diff --git a/pica-dokuwiki/Dockerfile b/pica-dokuwiki/Dockerfile
index dc7989b28910f600335709ca639052d3d15e0989..d8e10dd718c5b1bd3f7c89ffeab741d35010c880 100644
--- a/pica-dokuwiki/Dockerfile
+++ b/pica-dokuwiki/Dockerfile
@@ -12,9 +12,7 @@ RUN apt-get update -y && \
         php7.0 \
         php7.0-fpm \
         php7.0-gd \
-        php7.0-xml \
-	    libidn2-0 && \
-    apt-get remove -y libidn11 && \
+        php7.0-xml && \
     mkdir -p html /var/run/php && \
     echo "cgi.fix_pathinfo = 0;" >> /etc/php/7.0/fpm/php.ini && \
     sed -i -e "s|;daemonize\s*=\s*yes|daemonize = no|g" /etc/php/7.0/fpm/php-fpm.conf && \
@@ -28,7 +26,7 @@ RUN apt-get update -y && \
     chown -R www-data . && \
     chmod +x /run.sh && \
     sed -i "s/\${MAXSIZE}/100M/g" /etc/nginx/nginx.conf
-    
+
 EXPOSE 80
 VOLUME ["/var/www/html"]
 HEALTHCHECK CMD wget -q -O /dev/null http://127.0.0.1:${DOKUWIKI_PORT:=80}/