diff --git a/Dockerfile b/Dockerfile
index bd071ed..7e14c01 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM golang:1.15.13-buster@sha256:c20d0ffe915a73d004d013fb6d6fcd5e70d6c628be73b31bd206fd55cee7bc2a as build
+FROM golang:1.15.13-buster@sha256:1764491bf051d8b6aec373ff9c75f99d6f799791b4eb723c11e2f79c3cf88e19 as build
 
 # renovate: datasource=github-tags depName=strukturag/nextcloud-spreed-signaling versioning=semver
 ENV SPREED_SIGNALING_VERSION v0.2.0