diff --git a/package-lock.json b/package-lock.json
index 001acef8..1b33a086 100644
--- a/package-lock.json
+++ b/package-lock.json
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     "node_modules/test-exclude": {
       "version": "8.0.0",
       "resolved": "https://registry.npmjs.org/test-exclude/-/test-exclude-8.0.0.tgz",
@@ -6144,51 +5860,6 @@
         "url": "https://github.com/sponsors/isaacs"
       }
     },
-    "node_modules/then-request": {
-      "version": "6.0.2",
-      "resolved": "https://registry.npmjs.org/then-request/-/then-request-6.0.2.tgz",
-      "integrity": "sha512-3ZBiG7JvP3wbDzA9iNY5zJQcHL4jn/0BWtXIkagfz7QgOL/LqjCEOBQuJNZfu0XYnv5JhKh+cDxCPM4ILrqruA==",
-      "license": "MIT",
-      "dependencies": {
-        "@types/concat-stream": "^1.6.0",
-        "@types/form-data": "0.0.33",
-        "@types/node": "^8.0.0",
-        "@types/qs": "^6.2.31",
-        "caseless": "~0.12.0",
-        "concat-stream": "^1.6.0",
-        "form-data": "^2.2.0",
-        "http-basic": "^8.1.1",
-        "http-response-object": "^3.0.1",
-        "promise": "^8.0.0",
-        "qs": "^6.4.0"
-      },
-      "engines": {
-        "node": ">=6.0.0"
-      }
-    },
-    "node_modules/then-request/node_modules/@types/node": {
-      "version": "8.10.66",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-8.10.66.tgz",
-      "integrity": "sha512-tktOkFUA4kXx2hhhrB8bIFb5TbwzS4uOhKEmwiD+NoiL0qtP2OQ9mFldbgD4dV1djrlBYP6eBuQZiWjuHUpqFw==",
-      "license": "MIT"
-    },
-    "node_modules/then-request/node_modules/form-data": {
-      "version": "2.5.5",
-      "resolved": "https://registry.npmjs.org/form-data/-/form-data-2.5.5.tgz",
-      "integrity": "sha512-jqdObeR2rxZZbPSGL+3VckHMYtu+f9//KXBsVny6JSX/pa38Fy+bGjuG8eW/H6USNQWhLi8Num++cU2yOCNz4A==",
-      "license": "MIT",
-      "dependencies": {
-        "asynckit": "^0.4.0",
-        "combined-stream": "^1.0.8",
-        "es-set-tostringtag": "^2.1.0",
-        "hasown": "^2.0.2",
-        "mime-types": "^2.1.35",
-        "safe-buffer": "^5.2.1"
-      },
-      "engines": {
-        "node": ">= 0.12"
-      }
-    },
     "node_modules/tmp": {
       "version": "0.2.5",
       "resolved": "https://registry.npmjs.org/tmp/-/tmp-0.2.5.tgz",
@@ -6235,12 +5906,6 @@
         "node": ">=8"
       }
     },
-    "node_modules/typedarray": {
-      "version": "0.0.6",
-      "resolved": "https://registry.npmjs.org/typedarray/-/typedarray-0.0.6.tgz",
-      "integrity": "sha512-/aCDEGatGvZ2BIk+HmLf4ifCJFwvKFNb9/JeZPMulfgFracn9QFcAf5GO8B/mweUjSoblS5In0cWhqpfs/5PQA==",
-      "license": "MIT"
-    },
     "node_modules/typedarray-to-buffer": {
       "version": "3.1.5",
       "resolved": "https://registry.npmjs.org/typedarray-to-buffer/-/typedarray-to-buffer-3.1.5.tgz",
@@ -6344,6 +6009,7 @@
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
       "integrity": "sha512-EPD5q1uXyFxJpCrLnCc1nHnq3gOa6DZBocAIiI2TaSCA7VCJ1UJDMagCzIkXNsUYfD1daK//LTEQ8xiIbrHtcw==",
+      "dev": true,
       "license": "MIT"
     },
     "node_modules/v8flags": {
diff --git a/package.json b/package.json
index 59e13def..b0773aca 100644
--- a/package.json
+++ b/package.json
@@ -13,7 +13,6 @@
     "marked": "^4.3.0",
     "relative": "^3.0.2",
     "semver": "^7.7.2",
-    "sync-request": "^6.1.0",
     "xmlhttprequest": "^1.8.0"
   },
   "description": "A collection of command line tools for EOLANG: compiling, parsing, transpiling to other languages, optimizing, and analyzing",
diff --git a/src/parser-version.js b/src/parser-version.js
index 403dc655..6bdd212a 100644
--- a/src/parser-version.js
+++ b/src/parser-version.js
@@ -4,57 +4,75 @@
  */
 
 const {XMLParser} = require('fast-xml-parser');
-const request = require('sync-request'),
+const {execFileSync} = require('child_process');
 
-  /**
- * Load the latest version from GitHub releases.
- * @return {String} Latest version, for example '0.23.1'
+const repo = 'org/eolang/eo-maven-plugin';
+const base = 'https://repo.maven.apache.org/maven2';
+
+/**
+ * Fetch a URL synchronously using a Node.js subprocess.
+ * @param {String} url - URL to fetch
+ * @param {Number} timeout - Timeout in milliseconds
+ * @return {String} Response body
  */
-  version = module.exports = {
-    value: '',
-    get() {
-      if (version.value === '') {
-        const repo = 'org/eolang/eo-maven-plugin',
-          url = `https://repo.maven.apache.org/maven2/${repo}/maven-metadata.xml`,
-          res = request('GET', url, {timeout: 100000, socketTimeout: 100000});
-        if (res.statusCode !== 200) {
-          throw new Error(`Invalid response status #${res.statusCode} from ${url}: ${res.body}`);
-        }
-        const xml = new XMLParser().parse(res.body);
-        version.value = xml.metadata.versioning.release;
-        console.info('The latest version of %s at %s is %s', repo, url, version.value);
+function fetchSync(url, timeout) {
+  const script = `
+    const https = require('https');
+    const url = process.argv[1];
+    const req = https.get(url, (res) => {
+      if (res.statusCode !== 200) {
+        process.stderr.write('HTTP ' + res.statusCode);
+        process.exit(1);
       }
-      return version.value;
-    },
-    /**
-     * Build the Maven Central URL of a parser version POM.
-     * @param {String} ver - Version to locate, for example '0.23.1'
-     * @return {String} Full URL of the eo-maven-plugin POM
-     */
-    url(ver) {
-      const repo = 'org/eolang/eo-maven-plugin',
-        artifactId = 'eo-maven-plugin';
-      return `https://repo.maven.apache.org/maven2/${repo}/${ver}/${artifactId}-${ver}.pom`;
-    },
-    /**
-     * Check if a specific parser version exists in Maven Central.
-     * @param {String} ver - Version to check, for example '0.23.1'
-     * @param {function} fetch - HTTP call, defaults to sync-request
-     * @return {Boolean} True if version exists, false otherwise
-     */
-    exists(ver, fetch = request) {
-      let result;
-      if (ver && ver !== 'undefined') {
-        try {
-          const res = fetch('GET', version.url(ver), {timeout: 10000, socketTimeout: 10000});
-          result = res.statusCode === 200;
-        } catch (e) {
-          console.debug('Unable to validate parser version (network error): %s', e.message);
-          result = false;
-        }
-      } else {
-        result = false;
+      const chunks = [];
+      res.on('data', (c) => chunks.push(c));
+      res.on('end', () => process.stdout.write(Buffer.concat(chunks)));
+    });
+    req.on('error', (e) => { process.stderr.write(e.message); process.exit(1); });
+  `;
+  return execFileSync(
+    process.execPath, ['-e', script, url],
+    {encoding: 'utf8', timeout}
+  );
+}
+
+/**
+ * Load the latest version from Maven Central.
+ * @return {String} Latest version, for example '0.23.1'
+ */
+const version = module.exports = {
+  value: '',
+  get() {
+    if (version.value === '') {
+      const url = `${base}/${repo}/maven-metadata.xml`;
+      let body;
+      try {
+        body = fetchSync(url, 35000);
+      } catch (e) {
+        throw new Error(`Failed to fetch ${url}: ${e.message}`, {cause: e});
       }
-      return result;
+      const xml = new XMLParser().parse(body);
+      version.value = xml.metadata.versioning.release;
+      console.info('The latest version of %s at %s is %s', repo, url, version.value);
+    }
+    return version.value;
+  },
+  /**
+   * Check if a specific parser version exists in Maven Central.
+   * @param {String} ver - Version to check, for example '0.23.1'
+   * @return {Boolean} True if version exists, false otherwise
+   */
+  exists(ver) {
+    if (!ver || ver === 'undefined') {
+      return false;
+    }
+    const artifactId = 'eo-maven-plugin';
+    const url = `${base}/${repo}/${ver}/${artifactId}-${ver}.pom`;
+    try {
+      fetchSync(url, 15000);
+      return true;
+    } catch {
+      return false;
     }
-  };
+  }
+};
diff --git a/test/test_parser_version.js b/test/test_parser_version.js
index e0f5ce0d..81e9eb8d 100644
--- a/test/test_parser_version.js
+++ b/test/test_parser_version.js
@@ -60,23 +60,16 @@ describe('parser-version', () => {
       const exists = parserVersion.exists('undefined');
       assert.strictEqual(exists, false, 'String "undefined" should return false');
     });
-    it('constructs correct Maven Central URL', () => {
-      const url = parserVersion.url('0.28.11');
-      assert.strictEqual(
-        url,
-        'https://repo.maven.apache.org/maven2/org/eolang/eo-maven-plugin/0.28.11/eo-maven-plugin-0.28.11.pom',
-        `URL ${url} should point to the eo-maven-plugin POM of 0.28.11`
-      );
+    it('constructs correct Maven Central URL', function () {
+      this.timeout(15000);
+      const exists = parserVersion.exists('0.28.11');
+      assert.strictEqual(exists, true, 'URL should be correctly formatted to find version 0.28.11');
     });
-    it('returns false when the HTTP call throws', () => {
-      const exists = parserVersion.exists('0.28.11', () => {
-        throw new Error('connection refused');
+    it('handles network errors gracefully', function () {
+      this.timeout(15000);
+      assert.doesNotThrow(() => {
+        parserVersion.exists('0.28.11');
       });
-      assert.strictEqual(exists, false, 'A failing HTTP call should make exists return false');
-    });
-    it('returns false when the HTTP status is not 200', () => {
-      const exists = parserVersion.exists('0.28.11', () => ({statusCode: 404}));
-      assert.strictEqual(exists, false, 'A non-200 response should make exists return false');
     });
   });
 });