diff --git a/scripts/restore b/scripts/restore
index b8136da..bc93a3b 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -79,9 +79,7 @@ ynh_script_progression --message="Reinstalling dependencies..." --weight=7
 # Define and install dependencies
 ynh_exec_warn_less ynh_install_app_dependencies $pkg_dependencies
 
-tempdir="$(mktemp -d)"
-ynh_setup_source --dest_dir=$tempdir --source_id=crystal
-ynh_exec_warn_less dpkg -i $tempdir/crystal_1.0.0-1_amd64.deb
+curl -fsSL https://crystal-lang.org/install.sh | bash -s -- --channel=nightly
 
 #=================================================
 # RESTORE THE POSTGRESQL DATABASE
diff --git a/scripts/upgrade b/scripts/upgrade
index 5f1df24..a0eeb1c 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -122,9 +122,7 @@ ynh_script_progression --message="Upgrading dependencies..." --weight=8
 
 ynh_exec_warn_less ynh_install_app_dependencies $pkg_dependencies
 
-tempdir="$(mktemp -d)"
-ynh_setup_source --dest_dir=$tempdir --source_id=crystal
-ynh_exec_warn_less dpkg -i $tempdir/crystal_1.0.0-1_amd64.deb
+curl -fsSL https://crystal-lang.org/install.sh | bash -s -- --channel=nightly
 
 #=================================================
 # MODIFY A CONFIG FILE