diff --git a/lib/cartodb/api/template/tile-template-controller.js b/lib/cartodb/api/template/tile-template-controller.js
index de256ccb..e4d80663 100644
--- a/lib/cartodb/api/template/tile-template-controller.js
+++ b/lib/cartodb/api/template/tile-template-controller.js
@@ -12,48 +12,48 @@ const vectorError = require('../middlewares/vector-error');
 const rateLimit = require('../middlewares/rate-limit');
 const { RATE_LIMIT_ENDPOINTS_GROUPS } = rateLimit;
 
-function TileTemplateController (
-    namedMapProviderCache,
-    tileBackend,
-    surrogateKeysCache,
-    pgConnection,
-    authBackend,
-    userLimitsBackend
-) {
-    this.namedMapProviderCache = namedMapProviderCache;
-    this.tileBackend = tileBackend;
-    this.surrogateKeysCache = surrogateKeysCache;
-    this.pgConnection = pgConnection;
-    this.authBackend = authBackend;
-    this.userLimitsBackend = userLimitsBackend;
-}
+module.exports = class TileTemplateController {
+    constructor (
+        namedMapProviderCache,
+        tileBackend,
+        surrogateKeysCache,
+        pgConnection,
+        authBackend,
+        userLimitsBackend
+    ) {
+        this.namedMapProviderCache = namedMapProviderCache;
+        this.tileBackend = tileBackend;
+        this.surrogateKeysCache = surrogateKeysCache;
+        this.pgConnection = pgConnection;
+        this.authBackend = authBackend;
+        this.userLimitsBackend = userLimitsBackend;
+    }
 
-module.exports = TileTemplateController;
-
-TileTemplateController.prototype.register = function (templateRouter) {
-    templateRouter.get(
-        `/:template_id/:layer/:z/:x/:y.(:format)`,
-        coordinates(),
-        credentials(),
-        authorize(this.authBackend),
-        dbConnSetup(this.pgConnection),
-        rateLimit(this.userLimitsBackend, RATE_LIMIT_ENDPOINTS_GROUPS.NAMED_TILES),
-        cleanUpQueryParams(),
-        namedMapProvider({
-            namedMapProviderCache: this.namedMapProviderCache,
-            label: 'NAMED_MAP_TILE'
-        }),
-        getTile({
-            tileBackend: this.tileBackend,
-            label: 'NAMED_MAP_TILE'
-        }),
-        setContentTypeHeader(),
-        cacheControlHeader(),
-        cacheChannelHeader(),
-        surrogateKeyHeader({ surrogateKeysCache: this.surrogateKeysCache }),
-        lastModifiedHeader(),
-        vectorError()
-    );
+    register (templateRouter) {
+        templateRouter.get(
+            `/:template_id/:layer/:z/:x/:y.(:format)`,
+            coordinates(),
+            credentials(),
+            authorize(this.authBackend),
+            dbConnSetup(this.pgConnection),
+            rateLimit(this.userLimitsBackend, RATE_LIMIT_ENDPOINTS_GROUPS.NAMED_TILES),
+            cleanUpQueryParams(),
+            namedMapProvider({
+                namedMapProviderCache: this.namedMapProviderCache,
+                label: 'NAMED_MAP_TILE'
+            }),
+            getTile({
+                tileBackend: this.tileBackend,
+                label: 'NAMED_MAP_TILE'
+            }),
+            setContentTypeHeader(),
+            cacheControlHeader(),
+            cacheChannelHeader(),
+            surrogateKeyHeader({ surrogateKeysCache: this.surrogateKeysCache }),
+            lastModifiedHeader(),
+            vectorError()
+        );
+    }
 };
 
 function getTile ({ tileBackend, label }) {