diff --git a/08-php-scalability/demo4/config/Dockerfile b/08-php-scalability/demo4/config/Dockerfile
index 402dad0..ffb5835 100644
--- a/08-php-scalability/demo4/config/Dockerfile
+++ b/08-php-scalability/demo4/config/Dockerfile
@@ -1,4 +1,4 @@
-FROM php:7.2-fpm
+FROM php:7.4.29-fpm
 
 RUN pecl install -o -f redis \
     &&  rm -rf /tmp/pear \