diff --git a/docs/generated/reference/.gitignore b/docs/generated/reference/.gitignore
index d28fd59a9..62c94b7cb 100644
--- a/docs/generated/reference/.gitignore
+++ b/docs/generated/reference/.gitignore
@@ -1,4 +1,3 @@
 /manifest.json
-/openapi
 /openapi-spec
 /includes
diff --git a/docs/generated/reference/BUILD.bazel b/docs/generated/reference/BUILD.bazel
index 4cfa083f9..6ef4a1879 100644
--- a/docs/generated/reference/BUILD.bazel
+++ b/docs/generated/reference/BUILD.bazel
@@ -29,7 +29,10 @@ filegroup(
 
 filegroup(
     name = "all-srcs",
-    srcs = [":package-srcs"],
+    srcs = [
+        ":package-srcs",
+        "//docs/generated/reference/openapi:all-srcs",
+    ],
     tags = ["automanaged"],
     visibility = ["//visibility:public"],
 )
diff --git a/docs/generated/reference/openapi/BUILD.bazel b/docs/generated/reference/openapi/BUILD.bazel
new file mode 100644
index 000000000..d242c7b54
--- /dev/null
+++ b/docs/generated/reference/openapi/BUILD.bazel
@@ -0,0 +1,28 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_library")
+
+go_library(
+    name = "go_default_library",
+    srcs = ["openapi_generated.go"],
+    importpath = "github.com/jetstack/cert-manager/docs/generated/reference/openapi",
+    tags = ["manual"],
+    visibility = ["//visibility:public"],
+    deps = [
+        "//vendor/github.com/go-openapi/spec:go_default_library",
+        "//vendor/k8s.io/apimachinery/pkg/apis/meta/v1:go_default_library",
+        "//vendor/k8s.io/kube-openapi/pkg/common:go_default_library",
+    ],
+)
+
+filegroup(
+    name = "package-srcs",
+    srcs = glob(["**"]),
+    tags = ["automanaged"],
+    visibility = ["//visibility:private"],
+)
+
+filegroup(
+    name = "all-srcs",
+    srcs = [":package-srcs"],
+    tags = ["automanaged"],
+    visibility = ["//visibility:public"],
+)
diff --git a/hack/BUILD.bazel b/hack/BUILD.bazel
index fa1dbe13e..272db197b 100644
--- a/hack/BUILD.bazel
+++ b/hack/BUILD.bazel
@@ -77,9 +77,10 @@ sh_binary(
     name = "update-codegen",
     srcs = ["update-codegen.sh"],
     data = [
+        "//hack:update-bazel",
         "//hack/boilerplate:all-srcs",
         "//third_party/k8s.io/code-generator:generate-groups",
-        "//third_party/k8s.io/code-generator:openapi-gen"
+        "//third_party/k8s.io/code-generator:openapi-gen",
     ],
 )
 
diff --git a/hack/update-codegen.sh b/hack/update-codegen.sh
index c4943f757..b0f07824c 100755
--- a/hack/update-codegen.sh
+++ b/hack/update-codegen.sh
@@ -43,6 +43,7 @@ echo "+++ Generating openapi_generated.go into 'github.com/jetstack/cert-manager
 # Generate Golang types for OpenAPI spec
 openapi-gen \
         --input-dirs github.com/jetstack/cert-manager/pkg/apis/certmanager/v1alpha1,k8s.io/apimachinery/pkg/apis/meta/v1,k8s.io/apimachinery/pkg/runtime,k8s.io/apimachinery/pkg/version \
+        --go-header-file "${runfiles}/hack/boilerplate/boilerplate.go.txt" \
         --output-package "github.com/jetstack/cert-manager/${OPENAPI_PATH_SEGMENT}"
 
 update-bazel.sh