diff --git a/README.md b/README.md
index 6afb824..4631eb7 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@ An open source, modern and powerful wiki app built on Node.js, Git and Markdown
 
 **Wiki.js is still under development, all features not already implemented.**
 
-**Shipped version:** 2.0.0-beta.11
+**Shipped version:** 2.0.0-beta.17
 
 ## Licence
 
diff --git a/manifest.json b/manifest.json
index 1aa8d07..ca8cffa 100644
--- a/manifest.json
+++ b/manifest.json
@@ -6,7 +6,7 @@
         "en": "An open source, modern and powerful wiki app built on Node.js, Git and Markdown for YunoHost.",
         "fr": "Un wiki moderne et open source propulsé Node.js, Git et Markdown pour YunoHost."
     },
-    "version": "2.0.0-beta.11~ynh1",
+    "version": "2.0.0-beta.17~ynh1",
     "url": "https://wiki.js.org/",
     "license": "AGPL-3.0-or-later",
     "maintainer": {
diff --git a/scripts/install b/scripts/install
index 7283b44..01b5246 100644
--- a/scripts/install
+++ b/scripts/install
@@ -133,6 +133,10 @@ ynh_app_setting_set $app final_path $final_path
 #ynh_setup_source "$final_path"
 git clone https://github.com/Requarks/wiki "$final_path"
 
+pushd $final_path
+	git checkout 2.0.0-beta.17
+popd
+
 #=================================================
 # NGINX CONFIGURATION
 #=================================================
@@ -184,11 +188,11 @@ chown -R "$app":"$app" "$final_path"
 
 pushd $final_path
     ynh_use_nodejs
-    sudo -u $app env PATH=$PATH:$nodejs_path npm install "graphql@^0.13.1"
-    sudo -u $app env PATH=$PATH:$nodejs_path npm install "acorn@^6.0.0"
-    sudo -u $app env PATH=$PATH:$nodejs_path npm install "babel-core@>=6.0.20"
-    sudo -u $app env PATH=$PATH:$nodejs_path npm install "eslint@>=5.0.0"
-    sudo -u $app env PATH=$PATH:$nodejs_path npm install
+    #sudo -u $app env PATH=$PATH:$nodejs_path npm install "graphql@^0.13.1" --save --production
+    #sudo -u $app env PATH=$PATH:$nodejs_path npm install "acorn@^6.0.0" --save --production
+    #sudo -u $app env PATH=$PATH:$nodejs_path npm install "babel-core@>=6.0.20" --save --production
+    #sudo -u $app env PATH=$PATH:$nodejs_path npm install "eslint@>=5.0.0" --save --production
+    sudo -u $app env PATH=$PATH:$nodejs_path npm install --production
     sudo -u $app env PATH=$PATH:$nodejs_path npm audit fix
     sudo -u $app env PATH=$PATH:$nodejs_path npm run build
 popd
diff --git a/scripts/upgrade b/scripts/upgrade
index ede61ab..8bb9440 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -85,7 +85,11 @@ path_url=$(ynh_normalize_url_path $path_url)
 
 # Download, check integrity, uncompress and patch the source from app.src
 #ynh_setup_source "$final_path"
-( cd $final_path && git pull )
+
+pushd $final_path
+	git pull
+	git checkout 2.0.0-beta.17
+popd
 
 #=================================================
 # NGINX CONFIGURATION
@@ -125,12 +129,27 @@ chown -R "$app":"$app" "$final_path"
 
 pushd $final_path
     ynh_use_nodejs
-    sudo -u $app env PATH=$PATH:$nodejs_path npm update
-    sudo -u $app env PATH=$PATH:$nodejs_path npm install
+    sudo -u $app env PATH=$PATH:$nodejs_path npm update --production
+    sudo -u $app env PATH=$PATH:$nodejs_path npm install --production
     sudo -u $app env PATH=$PATH:$nodejs_path npm audit fix
     sudo -u $app env PATH=$PATH:$nodejs_path npm run build
 popd
 
+
+#=================================================
+# MODIFY A CONFIG FILE
+#=================================================
+
+cp -f ../conf/config.sample.yml "$final_path/config.yml"
+
+### `ynh_replace_string` is used to replace a string in a file.
+### (It's compatible with sed regular expressions syntax)
+
+#ynh_replace_string "match_string" "replace_string" "$final_path/config.yml"
+ynh_replace_string "__PORT__" "$port" "$final_path/config.yml"
+ynh_replace_string "__DB_PWD__" "$db_pwd" "$final_path/config.yml"
+ynh_replace_string "__DB_NAME__" "$db_name" "$final_path/config.yml"
+
 ### 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.
 ynh_backup_if_checksum_is_different "$final_path/config.yml"