diff --git a/Dockerfile b/Dockerfile
index ddb8df6..3e8df2b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # syntax=docker/dockerfile:1
-FROM ruby:2.7
+FROM ruby:2.7.6
 RUN apt-get update -qq && apt-get install -y curl ldap-utils
 RUN curl -fsSL https://deb.nodesource.com/setup_lts.x | bash -
 RUN apt-get update && apt-get install -y nodejs