diff --git a/Dockerfile b/Dockerfile
index 804050b0..6d0051d2 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-# syntax=docker/dockerfile:1.3
+# syntax=docker/dockerfile:1.4
 
 ARG GO_VERSION=1.17
 ARG DOCKERD_VERSION=20.10.8
diff --git a/docs/reference/buildx_build.md b/docs/reference/buildx_build.md
index ff89f0fa..94ecd614 100644
--- a/docs/reference/buildx_build.md
+++ b/docs/reference/buildx_build.md
@@ -429,7 +429,7 @@ Attribute keys:
 - `src`, `source` - Secret filename. `id` used if unset.
 
 ```dockerfile
-# syntax=docker/dockerfile:1.3
+# syntax=docker/dockerfile:1.4
 FROM python:3
 RUN pip install awscli
 RUN --mount=type=secret,id=aws,target=/root/.aws/credentials \
@@ -448,7 +448,7 @@ Attribute keys:
 - `env` - Secret environment variable. `id` used if unset, otherwise will look for `src`, `source` if `id` unset.
 
 ```dockerfile
-# syntax=docker/dockerfile:1.3
+# syntax=docker/dockerfile:1.4
 FROM node:alpine
 RUN --mount=type=bind,target=. \
   --mount=type=secret,id=SECRET_TOKEN \
@@ -480,7 +480,7 @@ authentication (e.g., cloning a private repository).
 Example to access Gitlab using an SSH agent socket:
 
 ```dockerfile
-# syntax=docker/dockerfile:1.3
+# syntax=docker/dockerfile:1.4
 FROM alpine
 RUN apk add --no-cache openssh-client
 RUN mkdir -p -m 0700 ~/.ssh && ssh-keyscan gitlab.com >> ~/.ssh/known_hosts
diff --git a/hack/dockerfiles/authors.Dockerfile b/hack/dockerfiles/authors.Dockerfile
index 68a1a90b..827ccc9b 100644
--- a/hack/dockerfiles/authors.Dockerfile
+++ b/hack/dockerfiles/authors.Dockerfile
@@ -1,4 +1,4 @@
-# syntax=docker/dockerfile:1.3-labs
+# syntax=docker/dockerfile:1.4
 
 FROM alpine:3.14 AS gen
 RUN apk add --no-cache git
diff --git a/hack/dockerfiles/docs.Dockerfile b/hack/dockerfiles/docs.Dockerfile
index b7a9d6aa..d2805315 100644
--- a/hack/dockerfiles/docs.Dockerfile
+++ b/hack/dockerfiles/docs.Dockerfile
@@ -1,4 +1,4 @@
-# syntax=docker/dockerfile:1.3-labs
+# syntax=docker/dockerfile:1.4
 
 ARG GO_VERSION=1.17
 ARG FORMATS=md,yaml
diff --git a/hack/dockerfiles/lint.Dockerfile b/hack/dockerfiles/lint.Dockerfile
index f0338a46..89b63459 100644
--- a/hack/dockerfiles/lint.Dockerfile
+++ b/hack/dockerfiles/lint.Dockerfile
@@ -1,4 +1,4 @@
-# syntax=docker/dockerfile:1.3
+# syntax=docker/dockerfile:1.4
 
 ARG GO_VERSION=1.17
 
diff --git a/hack/dockerfiles/vendor.Dockerfile b/hack/dockerfiles/vendor.Dockerfile
index 8620f276..387e07d9 100644
--- a/hack/dockerfiles/vendor.Dockerfile
+++ b/hack/dockerfiles/vendor.Dockerfile
@@ -1,4 +1,4 @@
-# syntax=docker/dockerfile:1.3-labs
+# syntax=docker/dockerfile:1.4
 
 ARG GO_VERSION=1.17
 ARG MODOUTDATED_VERSION=v0.8.0