diff --git a/package.json b/package.json
index 39aaaacb..4f4a6a81 100644
--- a/package.json
+++ b/package.json
@@ -48,7 +48,7 @@
     "husky": "7.0.2",
     "lint-staged": "11.1.2",
     "npm-run-all": "4.1.5",
-    "prettier": "2.3.2",
+    "prettier": "2.4.0",
     "standard-version": "9.3.1",
     "ts-node": "10.2.1",
     "typescript": "4.4.2"
diff --git a/src/docker.ts b/src/docker.ts
index f60a48a6..8827b94f 100644
--- a/src/docker.ts
+++ b/src/docker.ts
@@ -1,7 +1,7 @@
 class Docker {
   readonly repository = 'renovate/renovate';
   // renovate: datasource=docker depName=renovate/renovate versioning=docker
-  readonly tag = '27.8.2-slim';
+  readonly tag = '27.11.1-slim';
   readonly tagSuffix = '-slim';
 
   image(): string {
diff --git a/yarn.lock b/yarn.lock
index 858de1b5..475c444b 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2258,10 +2258,10 @@ prelude-ls@^1.2.1:
   resolved "https://registry.yarnpkg.com/prelude-ls/-/prelude-ls-1.2.1.tgz#debc6489d7a6e6b0e7611888cec880337d316396"
   integrity sha512-vkcDPrRZo1QZLbn5RLGPpg/WmIQ65qoWWhcGKf/b5eplkkarX0m9z8ppCat4mlOqUsWpyNuYgO3VRyrYHSzX5g==
 
-prettier@2.3.2:
-  version "2.3.2"
-  resolved "https://registry.yarnpkg.com/prettier/-/prettier-2.3.2.tgz#ef280a05ec253712e486233db5c6f23441e7342d"
-  integrity sha512-lnJzDfJ66zkMy58OL5/NY5zp70S7Nz6KqcKkXYzn2tMVrNxvbqaBpg7H3qHaLxCJ5lNMsGuM8+ohS7cZrthdLQ==
+prettier@2.4.0:
+  version "2.4.0"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-2.4.0.tgz#85bdfe0f70c3e777cf13a4ffff39713ca6f64cba"
+  integrity sha512-DsEPLY1dE5HF3BxCRBmD4uYZ+5DCbvatnolqTqcxEgKVZnL2kUfyu7b8pPQ5+hTBkdhU9SLUmK0/pHb07RE4WQ==
 
 process-nextick-args@~2.0.0:
   version "2.0.1"