diff --git a/Dockerfile b/Dockerfile
index 3101a5b..162c16e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -17,6 +17,7 @@ RUN \
 	curl \
 	imagemagick \
 	php7-bz2 \
+	php7-ctype \
 	php7-gd \
 	php7-ldap \
 	php7-xml \
diff --git a/Dockerfile.aarch64 b/Dockerfile.aarch64
index 63fc37b..c932e5f 100644
--- a/Dockerfile.aarch64
+++ b/Dockerfile.aarch64
@@ -17,6 +17,7 @@ RUN \
 	curl \
 	imagemagick \
 	php7-bz2 \
+	php7-ctype \
 	php7-gd \
 	php7-ldap \
 	php7-xml \
diff --git a/Dockerfile.armhf b/Dockerfile.armhf
index 9d6a92b..59183ef 100644
--- a/Dockerfile.armhf
+++ b/Dockerfile.armhf
@@ -17,6 +17,7 @@ RUN \
 	curl \
 	imagemagick \
 	php7-bz2 \
+	php7-ctype \
 	php7-gd \
 	php7-ldap \
 	php7-xml \
diff --git a/readme-vars.yml b/readme-vars.yml
index e458cfe..4eb4338 100644
--- a/readme-vars.yml
+++ b/readme-vars.yml
@@ -40,6 +40,7 @@ app_setup_block: |
   Upon first install go to `http://$IP:$PORT/install.php` once you have completed the setup, restart the container, login as admin and set "Use nice URLs" in the `admin/Configuration Settings` panel to `.htaccess` and tick `Use slash as namespace separator in URLs` to enable [nice URLs](https://www.dokuwiki.org/rewrite) you will find the webui at `http://$IP:$PORT/`, for more info see [{{ project_name|capitalize }}]({{ project_url }})
 # changelog
 changelogs:
+  - { date: "13.06.20:", desc: "Add php7-ctype package to support mdpage plugin."}
   - { date: "19.12.19:", desc: "Rebasing to alpine 3.11." }
   - { date: "01.12.19:", desc: "Add php7-ldap package to support LDAP authentication." }
   - { date: "28.05.19:", desc: "Initial Release." }