diff --git a/Dockerfile b/Dockerfile
index 72154f0..e13db32 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -5,9 +5,9 @@ RUN apk add --no-cache libpng libpng-dev libjpeg-turbo-dev libwebp-dev zlib-dev
         && docker-php-ext-configure gd \
         && docker-php-ext-install gd
 
-RUN apk add --no-cache autoconf \
+RUN apk add --no-cache autoconf gcc g++ \
     && pecl install redis-5.1.1 \
     && docker-php-ext-enable redis \
-    && apk del autoconf
+    && apk del autoconf gcc g++
 
 RUN curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer