diff --git a/wwwroot/favicon.ico b/wwwroot/favicon.ico
new file mode 100644
index 0000000..2848729
Binary files /dev/null and b/wwwroot/favicon.ico differ
diff --git a/wwwroot/index.html b/wwwroot/index.html
index 48c4ba0..5355489 100644
--- a/wwwroot/index.html
+++ b/wwwroot/index.html
@@ -11,8 +11,8 @@
         <meta name="description" content="This service can tell you your IP address in dn42.">
         <meta name="keywords" content="what is my ip,my ip">
                 
-        <link rel="icon" type="image/png" href="/favicon.png">
-        <link rel="shortcut icon" type="image/png" href="/favicon.png">
+        <link rel="icon" type="image/png" href="/favicon.ico">
+        <link rel="shortcut icon" type="image/png" href="/favicon.ico">
         
         <link rel="stylesheet" href="/assets/css/normalize.css" integrity="sha384-M86HUGbBFILBBZ9ykMAbT3nVb0+2C7yZlF8X2CiKNpDOQjKroMJqIeGZ/Le8N2Qp">
         <link rel="stylesheet" href="/assets/css/simple.min.css" integrity="sha384-ZLDMtZ+NjwNE3nk4wWLGpX4atVTD4fql9ruaAw2xFz7CLPlFcwrifgX2HgkdX6X7">
diff --git a/wwwroot/index.php b/wwwroot/index.php
index be20fca..fd70038 100644
--- a/wwwroot/index.php
+++ b/wwwroot/index.php
@@ -13,8 +13,8 @@
         <meta name="description" content="This service can tell you your IP address in dn42.">
         <meta name="keywords" content="what is my ip,my ip">
                 
-        <link rel="icon" type="image/png" href="/favicon.png">
-        <link rel="shortcut icon" type="image/png" href="/favicon.png">
+        <link rel="icon" type="image/png" href="/favicon.ico">
+        <link rel="shortcut icon" type="image/png" href="/favicon.ico">
         
         <link rel="stylesheet" href="/assets/css/normalize.css" integrity="sha384-M86HUGbBFILBBZ9ykMAbT3nVb0+2C7yZlF8X2CiKNpDOQjKroMJqIeGZ/Le8N2Qp">
         <link rel="stylesheet" href="/assets/css/simple.min.css" integrity="sha384-ZLDMtZ+NjwNE3nk4wWLGpX4atVTD4fql9ruaAw2xFz7CLPlFcwrifgX2HgkdX6X7">