diff --git a/Makefile b/Makefile
index 526c105..0585113 100644
--- a/Makefile
+++ b/Makefile
@@ -11,3 +11,12 @@ generate-docs: lint
 		--volume "$(PWD):/terraform-docs" \
 		-w /terraform-docs \
 		quay.io/terraform-docs/terraform-docs:0.16.0 markdown table --config .terraform-docs.yml --output-file README.md --output-mode inject .
+
+# Renovate configuration test
+renovate-test:
+	@docker run --rm -it \
+		-u "0:0" \
+		-e LOG_LEVEL=debug \
+		-v "$(PWD)":/tmp/app \
+		--entrypoint bash \
+		renovate/renovate -lc "cp -av /tmp/app /usr/src && cd /usr/src/app && jq 'del(.extends)' /tmp/app/renovate.json >/usr/src/app/renovate.json && renovate --platform=local --dry-run"
diff --git a/renovate.json b/renovate.json
index 752d66a..138130d 100644
--- a/renovate.json
+++ b/renovate.json
@@ -1,6 +1,22 @@
 {
   "$schema": "https://docs.renovatebot.com/renovate-schema.json",
-  "extends": [
-    "github>sparkfabrik/renovatebot-default-configuration"
-  ]
+  "extends": ["github>sparkfabrik/renovatebot-default-configuration"],
+  "customManagers": [
+    {
+      "customType": "regex",
+      "fileMatch": ["Makefile"],
+      "matchStrings": ["TERRAFORM_DOCS_VERSION \\?= (?<currentValue>.*?)\n"],
+      "depNameTemplate": "terraform_docs_makefile",
+      "versioningTemplate": "semver-coerced",
+      "datasourceTemplate": "custom.terraform_docs_makefile"
+    }
+  ],
+  "customDatasources": {
+    "terraform_docs_makefile": {
+      "defaultRegistryUrlTemplate": "https://quay.io/api/v1/repository/terraform-docs/terraform-docs/tag/",
+      "transformTemplates": [
+        "{ \"releases\": $map($.tags, function($v) { { \"version\": $v.name } }) }"
+      ]
+    }
+  }
 }