diff --git a/backend-php/dynamic.js.php b/backend-php/dynamic.js.php
index 57d0c07..325bead 100644
--- a/backend-php/dynamic.js.php
+++ b/backend-php/dynamic.js.php
@@ -4,7 +4,7 @@
 // entries needed for clientside processing.
 
 include("./include/inc.php");
-header("Content-Type: text/javascript");
+header("Content-Type: text/javascript; charset=utf-8");
 
 ?>
 var TILE_URI = <?php echo json_encode(getConfig("map_tile_uri")); ?>;
diff --git a/frontend/index.html b/frontend/index.html
index b8f0af9..3861d4f 100644
--- a/frontend/index.html
+++ b/frontend/index.html
@@ -1,6 +1,7 @@
 <!DOCTYPE html>
 <html>
     <head>
+        <meta charset="UTF-8">
         <!-- Load Leaflet for the map. -->
         <link rel="stylesheet" href="https://unpkg.com/leaflet@1.5.1/dist/leaflet.css"
             integrity="sha512-xwE/Az9zrjBIphAcBb3F6JVqxf46+CDLwfLMHloNu6KEQCAWi6HcDUbeOfBIptF7tcCzusKFjFw2yuvEpDL9wQ=="
@@ -91,6 +92,6 @@
             </div>
         </div>
 
-        <script src="./main.js"></script>
+        <script src="./main.js" charset="UTF-8"></script>
     </body>
 </html>
diff --git a/frontend/style.css b/frontend/style.css
index 28ee15a..5aad2e2 100644
--- a/frontend/style.css
+++ b/frontend/style.css
@@ -1,3 +1,4 @@
+@charset "UTF-8";
 /* The main stylesheet for the Hauk web view interface. */
 
 * {
