diff --git a/it4i_theme/header.html b/it4i_theme/header.html
index e2291b4fd2d8ff70f864e5743e9319fc6eedf0bf..828a6e82f103039bc32dc27fca7b322447583c5c 100644
--- a/it4i_theme/header.html
+++ b/it4i_theme/header.html
@@ -23,7 +23,7 @@
       </div>
     </div>
       <div class="button button-github" role="button" aria-label="GitHub">
-        <a href="https://gitlab.it4i.cz/kru0052/docs.it4i" title="on GitLab" target="_blank" ><img border="0" src="img/git.png" width="30" height="30"></a>
+        <a href="https://gitlab.it4i.cz/kru0052/docs.it4i" title="on GitLab" target="_blank" ><img src="img/git.png" width="24" height="24"></a>
       </div>
     <div class="button button-search" role="button" aria-label="Search">
       <label class="toggle-button icon icon-search" title="Search" for="toggle-search"></label>