diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index f3da48e5eb4be744c6630e93fbf5b1fe8dfc452d..bc009b2ae0f9573b421c92495d584758766f8465 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,4 +1,4 @@
-image: texlive/texlive
+image: texlive/texlive:latest
 
 LuaLaTeX:
     script: 
@@ -7,6 +7,11 @@ LuaLaTeX:
         - latexmk -pdflua ctufit-thesis.tex
         - latexmk -pdflua ctufit-thesis-en.tex
         - latexmk -pdflua ctufit-thesis-sk.tex
+    artifacts:
+        paths:
+            - ctufit-thesis.pdf
+            - ctufit-thesis-en.pdf
+            - ctufit-thesis-sk.pdf
 
 XeLaTeX:
     script: 
@@ -15,6 +20,11 @@ XeLaTeX:
         - latexmk -pdfxe ctufit-thesis.tex
         - latexmk -pdfxe ctufit-thesis-en.tex
         - latexmk -pdfxe ctufit-thesis-sk.tex
+    artifacts:
+        paths:
+            - ctufit-thesis.pdf
+            - ctufit-thesis-en.pdf
+            - ctufit-thesis-sk.pdf
 
 pdfLaTeX:
     script: 
diff --git a/ctufit-thesis.cls b/ctufit-thesis.cls
index dc3578369f92984ab4d9b23b7712dc0135a71ed4..9a66e95a8676d196b37fc30529b5ff0fdd6dd067 100644
--- a/ctufit-thesis.cls
+++ b/ctufit-thesis.cls
@@ -446,7 +446,6 @@
   \thm@postskip\thm@preskip
 }
 \def\@endtheorem{\endtrivlist}%\@endpefalse
-\renewcommand\qedsymbol{\textcolor{decoration}{\ensuremath{\blacktriangleleft}}}
 \renewenvironment{proof}[1][\proofname]{\par
   \pushQED{\qed}%
   \normalfont \topsep6\p@\@plus6\p@\relax