diff --git a/Dockerfile b/Dockerfile
index 22d5bbb..b0d0a92 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM ghcr.io/actions/actions-runner:2.314.1 AS base
+FROM ghcr.io/actions/actions-runner:2.315.0@sha256:45f609ab5bd691735dbb25e3636db2f5142fcd8f17de635424f2e7cbd3e16bc9 AS base
 USER root
 RUN apt-get update \
     && apt-get -y install curl git \