diff --git a/scripts/_common.sh b/scripts/_common.sh
index f983ca9..22b933d 100755
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -10,6 +10,8 @@ install_sources() {
     fi
 
     mkdir -p $final_path
+    chown $synapse_user:root -R $final_path
+    chown $synapse_user:root -R $data_path
 
     if [ -n "$(uname -m | grep arm)" ]
     then
@@ -28,6 +30,19 @@ install_sources() {
             fi
         done
     else
+        # Install rustup is not already installed
+        # We need this to be able to install cryptgraphy
+        export PATH="$PATH:$final_path/.cargo/bin:$final_path/.local/bin:/usr/local/sbin"
+        if [ -e $final_path/.rustup ]; then
+            sudo -u "$synapse_user" env PATH=$PATH rustup update
+        else
+            sudo -u "$synapse_user" bash -c 'curl -sSf -L https://static.rust-lang.org/rustup.sh | sh -s -- -y --default-toolchain=stable'
+            mv $data_path/.cargo $final_path/
+            mv $data_path/.rustup $final_path/
+            ln -s $final_path/.cargo $data_path/.cargo
+            ln -s $final_path/.rustup $data_path/.rustup
+        fi
+    
         # Install virtualenv if it don't exist
         test -e $final_path/bin/python3 || python3 -m venv $final_path
 
@@ -39,8 +54,10 @@ install_sources() {
         source $final_path/bin/activate
         set -u;
         pip3 install --upgrade setuptools wheel
+        chown $synapse_user:root -R $final_path
+        sudo -u $synapse_user env PATH=$PATH pip3 install --upgrade 'cryptography>=3.3'
         pip3 install --upgrade cffi ndg-httpsclient psycopg2 lxml jinja2
-        pip3 install --upgrade 'Twisted>=20.3.0' 'cryptography>=3.3' matrix-synapse==$upstream_version matrix-synapse-ldap3
+        pip3 install --upgrade 'Twisted>=20.3.0' matrix-synapse==$upstream_version matrix-synapse-ldap3
 
         # This function was defined when we called "source $final_path/bin/activate". With this function we undo what "$final_path/bin/activate" does
         set +u;
diff --git a/scripts/restore b/scripts/restore
index 9b27ca4..46bcb99 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -72,6 +72,16 @@ ynh_script_progression --message="Reinstalling dependencies..." --weight=70
 # For any update do it in all files
 ynh_install_app_dependencies $dependances
 
+#=================================================
+# RECREATE THE DEDICATED USER
+#=================================================
+ynh_script_progression --message="Recreating the dedicated system user..." --weight=3
+
+# Create the dedicated user (if not existing)
+ynh_system_user_create --username=$synapse_user --home_dir=$data_path
+adduser $synapse_user ssl-cert
+adduser turnserver ssl-cert
+
 #=================================================
 # RESTORE ALL CONFIG AND DATA
 #=================================================
@@ -92,18 +102,6 @@ install_sources
 ynh_script_progression --message="Reload fail2ban..." --weight=6
 ynh_systemd_action --action=restart --service_name=fail2ban
 
-#=================================================
-# SPECIFIC RESTORATION
-#=================================================
-# RECREATE THE DEDICATED USER
-#=================================================
-ynh_script_progression --message="Recreating the dedicated system user..." --weight=3
-
-# Create the dedicated user (if not existing)
-ynh_system_user_create --username=$synapse_user --home_dir=$data_path
-adduser $synapse_user ssl-cert
-adduser turnserver ssl-cert
-
 #=================================================
 # RESTORE THE POSTGRESQL DATABASE
 #=================================================