diff --git a/.github/workflows/checks.yml b/.github/workflows/checks.yml
index 024f8309b2..ec8ff06763 100644
--- a/.github/workflows/checks.yml
+++ b/.github/workflows/checks.yml
@@ -18,7 +18,7 @@ jobs:
       run: make check-file-and-folder-names-in-docs
 
     - name: run markdownlint
-      run: npx gulp lint-md
+      run: make markdownlint
 
   yamllint:
     runs-on: ubuntu-latest
diff --git a/Makefile b/Makefile
index 6f2cf5c809..196b270fbb 100644
--- a/Makefile
+++ b/Makefile
@@ -101,17 +101,8 @@ markdown-toc:
 
 .PHONY: markdownlint
 markdownlint:
-	@if ! npm ls markdownlint; then npm install; fi
-	@npx gulp lint-md
-
-.PHONY: markdownlint-old
-markdownlint-old:
-	@if ! npm ls markdownlint; then npm install; fi
-	@for f in $(ALL_DOCS); do \
-		echo $$f; \
-		npx --no -p markdownlint-cli markdownlint -c .markdownlint.yaml $$f \
-			|| exit 1; \
-	done
+	@if ! npm ls markdownlint-cli; then npm install; fi
+	npx --no -- markdownlint-cli -c .markdownlint.yaml $(ALL_DOCS)
 
 .PHONY: install-yamllint
 install-yamllint:
diff --git a/gulpfile.js b/gulpfile.js
deleted file mode 100644
index b01927ecc0..0000000000
--- a/gulpfile.js
+++ /dev/null
@@ -1,64 +0,0 @@
-const gulp = require("gulp");
-const through2 = require("through2");
-const markdownlint = require("markdownlint");
-const yaml = require("js-yaml");
-const fs = require("fs");
-
-let numFilesProcessed = 0,
-  numFilesWithIssues = 0;
-
-function markdownLintFile(file, encoding, callback) {
-  const config = yaml.load(fs.readFileSync("./.markdownlint.yaml", "utf8"));
-  const options = {
-    files: [file.path],
-    config: config,
-  };
-
-  markdownlint(options, function (err, result) {
-    if (err) {
-      console.error("ERROR occurred while running markdownlint: ", err);
-      return callback(err);
-    }
-
-    const _resultString = (result || "").toString();
-    // Result is a string with lines of the form:
-    //
-    //   <file-path>:\s*<line-number>: <ID-and-message>
-    //
-    // Strip out any whitespace between the filepath and line number
-    // so that tools can jump directly to the line.
-    const resultString = _resultString
-      .split("\n")
-      .map((line) => line.replace(/^([^:]+):\s*(\d+):(.*)/, "$1:$2:$3"))
-      .join("\n");
-    if (resultString) {
-      console.log(resultString);
-      numFilesWithIssues++;
-      // Don't report an error yet so that other files can be checked:
-      // callback(new Error('...'));
-    }
-    numFilesProcessed++;
-    callback(null, file);
-  });
-}
-
-function lintMarkdown() {
-  const markdownFiles = ["**/*.md", "!**/node_modules/**", "!**/.github/**"];
-
-  return gulp
-    .src(markdownFiles)
-    .pipe(through2.obj(markdownLintFile))
-    .on("end", () => {
-      const fileOrFiles = "file" + (numFilesProcessed == 1 ? "" : "s");
-      const msg = `Processed ${numFilesProcessed} ${fileOrFiles}, ${numFilesWithIssues} had issues.`;
-      if (numFilesWithIssues > 0) {
-        throw new Error(msg);
-      } else {
-        console.log(msg);
-      }
-    });
-}
-
-lintMarkdown.description = `Run markdownlint on all '*.md' files.`;
-
-gulp.task("lint-md", lintMarkdown);
diff --git a/package.json b/package.json
index ef069a000a..6e32c045d4 100644
--- a/package.json
+++ b/package.json
@@ -9,14 +9,10 @@
     "test": "npm run check"
   },
   "devDependencies": {
-    "gulp": "^5.0.0",
-    "js-yaml": "^4.1.0",
     "markdown-link-check": "3.11.2",
     "markdown-toc": "^1.2.0",
-    "markdownlint": "0.36.1",
     "markdownlint-cli": "0.43.0",
-    "prettier": "^3.0.0",
-    "through2": "^4.0.2"
+    "prettier": "^3.0.0"
   },
   "prettier": {
     "proseWrap": "preserve"