diff --git a/adminer/include/functions.inc.php b/adminer/include/functions.inc.php
index e528abe1..b1e03891 100644
--- a/adminer/include/functions.inc.php
+++ b/adminer/include/functions.inc.php
@@ -1137,7 +1137,7 @@ function select_value($val, $link, $field, $text_length) {
 		if ($protocol = is_url($val)) {
 			$link = (($protocol == "http" && $HTTPS) || preg_match('~WebKit~i', $_SERVER["HTTP_USER_AGENT"]) // WebKit supports noreferrer since 2009
 				? $val // HTTP links from HTTPS pages don't receive Referer automatically
-				: "$protocol://www.adminer.org/redirect/?url=" . urlencode($val) // intermediate page to hide Referer
+				: "https://www.adminer.org/redirect/?url=" . urlencode($val) // intermediate page to hide Referer
 			);
 		}
 	}
diff --git a/adminer/static/functions.js b/adminer/static/functions.js
index 2cce663a..f7c048d1 100644
--- a/adminer/static/functions.js
+++ b/adminer/static/functions.js
@@ -37,7 +37,7 @@ function cookie(assign, days) {
 function verifyVersion(current) {
 	cookie('adminer_version=0', 1);
 	var iframe = document.createElement('iframe');
-	iframe.src = location.protocol + '//www.adminer.org/version/?current=' + current;
+	iframe.src = 'https://www.adminer.org/version/?current=' + current;
 	iframe.frameBorder = 0;
 	iframe.marginHeight = 0;
 	iframe.scrolling = 'no';
@@ -46,7 +46,7 @@ function verifyVersion(current) {
 	if (window.postMessage && window.addEventListener) {
 		iframe.style.display = 'none';
 		addEventListener('message', function (event) {
-			if (event.origin == location.protocol + '//www.adminer.org') {
+			if (event.origin == 'https://www.adminer.org') {
 				var match = /version=(.+)/.exec(event.data);
 				if (match) {
 					cookie('adminer_version=' + match[1], 1);