diff --git a/README.md b/README.md
index c0996378..d79c99a9 100755
--- a/README.md
+++ b/README.md
@@ -76,9 +76,9 @@ You can use as many operations as you like in simple or complex ways. Some examp
 
 CyberChef is built to support
 
- - Google Chrome 40+
- - Mozilla Firefox 35+
- - Microsoft Edge 14+
+ - Google Chrome 50+
+ - Mozilla Firefox 38+
+
 
 ## Node.js support
 
diff --git a/package.json b/package.json
index 66e4557e..b19dd8bc 100644
--- a/package.json
+++ b/package.json
@@ -31,10 +31,9 @@
   "module": "src/node/index.mjs",
   "bugs": "https://github.com/gchq/CyberChef/issues",
   "browserslist": [
-    "Chrome >= 40",
-    "Firefox >= 35",
-    "Edge >= 14",
-    "node >= 6.5"
+    "Chrome >= 50",
+    "Firefox >= 38",
+    "node >= 10"
   ],
   "devDependencies": {
     "@babel/core": "^7.5.0",
diff --git a/src/web/html/index.html b/src/web/html/index.html
index 419f726d..4063e138 100755
--- a/src/web/html/index.html
+++ b/src/web/html/index.html
@@ -123,9 +123,9 @@
                 document.getElementById("preloader-error").innerHTML =
                     "CyberChef encountered an error while loading.<br><br>" +
                     "The following browser versions are supported:" +
-                    "<ul><li>Google Chrome 40+</li><li>Mozilla Firefox 35+</li><li>Microsoft Edge 14+</li></ul>" +
+                    "<ul><li>Google Chrome 50+</li><li>Mozilla Firefox 38+</li></ul>" +
                     "Your user agent is:<br>" + escapeHtml(navigator.userAgent) + "<br><br>" +
-                    "If your browser is supported, please <a href='https://github.com/gchq/CyberChef/issues/new'>" +
+                    "If your browser is supported, please <a href='https://github.com/gchq/CyberChef/issues/new/choose'>" +
                     "raise an issue</a> including the following details:<br><br>" +
                     "<pre>" + escapeHtml(msg) + "</pre>";
             };