diff --git a/assets/images/large-image.jpg b/assets/images/large-image.jpg
new file mode 100644
index 0000000000000000000000000000000000000000..c007781c27b4dbdf75b2f48e651be2442a99ba98
Binary files /dev/null and b/assets/images/large-image.jpg differ
diff --git a/assets/images/small-image.jpg b/assets/images/small-image.jpg
new file mode 100644
index 0000000000000000000000000000000000000000..5bf58a94932c306eaf01dce6561ef37afa513a11
Binary files /dev/null and b/assets/images/small-image.jpg differ
diff --git a/docs/index-test.md b/docs/index-test.md
index 8a9046a8ca557514ea5794885a5bc69edb9d7303..920aec3e2f3da9acabea6f1f7c8af492f019dc9c 100644
--- a/docs/index-test.md
+++ b/docs/index-test.md
@@ -120,12 +120,13 @@ end
 
 ### Small image
 
-![](https://assets-cdn.github.com/images/icons/emoji/octocat.png)
+![](../../assets/images/small-image.jpg)
 
 ### Large image
 
-![](https://guides.github.com/activities/hello-world/branching.png)
+![](../../assets/images/large-image.jpg)
 
+"[Wroclaw University Library digitizing rare archival texts](https://www.flickr.com/photos/97810305@N08/9401451269)" by [j_cadmus](https://www.flickr.com/photos/97810305@N08) is marked with [CC BY 2.0](https://creativecommons.org/licenses/by/2.0/?ref=openverse).
 
 ### Definition lists can be used with HTML syntax.
 
@@ -168,7 +169,7 @@ Term2
 
 : Second description of Term1 and Term2,
   possibly more than one line
-  
+
 ### More code
 
 ```
diff --git a/package-lock.json b/package-lock.json
index b38b270e28930f60b0c1b9c123133f60269fdacf..c013a6c1ad707c61d8984733c946e81544a35356 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -5938,9 +5938,9 @@
           }
         },
         "y18n": {
-          "version": "3.2.1",
-          "resolved": "https://registry.npmjs.org/y18n/-/y18n-3.2.1.tgz",
-          "integrity": "sha1-bRX7qITAhnnA136I53WegR4H+kE=",
+          "version": "3.2.2",
+          "resolved": "https://registry.npmjs.org/y18n/-/y18n-3.2.2.tgz",
+          "integrity": "sha512-uGZHXkHnhF0XeeAPgnKfPv1bgKAYyVvmNL1xlKsPYZPaIHxGti2hHqvOCQv71XMsLxu1QjergkqogUnms5D3YQ==",
           "dev": true
         },
         "yargs": {
@@ -6517,9 +6517,9 @@
       "dev": true
     },
     "y18n": {
-      "version": "4.0.0",
-      "resolved": "https://registry.npmjs.org/y18n/-/y18n-4.0.0.tgz",
-      "integrity": "sha512-r9S/ZyXu/Xu9q1tYlpsLIsa3EeLXXk0VwlxqTcFRfg9EhMW+17kbt9G0NrgCmhGb5vT2hyhJZLfDGx+7+5Uj/w==",
+      "version": "4.0.1",
+      "resolved": "https://registry.npmjs.org/y18n/-/y18n-4.0.1.tgz",
+      "integrity": "sha512-wNcy4NvjMYL8gogWWYAO7ZFWFfHcbdbE57tZO8e4cbpj8tfUcwrwqSl3ad8HxpYWCdXcJUCeKKZS62Av1affwQ==",
       "dev": true
     },
     "yaml": {