diff --git a/README.md b/README.md
index db998bd..b05fb9d 100644
--- a/README.md
+++ b/README.md
@@ -73,7 +73,7 @@ The `tabs` field is an array of objects with the following fields:
 | `customCss`         | Array of Strings (Optional) | Custom CSS URLs (see [Custom JS/CSS](#custom-jscss))                   |
 | `basicAuthUser`     | String (Optional)           | User name credential for requests that use basic access authentication |
 | `basicAuthPassword` | String (Optional)           | Password credential for requests that use basic access authentication  |
-| `userAgent`         | String (Optional)           | Override the user agent header (Defaults to a recent Safari value)     |
+| `userAgent`         | String (Optional)           | Override the default WebKit user agent header                          |
 
 Here's the bare minimum example used in the Slack demo video above:
 
diff --git a/Sources/Runtime/Config.swift b/Sources/Runtime/Config.swift
index 2f48508..cec7609 100644
--- a/Sources/Runtime/Config.swift
+++ b/Sources/Runtime/Config.swift
@@ -43,7 +43,7 @@ struct Config {
             customJs: tab.customJs ?? [],
             basicAuthUser: tab.basicAuthUser ?? "",
             basicAuthPassword: tab.basicAuthPassword ?? "",
-            userAgent: tab.userAgent ?? "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.0 Safari/605.1.15"
+            userAgent: tab.userAgent
         )}
     }()
 
diff --git a/Sources/Runtime/Tab.swift b/Sources/Runtime/Tab.swift
index 00a05e7..dfc99e2 100644
--- a/Sources/Runtime/Tab.swift
+++ b/Sources/Runtime/Tab.swift
@@ -13,7 +13,7 @@ class Tab: NSObject {
     // Also: https://stackoverflow.com/a/64012633
     var badgeCount: Int = 0
 
-    init(title: String, url: URL, customCss: [URL], customJs: [URL], basicAuthUser: String, basicAuthPassword: String, userAgent: String) {
+    init(title: String, url: URL, customCss: [URL], customJs: [URL], basicAuthUser: String, basicAuthPassword: String, userAgent: String?) {
         let configuration = WKWebViewConfiguration()
         Browser.global.customCss(configuration, urls: customCss)
         Browser.global.customJs(configuration, urls: customJs)