diff --git a/.github/workflows/dialects.yml b/.github/workflows/dialects.yml
deleted file mode 100644
index ba3bb5f14..000000000
--- a/.github/workflows/dialects.yml
+++ /dev/null
@@ -1,34 +0,0 @@
-name: dialects
-
-on:
-  schedule:
-  - cron: '4 5 * * *'
-  workflow_dispatch:
-
-permissions:
-  contents: write
-
-jobs:
-  dialects:
-    runs-on: ubuntu-24.04
-
-    steps:
-    - uses: actions/setup-go@v7
-      with:
-        go-version: "1.26"
-
-    - run: go install mvdan.cc/gofumpt@v0.5.0
-
-    - uses: actions/checkout@v7
-
-    - run: make dialects-nodocker
-
-    - run: |
-        test -z "$(git status --porcelain)" ||
-        ( make test-nodocker \
-        && git add . \
-        && REV=$(curl -sL https://api.github.com/repos/mavlink/mavlink/branches/master | jq -r '.commit.sha') \
-        && git config user.name gomavlib-bot \
-        && git config user.email bot@gomavlib \
-        && git commit -m "(automatic) update dialects to rev https://github.com/mavlink/mavlink/tree/${REV}" \
-        && git push )
diff --git a/README.md b/README.md
index 0efa0dce4..408e86525 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,6 @@
 
 [![Test](https://github.com/bluenviron/gomavlib/actions/workflows/test.yml/badge.svg?branch=main)](https://github.com/bluenviron/gomavlib/actions/workflows/test.yml?query=branch%3Amain)
 [![Lint](https://github.com/bluenviron/gomavlib/actions/workflows/lint.yml/badge.svg?branch=main)](https://github.com/bluenviron/gomavlib/actions/workflows/lint.yml?query=branch%3Amain)
-[![Dialects](https://github.com/bluenviron/gomavlib/actions/workflows/dialects.yml/badge.svg?branch=main)](https://github.com/bluenviron/gomavlib/actions/workflows/dialects.yml?query=branch%3Amain)
 [![CodeCov](https://codecov.io/gh/bluenviron/gomavlib/branch/main/graph/badge.svg)](https://app.codecov.io/gh/bluenviron/gomavlib/tree/main)
 [![PkgGoDev](https://pkg.go.dev/badge/github.com/bluenviron/gomavlib/v4)](https://pkg.go.dev/github.com/bluenviron/gomavlib/v4#pkg-index)
 
diff --git a/scripts/dialects.mk b/scripts/dialects.mk
index 79894ceb3..f2cbf16b0 100644
--- a/scripts/dialects.mk
+++ b/scripts/dialects.mk
@@ -1,7 +1,6 @@
 define DOCKERFILE_DIALECTS
 FROM $(BASE_IMAGE)
 RUN apk add --no-cache git make
-RUN go install mvdan.cc/gofumpt@v0.5.0
 WORKDIR /s
 COPY go.mod go.sum ./
 RUN go mod download
@@ -12,8 +11,8 @@ dialects:
 	echo "$$DOCKERFILE_DIALECTS" | docker build . -f - -t temp
 	docker run --rm -it -v $(shell pwd):/s temp \
 	make dialects-nodocker
+	make format
 
 dialects-nodocker:
 	$(eval export CGO_ENABLED = 0)
 	go run ./cmd/dialects-gen
-	find ./pkg/dialects -type f -name '*.go' | xargs gofumpt -l -w