diff --git a/controllers/releases.php b/controllers/releases.php
index 72dc7d01d806248ace6404af4c99c8bf68f730c4..305a659a45357c2af62e8372ff1b584e3538ab3a 100644
--- a/controllers/releases.php
+++ b/controllers/releases.php
@@ -152,6 +152,13 @@ final class ReleasesController extends \TracToGitlab\Controller
 
     private function getFileSize(string $url): int
     {
+        // Hardocded sizes for files from sourceforge since they have an ugly
+        // redirect that makes the page load very slowly
+        $hardcoded_size = $this->getHardcodedSize($url);
+        if ($hardcoded_size) {
+            return $hardcoded_size;
+        }
+
         // Init curl if necessary
         if (self::$curl_handle === null) {
             self::$curl_handle = curl_init(null);
@@ -228,4 +235,24 @@ final class ReleasesController extends \TracToGitlab\Controller
         $user = User::findCurrent();
         return $user && $user->perms === 'root';
     }
+
+    private function getHardcodedSize(string $url): ?int
+    {
+        $sizes = [
+            'https://sourceforge.net/projects/studip/files/Stud.IP/5.1/studip-5.1.1.tar.gz/download' => 47931884,
+            'https://sourceforge.net/projects/studip/files/Stud.IP/5.1/studip-5.1.1.zip/download'    => 69768212,
+            'https://sourceforge.net/projects/studip/files/Stud.IP/5.1/studip-5.1.tar.gz/download'   => 47423999,
+            'https://sourceforge.net/projects/studip/files/Stud.IP/5.1/studip-5.1.zip/download'      => 69706312,
+            'https://sourceforge.net/projects/studip/files/Stud.IP/5.0/studip-5.0.3.tar.gz/download' => 46303014,
+            'https://sourceforge.net/projects/studip/files/Stud.IP/5.0/studip-5.0.3.zip/download'    => 68927080,
+            'https://sourceforge.net/projects/studip/files/Stud.IP/5.0/studip-5.0.2.tar.gz/download' => 47723117,
+            'https://sourceforge.net/projects/studip/files/Stud.IP/5.0/studip-5.0.2.zip/download'    => 70078254,
+            'https://sourceforge.net/projects/studip/files/Stud.IP/5.0/studip-5.0.1.tar.gz/download' => 46729928,
+            'https://sourceforge.net/projects/studip/files/Stud.IP/5.0/studip-5.0.1.zip/download'    => 68693041,
+            'https://sourceforge.net/projects/studip/files/Stud.IP/5.0/studip-5.0.tar.gz/download'   => 52728907,
+            'https://sourceforge.net/projects/studip/files/Stud.IP/5.0/studip-5.0.zip/download'      => 68481771,
+        ];
+
+        return $sizes[$url] ?? null;
+    }
 }