diff --git a/Dockerfile b/Dockerfile
index f8f6b9d8..c368f6e0 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -33,6 +33,8 @@ RUN set -e -x \
   openssl-dev \
   perl-dev \
   perl-utils \
+  perl-net-ssleay \
+  perl-io-socket-ssl \
   php81-pdo \
   php81-pdo_mysql \
   php81-pdo_pgsql \
@@ -43,7 +45,7 @@ RUN set -e -x \
   && unzip parser.zip && cp -av dmarcts-report-parser-master/* /usr/bin/ && rm -vf parser.zip && rm -rvf dmarcts-report-parser-master \
   && unzip viewer.zip && cp -av dmarcts-report-viewer-master/* /var/www/viewer/ && rm -vf viewer.zip && rm -rvf dmarcts-report-viewer-master \
   && sed -i "1s/^/body { font-family: Sans-Serif; }\n/" /var/www/viewer/default.css \
-  && sed -i 's%.*listen [::]:8080 default_server;%        listen [::]:80 default_server;%g' /etc/nginx/nginx.conf \
+  && sed -i 's%^\s*listen \[::\]:8080 default_server;%        listen [::]:80 default_server;%g' /etc/nginx/nginx.conf \
   && sed -i 's%.*listen 8080 default_server;%        listen 80 default_server;%g' /etc/nginx/nginx.conf \
   && sed -i 's%.*root /var/www/html;%        root /var/www/viewer;%g' /etc/nginx/nginx.conf \
   && sed -i 's/.*index index.php index.html;/        index dmarcts-report-viewer.php;/g' /etc/nginx/nginx.conf \
@@ -74,7 +76,7 @@ RUN set -e -x \
   Socket6 \
   PerlIO::gzip \
   ; do cpan install $i; done \
-  && apk del mariadb-dev expat-dev openssl-dev perl-dev g++ cmake make musl-obstack-dev libpq-dev
+  && apk del mariadb-dev openssl-dev perl-dev g++ cmake make musl-obstack-dev libpq-dev
 
 HEALTHCHECK --interval=1m --timeout=3s CMD curl --silent --fail http://127.0.0.1:80/fpm-ping
 
diff --git a/examples/env.example b/examples/env.example
index e014b8f0..4df73850 100644
--- a/examples/env.example
+++ b/examples/env.example
@@ -51,3 +51,6 @@ PARSER_IMAP_IGNORE_ERROR=0
 # When the size exceeds the maximum, one could experience an error Uncaught ValueError: DOMDocument::loadXML():
 # Argument #1 ($source) must not be empty.
 PARSER_XML_MAXSIZE=50000
+
+# Disable nginx ipv6 functionality. Set to 1 to activate
+NO_NGINX_IPV6=0
diff --git a/manifest/entrypoint.sh b/manifest/entrypoint.sh
index 32569614..5af44465 100755
--- a/manifest/entrypoint.sh
+++ b/manifest/entrypoint.sh
@@ -40,5 +40,11 @@ else
   exit 1
 fi
 
+if [[ -v NO_NGINX_IPV6 ]]; then
+    nginx -s stop
+    sed -i 's/^\([[:space:]]*\)listen \[::\]:80 default_server;/\1#listen [::]:80 default_server;/g' /etc/nginx/nginx.conf
+    nginx
+fi
+
 # Start supervisord and services
 /usr/bin/supervisord -n -c /etc/supervisord.conf