diff --git a/Dockerfile b/Dockerfile
index fab85e7..595ff7e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM golang:1.17.9-bullseye@sha256:5e415dc60e1277bd0fa3bd9f978ca58c8cf82ec6b6e0a7d67c2d1900e77039e2 as build
+FROM golang:1.18.1-bullseye@sha256:7c4f3edb000e9e0e8b2a3e30d1d4969c1bdca2dff3ba51fb3d965628e5a307f8 as build
 
 # renovate: datasource=github-tags depName=strukturag/nextcloud-spreed-signaling versioning=semver
 ENV SPREED_SIGNALING_VERSION v0.4.1