diff --git a/docker/Dockerfile b/docker/Dockerfile
index d954f19..c7f9f8e 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -1,4 +1,4 @@
-FROM php:7.3-cli
+FROM php:7.4-cli
 
 RUN apt-get update && apt-get install -y \
     libtidy-dev \