diff --git a/Dockerfile b/Dockerfile
index 58a520f126c69a1671c164c0055f1e518ccad8cf..81e33fcc4132a25ffd38efc02fc87cdca772ba67 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,6 @@
 FROM texlive/texlive
 RUN export DEBIAN_FRONTEND=noninteractive && apt-get update && apt-get -y upgrade && apt-get -y install plantuml openjdk-11-jdk-headless hunspell hunspell-hu hunspell-en-gb hunspell-en-us python3-pip && pip3 install javalang
-COPY tikz-uml.sty /usr/local/texlive/2020/texmf-dist/tex/latex/tikz-uml/tikz-uml.sty
+COPY tikz-uml.sty /usr/local/texlive/2021/texmf-dist/tex/latex/tikz-uml/tikz-uml.sty
 RUN mktexlsr
 COPY gen_seq_diag.py /
 COPY jsonDoclet.jar /root/jsonDoclet.jar