diff --git a/Dockerfile b/Dockerfile
index 38365e8ba877ddb135d60912f04337fb4592ef99..a28d4937313c79798b82c8c4d1779740dac84662 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -24,6 +24,7 @@ RUN apk add --update \
     php7-json \
     php7-pcntl \
     php7-opcache \
+    php7-fileinfo \
     && rm -rf /var/cache/apk/*
 
 WORKDIR /html
@@ -37,6 +38,7 @@ RUN sed -i 's/user = nobody/user = nginx/g' /etc/php7/php-fpm.d/www.conf && \
     sed -i 's/user = www-data/user = nginx/g' /etc/php7/php-fpm.d/www.conf && \
     sed -i 's/group = www-data/group = nginx/g' /etc/php7/php-fpm.d/www.conf && \
     sed -i 's/;cgi.fix_pathinfo=1/cgi.fix_pathinfo=0/g' /etc/php7/php.ini && \
+    sed -i 's/expose_php = On/expose_php = Off/g' /etc/php7/php.ini && \
     # Opcache configuration
     sed -i 's/;opcache.enable=1/opcache.enable=1/g' /etc/php7/php.ini && \
     sed -i 's/;opcache.memory_consumption=128/opcache.memory_consumption=128/g' /etc/php7/php.ini && \
diff --git a/Dockerfile.dev b/Dockerfile.dev
index 131aa02954b959a596888764cb200a685bc1d332..3f07e86517d4cc97d83851791c80f17bdc8e7273 100644
--- a/Dockerfile.dev
+++ b/Dockerfile.dev
@@ -23,7 +23,7 @@ RUN apk add --update \
     php7-gd \
     php7-json \
     php7-pcntl \
-    php7-opcache \
+    php7-fileinfo \
     && rm -rf /var/cache/apk/*
 
 WORKDIR /html
@@ -37,14 +37,7 @@ RUN sed -i 's/user = nobody/user = nginx/g' /etc/php7/php-fpm.d/www.conf && \
     sed -i 's/user = www-data/user = nginx/g' /etc/php7/php-fpm.d/www.conf && \
     sed -i 's/group = www-data/group = nginx/g' /etc/php7/php-fpm.d/www.conf && \
     sed -i 's/;cgi.fix_pathinfo=1/cgi.fix_pathinfo=0/g' /etc/php7/php.ini && \
-    # Opcache configuration
-    sed -i 's/;opcache.enable=1/opcache.enable=1/g' /etc/php7/php.ini && \
-    sed -i 's/;opcache.memory_consumption=128/opcache.memory_consumption=128/g' /etc/php7/php.ini && \
-    sed -i 's/;opcache.interned_strings_buffer=8/opcache.interned_strings_buffer=8/g' /etc/php7/php.ini && \
-    sed -i 's/;opcache.max_accelerated_files=10000/opcache.max_accelerated_files=10000/g' /etc/php7/php.ini && \
-    sed -i 's/;opcache.max_wasted_percentage=5/opcache.max_wasted_percentage=5/g' /etc/php7/php.ini && \
-    sed -i 's/;opcache.validate_timestamps=1/opcache.validate_timestamps=1/g' /etc/php7/php.ini && \
-    sed -i 's/;opcache.revalidate_freq=2/opcache.revalidate_freq=300/g' /etc/php7/php.ini && \
+    sed -i 's/expose_php = On/expose_php = Off/g' /etc/php7/php.ini && \
     echo "daemonize yes" >> /etc/redis.conf && \
     ln -s /dev/null /var/log/nginx/access.log && \
     ln -s /dev/stdout /var/log/nginx/error.log && \
diff --git a/routes/web.php b/routes/web.php
index 9439cf8538d0eb44a06f0217128580926b45d563..16b658253b881a5d38385eea7c4137c440d95e78 100644
--- a/routes/web.php
+++ b/routes/web.php
@@ -87,9 +87,9 @@ Route::group(
 
         Route::get('beitritt', function () {
             if (LaravelLocalization::getCurrentLocale() === "de") {
-                return response()->file(storage_path('app/public/aufnahmeantrag-de.pdf'));
+                return response()->download(storage_path('app/public/aufnahmeantrag-de.pdf'), "SUMA-EV_Beitrittsformular_" . (new \DateTime())->format("Y_m_d") . ".pdf", ["Content-Type" => "application/pdf"]);
             } else {
-                return response()->file(storage_path('app/public/aufnahmeantrag-en.pdf'));
+                return response()->download(storage_path('app/public/aufnahmeantrag-en.pdf'), "SUMA-EV_Membershipform_" . (new \DateTime())->format("Y_m_d") . ".pdf", ["Content-Type" => "application/pdf"]);
             }
         });