diff --git a/src/drivers/npm/README.md b/src/drivers/npm/README.md
index bb68ae800..aca74a996 100644
--- a/src/drivers/npm/README.md
+++ b/src/drivers/npm/README.md
@@ -18,6 +18,12 @@ $ npm i -g wappalyzer      # Globally
 $ npm i wappalyzer --save  # As a dependency
 ```
 
+To use Puppeteer (headless Chrome browser), you must install the NPM package manually:
+
+```shell
+$ npm i puppeteer@^2.0.0
+```
+
 
 ## Run from the command line
 
diff --git a/src/drivers/npm/npm-shrinkwrap.json b/src/drivers/npm/npm-shrinkwrap.json
index c94f8e7c4..ef47e40cd 100644
--- a/src/drivers/npm/npm-shrinkwrap.json
+++ b/src/drivers/npm/npm-shrinkwrap.json
@@ -1,6 +1,6 @@
 {
   "name": "wappalyzer",
-  "version": "5.9.0",
+  "version": "5.9.1",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/src/drivers/npm/package.json b/src/drivers/npm/package.json
index 8debdaa10..c3b388a75 100644
--- a/src/drivers/npm/package.json
+++ b/src/drivers/npm/package.json
@@ -2,7 +2,7 @@
   "name": "wappalyzer",
   "description": "Uncovers the technologies used on websites",
   "homepage": "https://github.com/AliasIO/Wappalyzer",
-  "version": "5.9.0",
+  "version": "5.9.1",
   "author": "Elbert Alias",
   "license": "GPL-3.0",
   "repository": {
diff --git a/src/drivers/webextension/manifest.json b/src/drivers/webextension/manifest.json
index b5a529987..5aaee78e3 100644
--- a/src/drivers/webextension/manifest.json
+++ b/src/drivers/webextension/manifest.json
@@ -4,7 +4,7 @@
   "author": "Elbert Alias",
   "homepage_url": "https://www.wappalyzer.com",
   "description": "Identify web technologies",
-  "version": "5.9.0",
+  "version": "5.9.1",
   "default_locale": "en",
   "manifest_version": 2,
   "icons": {