diff --git a/lib/app.js b/lib/app.js
index 9ed9fbafea..dbf036e4c6 100644
--- a/lib/app.js
+++ b/lib/app.js
@@ -10,7 +10,6 @@ const errorHandler = require('errorhandler');
 const unleashSession = require('./middleware/session');
 const responseTime = require('./middleware/response-time');
 const requestLogger = require('./middleware/request-logger');
-const validator = require('./middleware/validator');
 const simpleAuthentication = require('./middleware/simple-authentication');
 
 module.exports = function(config) {
@@ -33,7 +32,6 @@ module.exports = function(config) {
     app.use(unleashSession(config));
     app.use(responseTime(config));
     app.use(requestLogger(config));
-    app.use(validator(config));
 
     if (config.publicFolder) {
         app.use(favicon(path.join(config.publicFolder, 'favicon.ico')));
diff --git a/lib/error/validate-request.js b/lib/error/validate-request.js
deleted file mode 100644
index 21066c695e..0000000000
--- a/lib/error/validate-request.js
+++ /dev/null
@@ -1,15 +0,0 @@
-'use strict';
-
-const ValidationError = require('./validation-error');
-
-function validateRequest(req) {
-    return new Promise((resolve, reject) => {
-        if (req.validationErrors()) {
-            reject(new ValidationError('Invalid syntax'));
-        } else {
-            resolve(req);
-        }
-    });
-}
-
-module.exports = validateRequest;
diff --git a/lib/middleware/validator.js b/lib/middleware/validator.js
deleted file mode 100644
index 0cb71c33d3..0000000000
--- a/lib/middleware/validator.js
+++ /dev/null
@@ -1,11 +0,0 @@
-'use strict';
-
-const validator = require('express-validator');
-
-module.exports = function() {
-    return validator({
-        customValidators: {
-            isUrlFriendlyName: input => encodeURIComponent(input) === input,
-        },
-    });
-};
diff --git a/package.json b/package.json
index f72599eed2..ad74389c30 100644
--- a/package.json
+++ b/package.json
@@ -66,7 +66,6 @@
     "deep-diff": "^1.0.0",
     "errorhandler": "^1.5.0",
     "express": "^4.16.3",
-    "express-validator": "^5.2.0",
     "gravatar": "^1.6.0",
     "install": "^0.12.0",
     "joi": "^14.0.0",
diff --git a/yarn.lock b/yarn.lock
index 628713e686..41736b3ad8 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2352,14 +2352,6 @@ expand-tilde@^2.0.0, expand-tilde@^2.0.2:
   dependencies:
     homedir-polyfill "^1.0.1"
 
-express-validator@^5.2.0:
-  version "5.2.0"
-  resolved "https://registry.yarnpkg.com/express-validator/-/express-validator-5.2.0.tgz#28f068fc676022acfe182c97fd9e780f9ffb26f6"
-  integrity sha512-FyQ7gAaNwnIYvtfagy+fDrtzjNDFKRVjzplCPDXEu8fxSR/XBdXZHAtLR22446GWlw48LZPSKldqUVmySBWApA==
-  dependencies:
-    lodash "^4.17.10"
-    validator "^10.1.0"
-
 express@^4.16.3:
   version "4.16.3"
   resolved "https://registry.yarnpkg.com/express/-/express-4.16.3.tgz#6af8a502350db3246ecc4becf6b5a34d22f7ed53"
@@ -7232,11 +7224,6 @@ validate-npm-package-license@^3.0.1:
     spdx-correct "~1.0.0"
     spdx-expression-parse "~1.0.0"
 
-validator@^10.1.0:
-  version "10.2.0"
-  resolved "https://registry.yarnpkg.com/validator/-/validator-10.2.0.tgz#61d6b10c3d5c9f368c75c2ce8ca2b792522eaafa"
-  integrity sha512-gz/uknWtNfZTj1BLUzYHDxOoiQ7A4wZ6xPuuE6RpxswR4cNyT4I5kN9jmU0AQr7IBEap9vfYChI2TpssTN6Itg==
-
 vary@~1.1.2:
   version "1.1.2"
   resolved "https://registry.yarnpkg.com/vary/-/vary-1.1.2.tgz#2299f02c6ded30d4a5961b0b9f74524a18f634fc"