diff --git a/scripts/install b/scripts/install
index d05379d..8ed920a 100644
--- a/scripts/install
+++ b/scripts/install
@@ -170,6 +170,7 @@ ynh_system_user_create $app
 
 ynh_install_nodejs 11
 ynh_use_nodejs
+npm install -g typescript
 npm install -g ts-node
 
 #=================================================
diff --git a/scripts/remove b/scripts/remove
index f51ec68..72c9e29 100644
--- a/scripts/remove
+++ b/scripts/remove
@@ -101,6 +101,7 @@ fi
 
 ynh_use_nodejs
 npm uninstall -g ts-node
+npm uninstall -g typescript
 ynh_remove_nodejs
 
 # Remove a cron file
diff --git a/scripts/restore b/scripts/restore
index 78622e9..b0ff196 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -93,6 +93,7 @@ chown -R root: $final_path
 
 ynh_install_nodejs 11
 ynh_use_nodejs
+npm install -g typescript
 npm install -g ts-node
 
 #=================================================
diff --git a/scripts/upgrade b/scripts/upgrade
index aebc75f..d8e6a57 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -112,6 +112,7 @@ ynh_system_user_create $app
 
 ynh_install_nodejs 11
 ynh_use_nodejs
+npm install -g typescript
 npm install -g ts-node
 
 ### Verify the checksum of a file, stored by `ynh_store_file_checksum` in the install script.