diff --git a/scripts/install b/scripts/install
index d3d39f0..219826c 100644
--- a/scripts/install
+++ b/scripts/install
@@ -100,8 +100,6 @@ ynh_print_info "Add OnlyOffice repository..."
 apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys CB2DE8E5
 echo "deb http://download.onlyoffice.com/repo/debian squeeze main" | sudo tee /etc/apt/sources.list.d/onlyoffice.list
 
-ynh_package_update
-
 #=================================================
 # INSTALL DEPENDENCIES
 #=================================================
@@ -191,7 +189,7 @@ echo onlyoffice-documentserver onlyoffice/ds-port select ${port} | sudo debconf-
 ynh_print_info "Install OnlyOffice..."
 
 wget $source
-dpkg -i onlyoffice-documentserver_amd64.deb
+apt install ./onlyoffice-documentserver_amd64.deb
 
 #=================================================
 # MODIFY A CONFIG FILE
diff --git a/scripts/restore b/scripts/restore
index 0b13ac4..6b4a36b 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -132,7 +132,7 @@ echo onlyoffice-documentserver onlyoffice/ds-port select ${port} | sudo debconf-
 ynh_print_info "Reinstalling OnlyOffice..."
 
 wget $source
-dpkg -i onlyoffice-documentserver_amd64.deb
+apt install ./onlyoffice-documentserver_amd64.deb
 
 #=================================================
 # GENERIC FINALIZATION
diff --git a/scripts/upgrade b/scripts/upgrade
index 0fb2214..ac82c80 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -128,7 +128,7 @@ echo "deb http://download.onlyoffice.com/repo/debian squeeze main" | sudo tee /e
 ynh_print_info "Upgrading OnlyOffice..."
 
 wget $source
-dpkg -i onlyoffice-documentserver_amd64.deb
+apt install ./onlyoffice-documentserver_amd64.deb
 
 ### Verify the checksum of a file, stored by `ynh_store_file_checksum` in the install script.
 ### And create a backup of this file if the checksum is different. So the file will be backed up if the admin had modified it.