diff --git a/Dockerfile b/Dockerfile
index 64583d8..74382bd 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM golang:1.22-alpine3.20 AS builder
+FROM golang:1.23-alpine3.20 AS builder
 RUN apk add make git gcc musl-dev
 WORKDIR /work
 COPY . .
diff --git a/Makefile b/Makefile
index 403d877..f50d7ea 100644
--- a/Makefile
+++ b/Makefile
@@ -80,7 +80,7 @@ generate-in-docker: tidy $(HELM) $(YQ)
 
 .PHONY: check-generate
 check-generate:
-	@bash $(GARDENER_HACK_DIR)/check-generate.sh $(REPO_ROOT)
+	@$(REPO_ROOT)/vendor/github.com/gardener/gardener/hack/check-generate.sh $(REPO_ROOT)
 
 .PHONY: check
 check: $(GOIMPORTS) $(GOLANGCI_LINT) $(HELM)
diff --git a/go.mod b/go.mod
index 9ef1bb0..ccdaf9b 100644
--- a/go.mod
+++ b/go.mod
@@ -1,8 +1,6 @@
 module github.com/metal-stack/os-metal-extension
 
-go 1.22.2
-
-toolchain go1.22.6
+go 1.23
 
 require (
 	github.com/ahmetb/gen-crd-api-reference-docs v0.3.0