diff --git a/docker/php/Dockerfile b/docker/php/Dockerfile
index 48bd5f79c5..405b907018 100644
--- a/docker/php/Dockerfile
+++ b/docker/php/Dockerfile
@@ -2,7 +2,16 @@ FROM php:fpm-alpine
 
 RUN apk update && apk add gettext-dev icu-dev zlib-dev libpng-dev gmp-dev postgresql-dev
 
-ARG exts="bcmath exif gd gettext gmp intl mysqli opcache pdo pdo_pgsql pgsql"
+ARG exts=" bcmath exif gd gettext gmp intl mysqli opcache pdo pdo_pgsql pgsql"
 
-RUN docker-php-ext-install ${exts} \
-    && docker-php-ext-enable ${exts}
+ARG MEMCACHED_DEPS="zlib-dev libmemcached-dev cyrus-sasl-dev"
+RUN apk add libmemcached-libs zlib
+RUN apk add --virtual .phpize-deps $PHPIZE_DEPS \
+        && apk add --virtual .memcached-deps $MEMCACHED_DEPS \
+        && pecl install memcached \
+        && echo "extension=memcached.so" > /usr/local/etc/php/conf.d/20_memcached.ini \
+        && rm -rf /usr/share/php7 \
+        && rm -rf /tmp/* \
+        && apk del .memcached-deps .phpize-deps
+
+RUN docker-php-ext-install ${exts}