diff --git a/10.0/apache/Dockerfile b/10.0/apache/Dockerfile
index b482cb8..8009472 100644
--- a/10.0/apache/Dockerfile
+++ b/10.0/apache/Dockerfile
@@ -19,7 +19,7 @@ RUN apt-get update && apt-get install -y \
 RUN debMultiarch="$(dpkg-architecture --query DEB_BUILD_MULTIARCH)" \
   && docker-php-ext-configure gd --with-png-dir=/usr --with-jpeg-dir=/usr \
   && docker-php-ext-configure ldap --with-libdir="lib/$debMultiarch" \
-  && docker-php-ext-install gd exif intl mbstring mcrypt ldap mysql opcache pdo_mysql pdo_pgsql pgsql zip
+  && docker-php-ext-install gd exif intl mbstring mcrypt ldap mysql opcache pdo_mysql pdo_pgsql pgsql zip pcntl
 
 # set recommended PHP.ini settings
 # see https://secure.php.net/manual/en/opcache.installation.php
diff --git a/10.0/fpm/Dockerfile b/10.0/fpm/Dockerfile
index a4faaef..afe8053 100644
--- a/10.0/fpm/Dockerfile
+++ b/10.0/fpm/Dockerfile
@@ -19,7 +19,7 @@ RUN apt-get update && apt-get install -y \
 RUN debMultiarch="$(dpkg-architecture --query DEB_BUILD_MULTIARCH)" \
   && docker-php-ext-configure gd --with-png-dir=/usr --with-jpeg-dir=/usr \
   && docker-php-ext-configure ldap --with-libdir="lib/$debMultiarch" \
-  && docker-php-ext-install gd exif intl mbstring mcrypt ldap mysql opcache pdo_mysql pdo_pgsql pgsql zip
+  && docker-php-ext-install gd exif intl mbstring mcrypt ldap mysql opcache pdo_mysql pdo_pgsql pgsql zip pcntl
 
 # set recommended PHP.ini settings
 # see https://secure.php.net/manual/en/opcache.installation.php
diff --git a/11.0/apache/Dockerfile b/11.0/apache/Dockerfile
index 9a6019b..6989c1c 100644
--- a/11.0/apache/Dockerfile
+++ b/11.0/apache/Dockerfile
@@ -19,7 +19,7 @@ RUN apt-get update && apt-get install -y \
 RUN debMultiarch="$(dpkg-architecture --query DEB_BUILD_MULTIARCH)" \
   && docker-php-ext-configure gd --with-png-dir=/usr --with-jpeg-dir=/usr \
   && docker-php-ext-configure ldap --with-libdir="lib/$debMultiarch" \
-  && docker-php-ext-install gd exif intl mbstring mcrypt ldap mysqli opcache pdo_mysql pdo_pgsql pgsql zip
+  && docker-php-ext-install gd exif intl mbstring mcrypt ldap mysqli opcache pdo_mysql pdo_pgsql pgsql zip pcntl
 
 # set recommended PHP.ini settings
 # see https://docs.nextcloud.com/server/12/admin_manual/configuration_server/server_tuning.html#enable-php-opcache
diff --git a/11.0/fpm/Dockerfile b/11.0/fpm/Dockerfile
index 3fe1574..8c33181 100644
--- a/11.0/fpm/Dockerfile
+++ b/11.0/fpm/Dockerfile
@@ -19,7 +19,7 @@ RUN apt-get update && apt-get install -y \
 RUN debMultiarch="$(dpkg-architecture --query DEB_BUILD_MULTIARCH)" \
   && docker-php-ext-configure gd --with-png-dir=/usr --with-jpeg-dir=/usr \
   && docker-php-ext-configure ldap --with-libdir="lib/$debMultiarch" \
-  && docker-php-ext-install gd exif intl mbstring mcrypt ldap mysqli opcache pdo_mysql pdo_pgsql pgsql zip
+  && docker-php-ext-install gd exif intl mbstring mcrypt ldap mysqli opcache pdo_mysql pdo_pgsql pgsql zip pcntl
 
 # set recommended PHP.ini settings
 # see https://docs.nextcloud.com/server/12/admin_manual/configuration_server/server_tuning.html#enable-php-opcache
diff --git a/12.0/apache/Dockerfile b/12.0/apache/Dockerfile
index 1377017..e95efce 100644
--- a/12.0/apache/Dockerfile
+++ b/12.0/apache/Dockerfile
@@ -19,7 +19,7 @@ RUN apt-get update && apt-get install -y \
 RUN debMultiarch="$(dpkg-architecture --query DEB_BUILD_MULTIARCH)" \
   && docker-php-ext-configure gd --with-png-dir=/usr --with-jpeg-dir=/usr \
   && docker-php-ext-configure ldap --with-libdir="lib/$debMultiarch" \
-  && docker-php-ext-install gd exif intl mbstring mcrypt ldap mysqli opcache pdo_mysql pdo_pgsql pgsql zip
+  && docker-php-ext-install gd exif intl mbstring mcrypt ldap mysqli opcache pdo_mysql pdo_pgsql pgsql zip pcntl
 
 # set recommended PHP.ini settings
 # see https://docs.nextcloud.com/server/12/admin_manual/configuration_server/server_tuning.html#enable-php-opcache
diff --git a/12.0/fpm/Dockerfile b/12.0/fpm/Dockerfile
index bcf3a3e..6eb0ec2 100644
--- a/12.0/fpm/Dockerfile
+++ b/12.0/fpm/Dockerfile
@@ -19,7 +19,7 @@ RUN apt-get update && apt-get install -y \
 RUN debMultiarch="$(dpkg-architecture --query DEB_BUILD_MULTIARCH)" \
   && docker-php-ext-configure gd --with-png-dir=/usr --with-jpeg-dir=/usr \
   && docker-php-ext-configure ldap --with-libdir="lib/$debMultiarch" \
-  && docker-php-ext-install gd exif intl mbstring mcrypt ldap mysqli opcache pdo_mysql pdo_pgsql pgsql zip
+  && docker-php-ext-install gd exif intl mbstring mcrypt ldap mysqli opcache pdo_mysql pdo_pgsql pgsql zip pcntl
 
 # set recommended PHP.ini settings
 # see https://docs.nextcloud.com/server/12/admin_manual/configuration_server/server_tuning.html#enable-php-opcache
diff --git a/Dockerfile-php7.template b/Dockerfile-php7.template
index 89e23b8..a0c66de 100644
--- a/Dockerfile-php7.template
+++ b/Dockerfile-php7.template
@@ -19,7 +19,7 @@ RUN apt-get update && apt-get install -y \
 RUN debMultiarch="$(dpkg-architecture --query DEB_BUILD_MULTIARCH)" \
   && docker-php-ext-configure gd --with-png-dir=/usr --with-jpeg-dir=/usr \
   && docker-php-ext-configure ldap --with-libdir="lib/$debMultiarch" \
-  && docker-php-ext-install gd exif intl mbstring mcrypt ldap mysqli opcache pdo_mysql pdo_pgsql pgsql zip
+  && docker-php-ext-install gd exif intl mbstring mcrypt ldap mysqli opcache pdo_mysql pdo_pgsql pgsql zip pcntl
 
 # set recommended PHP.ini settings
 # see https://docs.nextcloud.com/server/12/admin_manual/configuration_server/server_tuning.html#enable-php-opcache
diff --git a/Dockerfile.template b/Dockerfile.template
index a25bdb6..53c7ee4 100644
--- a/Dockerfile.template
+++ b/Dockerfile.template
@@ -19,7 +19,7 @@ RUN apt-get update && apt-get install -y \
 RUN debMultiarch="$(dpkg-architecture --query DEB_BUILD_MULTIARCH)" \
   && docker-php-ext-configure gd --with-png-dir=/usr --with-jpeg-dir=/usr \
   && docker-php-ext-configure ldap --with-libdir="lib/$debMultiarch" \
-  && docker-php-ext-install gd exif intl mbstring mcrypt ldap mysql opcache pdo_mysql pdo_pgsql pgsql zip
+  && docker-php-ext-install gd exif intl mbstring mcrypt ldap mysql opcache pdo_mysql pdo_pgsql pgsql zip pcntl
 
 # set recommended PHP.ini settings
 # see https://secure.php.net/manual/en/opcache.installation.php