diff --git a/Dockerfile b/Dockerfile
index 32e440c0..fea0bd34 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -8,7 +8,9 @@ RUN apt-get update && \
     apt-get install --yes --no-install-recommends \
       nginx \
       zlib1g-dev \
+      libzip-dev \
       libmemcached-dev && \
+    docker-php-ext-install zip && \
     pecl install memcached && \
     docker-php-ext-enable memcached && \
     mv "$PHP_INI_DIR/php.ini-production" "$PHP_INI_DIR/php.ini"
diff --git a/README.md b/README.md
index f74b6a46..0b9e8b04 100644
--- a/README.md
+++ b/README.md
@@ -69,6 +69,7 @@ RSS-Bridge requires PHP 7.1 or higher with following extensions enabled:
   - [`curl`](https://secure.php.net/manual/en/book.curl.php)
   - [`json`](https://secure.php.net/manual/en/book.json.php)
   - [`filter`](https://secure.php.net/manual/en/book.filter.php)
+  - [`zip`](https://secure.php.net/manual/en/book.zip.php) (for some bridges)
   - [`sqlite3`](https://www.php.net/manual/en/book.sqlite3.php) (only when using SQLiteCache)
 
 Find more information on our [Documentation](https://rss-bridge.github.io/rss-bridge/index.html)
diff --git a/docs/01_General/03_Requirements.md b/docs/01_General/03_Requirements.md
index 98b0e33f..7fa2c739 100644
--- a/docs/01_General/03_Requirements.md
+++ b/docs/01_General/03_Requirements.md
@@ -10,6 +10,7 @@
   - [`curl`](https://secure.php.net/manual/en/book.curl.php) extension
   - [`json`](https://secure.php.net/manual/en/book.json.php) extension
   - [`filter`](https://secure.php.net/manual/en/book.filter.php) extension
+  - [`zip`](https://secure.php.net/manual/en/book.zip.php) (for some bridges)
   - [`sqlite3`](http://php.net/manual/en/book.sqlite3.php) extension (only when using SQLiteCache)
 
 Enable extensions by un-commenting the corresponding line in your PHP configuration (`php.ini`).