diff --git a/ci/docker_install_php.sh b/ci/docker_install_php.sh
index 5065b055e9891df1d826ff1fc0f6dcc82c9f390a..c0f617edce99e4bd73e672f9ac1c77d30689f466 100755
--- a/ci/docker_install_php.sh
+++ b/ci/docker_install_php.sh
@@ -16,6 +16,6 @@ apt-get install -y libpq-dev libxml2-dev libxslt1-dev libpng-dev unoconv xpdf-ut
 && FIREFOX_URL="https://download.mozilla.org/?product=firefox-latest-ssl&os=linux64&lang=en-US" \
 && ACTUAL_URL=$(curl -Ls -o /dev/null -w %{url_effective} $FIREFOX_URL) \
 && curl --silent --show-error --location --fail --retry 3 --output /tmp/firefox.tar.bz2 $ACTUAL_URL \
-&& sudo tar -xvjf /tmp/firefox.tar.bz2 -C /opt \
-&& sudo ln -s /opt/firefox/firefox /usr/local/bin/firefox \
+&& tar -xvjf /tmp/firefox.tar.bz2 -C /opt \
+&& ln -s /opt/firefox/firefox /usr/local/bin/firefox \
 && firefox --version