=================================================
+ynh_script_progression --message="Removing backend..." --weight=1
+
+# Delete /opt/vikunja
+rm -rf "/opt/vikunja"
+
 #=================================================
 # END OF SCRIPT
 #=================================================
diff --git a/scripts/restore b/scripts/restore
index 342c673..8be991c 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -59,8 +59,13 @@ ynh_system_user_create --username=$app --home_dir="$final_path"
 #=================================================
 ynh_script_progression --message="Restoring $app main directory..." --weight=4
 
+# Frontend
 ynh_restore_file --origin_path="$final_path"
 
+# Backend
+ynh_restore_file --origin_path="/opt/vikunja"
+
+chmod +x "/opt/vikunja/vikunja"
 chmod 750 "$final_path"
 chmod -R o-rwx "$final_path"
 chown -R $app:www-data "$final_path"
diff --git a/scripts/upgrade b/scripts/upgrade
index 508fe1c..802fbab 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -102,12 +102,18 @@ then
 	ynh_script_progression --message="Upgrading source files..." --weight=5
 
 	# Download, check integrity, uncompress and patch the source from app.src
+	# Frontend
 	ynh_setup_source --dest_dir="$final_path" --source_id="front" --keep="/etc/vikunja/config.yml"
-	ynh_setup_source --dest_dir="$final_path" --source_id="$architecture"
+	
+	# Backend
 	mkdir -p "/opt/vikunja/files"
-
+	tempdir="$(mktemp -d)"
+	ynh_setup_source --dest_dir=$tempdir --source_id="$architecture"
+	back="$(find $tempdir -name "vikunja-*" \! -name "*.sha256")"
+	cp "$back" "/opt/vikunja/vikunja"
 fi
 
+chmod +x "/opt/vikunja/vikunja"
 chmod 750 "$final_path"
 chmod -R o-rwx "$final_path"
 chown -R $app:www-data "$final_path"