diff --git a/php-worker/Dockerfile-72 b/php-worker/Dockerfile-72
index 5a4a403c..1448498b 100644
--- a/php-worker/Dockerfile-72
+++ b/php-worker/Dockerfile-72
@@ -21,8 +21,8 @@ RUN apk --update add wget \
   libgsasl-dev \
   supervisor
 
-RUN docker-php-ext-install mysqli mbstring pdo pdo_mysql mcrypt tokenizer xml
-RUN pecl channel-update pecl.php.net && pecl install memcached && docker-php-ext-enable memcached
+RUN docker-php-ext-install mysqli mbstring pdo pdo_mysql tokenizer xml
+RUN pecl channel-update pecl.php.net && pecl install memcached mcrypt-1.0.1 && docker-php-ext-enable memcached
 
 # Install PostgreSQL drivers:
 ARG INSTALL_PGSQL=false