diff --git a/package.json b/package.json
index 94d161e..582cbcd 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
     "name": "interlanguage-checker",
-    "version": "1.13.3",
+    "version": "1.13.4",
     "description": "Check the consistency of MediaWiki interlanguage links in a simple overview.",
     "author": "Felix W. Dekker",
     "browser": "dist/bundle.js",
diff --git a/src/main/js/MediaWiki.ts b/src/main/js/MediaWiki.ts
index 312fa7f..79e06d1 100644
--- a/src/main/js/MediaWiki.ts
+++ b/src/main/js/MediaWiki.ts
@@ -324,7 +324,7 @@ export class MediaWiki {
     /**
      * The namespaces on this wiki.
      */
-    namespaces!: Map<number, { id: string, canonical: string, "*": string }>;
+    namespaces!: Map<number, { canonical: string, "*": string }>;
 
 
     /**
@@ -355,7 +355,13 @@ export class MediaWiki {
         this.general = query.general;
         this.interwikiMap =
             new Map(query.interwikimap.map((it: { prefix: string, url: string }) => [it.prefix, it.url]));
-        this.namespaces = query.namespaces;
+        this.namespaces =
+            new Map(
+                Object.keys(query.namespaces).map(id => {
+                    const props = query.namespaces[id];
+                    return [+id, {canonical: props.canonical, "*": props["*"]}];
+                })
+            );
 
         return this;
     }
@@ -437,9 +443,7 @@ export class MediaWiki {
         if (titleParts.length < 2) return new InterlangLink(normalLang, link.title);
 
         titleParts[0] = [...this.namespaces.values()].reduce(
-            (titlePart: string, namespace: { id: string, canonical: string, "*": string }) => {
-                return titlePart === namespace["canonical"] ? namespace["*"] : titlePart;
-            },
+            (titlePart, namespace) => titlePart === namespace["canonical"] ? namespace["*"] : titlePart,
             titleParts[0]
         );
         const normalTitle = titleParts.join(":");