diff --git a/README.md b/README.md
index 4b9684e9b..a2520a39e 100644
--- a/README.md
+++ b/README.md
@@ -17,7 +17,7 @@ there is a stable release**. The following setup instructions are intended for
 testing and development.
 
 ## Requirements
- - PHP >= 7.1.3 (7.2+ recommended for stable version)
+ - PHP >= 7.1.3 < 7.3 (7.2.x recommended for stable version)
  - MySQL >= 5.7, Postgres (MariaDB and sqlite are not supported yet)
  - Redis
  - Composer
diff --git a/contrib/docker/Dockerfile.apache b/contrib/docker/Dockerfile.apache
index 7f4b8742d..1bd5961e0 100644
--- a/contrib/docker/Dockerfile.apache
+++ b/contrib/docker/Dockerfile.apache
@@ -1,4 +1,4 @@
-FROM php:7-apache
+FROM php:7.2-apache
 
 ARG COMPOSER_VERSION="1.6.5"
 ARG COMPOSER_CHECKSUM="67bebe9df9866a795078bb2cf21798d8b0214f2e0b2fd81f2e907a8ef0be3434"
diff --git a/contrib/docker/Dockerfile.fpm b/contrib/docker/Dockerfile.fpm
index 6c7822ea0..93676b10e 100644
--- a/contrib/docker/Dockerfile.fpm
+++ b/contrib/docker/Dockerfile.fpm
@@ -1,4 +1,4 @@
-FROM php:7-fpm
+FROM php:7.2-fpm
 
 ARG COMPOSER_VERSION="1.6.5"
 ARG COMPOSER_CHECKSUM="67bebe9df9866a795078bb2cf21798d8b0214f2e0b2fd81f2e907a8ef0be3434"