diff --git a/docker/Dockerfile b/docker/Dockerfile
index f75e34b..2e68c87 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -23,7 +23,7 @@ RUN ./install-composer.sh
 # Install Node.js and required packages
 RUN curl -sL https://deb.nodesource.com/setup_14.x | bash -
 RUN apt install -y nodejs
-RUN npm install -g uglify-js clean-css-cli html-minifier
+RUN npm install -g uglify-js clean-css-cli svgo
 
 EXPOSE 80
 VOLUME /var/www/mapguesser
diff --git a/public/static/img/loading.svg b/public/static/img/loading.svg
index 06e021e..fbf1cfa 100644
--- a/public/static/img/loading.svg
+++ b/public/static/img/loading.svg
@@ -1,11 +1,23 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<svg xmlns:svg="http://www.w3.org/2000/svg" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.0" width="64px" height="64px" viewBox="0 0 128 128" xml:space="preserve">
+<svg viewBox="0 0 50 50" xmlns="http://www.w3.org/2000/svg">
     <g>
         <linearGradient id="linear-gradient">
-            <stop offset="0%" stop-color="#ffffff" fill-opacity="0"/>
-            <stop offset="100%" stop-color="#000000" fill-opacity="1"/>
+            <stop offset="0%" stop-color="#ffffff" />
+            <stop offset="100%" stop-color="#000000" />
         </linearGradient>
-        <path d="M63.85 0A63.85 63.85 0 1 1 0 63.85 63.85 63.85 0 0 1 63.85 0zm.65 19.5a44 44 0 1 1-44 44 44 44 0 0 1 44-44z" fill="url(#linear-gradient)" fill-rule="evenodd"/>
-        <animateTransform attributeName="transform" type="rotate" from="0 64 64" to="360 64 64" dur="1080ms" repeatCount="indefinite"></animateTransform>
+        <circle
+                fill="none"
+                fill-rule="evenodd"
+                stroke="url(#linear-gradient)"
+                stroke-width="6"
+                cx="25"
+                cy="25"
+                r="22" />
+        <animateTransform
+                attributeName="transform"
+                type="rotate"
+                from="0 25 25"
+                to="360 25 25"
+                dur="1.25"
+                repeatCount="indefinite" />
     </g>
 </svg>
diff --git a/scripts/minify.sh b/scripts/minify.sh
index 79c1bb5..24b9398 100755
--- a/scripts/minify.sh
+++ b/scripts/minify.sh
@@ -6,4 +6,4 @@ ROOT_DIR=$(dirname $(readlink -f "$0"))/..
 
 uglifyjs ${ROOT_DIR}/public/static/js/mapguesser.js -c -m -o ${ROOT_DIR}/public/static/js/mapguesser.js
 cleancss ${ROOT_DIR}/public/static/css/mapguesser.css -o ${ROOT_DIR}/public/static/css/mapguesser.css
-html-minifier ${ROOT_DIR}/public/static/img/loading.svg --collapse-whitespace --remove-comments -o ${ROOT_DIR}/public/static/img/loading.svg
+svgo ${ROOT_DIR}/public/static/img/loading.svg -o ${ROOT_DIR}/public/static/img/loading.svg
diff --git a/src/Database/Mysql/ResultSet.php b/src/Database/Mysql/ResultSet.php
index caf127c..adb7288 100644
--- a/src/Database/Mysql/ResultSet.php
+++ b/src/Database/Mysql/ResultSet.php
@@ -12,17 +12,17 @@ class ResultSet implements IResultSet
         $this->result = $result;
     }
 
-    public function fetch(int $type = IResultSet::FETCH_ASSOC)
+    public function fetch(int $type = IResultSet::FETCH_ASSOC): ?array
     {
         return $this->result->fetch_array($this->convertFetchType($type));
     }
 
-    public function fetchAll(int $type = IResultSet::FETCH_ASSOC)
+    public function fetchAll(int $type = IResultSet::FETCH_ASSOC): array
     {
         return $this->result->fetch_all($this->convertFetchType($type));
     }
 
-    public function fetchOneColumn(string $valueName, string $keyName = null)
+    public function fetchOneColumn(string $valueName, string $keyName = null): array
     {
         $array = [];
 
diff --git a/src/Database/Query/Select.php b/src/Database/Query/Select.php
index 4d32f9b..a379728 100644
--- a/src/Database/Query/Select.php
+++ b/src/Database/Query/Select.php
@@ -115,7 +115,7 @@ class Select
         return $this;
     }
 
-    public function orderBy($column, string $type = 'asc'): Select
+    public function orderBy($column, string $type = 'ASC'): Select
     {
         $this->orders[] = [$column, $type];
 
@@ -394,7 +394,7 @@ class Select
         $orders = $this->orders;
 
         array_walk($orders, function (&$value, $key) {
-            $value = $this->generateColumn($value[0]) . ' ' . $value[1];
+            $value = $this->generateColumn($value[0]) . ' ' . strtoupper($value[1]);
         });
 
         return implode(',', $orders);
diff --git a/src/Interfaces/Database/IResultSet.php b/src/Interfaces/Database/IResultSet.php
index 69d99f5..cf73cd0 100644
--- a/src/Interfaces/Database/IResultSet.php
+++ b/src/Interfaces/Database/IResultSet.php
@@ -8,9 +8,9 @@ interface IResultSet
 
     const FETCH_BOTH = 2;
 
-    public function fetch(int $type);
+    public function fetch(int $type): ?array;
 
-    public function fetchAll(int $type);
+    public function fetchAll(int $type): array;
 
-    public function fetchOneColumn(string $valueName, string $keyName);
+    public function fetchOneColumn(string $valueName, string $keyName): array;
 }