diff --git a/Dockerfile b/Dockerfile
index 92f9ca5a..3bb3b33a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -14,7 +14,7 @@ WORKDIR /usr/src/app
 FROM base as tsbuild
 
 # renovate: datasource=npm versioning=npm
-RUN install-tool yarn 1.22.19
+RUN install-tool yarn 1.22.21
 
 COPY package.json yarn.lock ./
 RUN yarn install --production