diff --git a/lib/Provider/BingWallpaperDaily.php b/lib/Provider/BingWallpaperDaily.php
index 45ef888..8f49121 100644
--- a/lib/Provider/BingWallpaperDaily.php
+++ b/lib/Provider/BingWallpaperDaily.php
@@ -84,6 +84,6 @@ public function getRandomImageUrlBySearchTerm($search, $size)
         }
 
         // Return default image if no Bing image is found
-        return (new NextcloudImage($this->appName, $this->logger, $this->config, $this->appData, "Nextcloud"))->getRandomImageUrl($size);
+        return (new NextcloudImage($this->appName, $this->logger, $this->config, $this->appData, $this->appManager, "Nextcloud"))->getRandomImageUrl($size);
     }
-}
\ No newline at end of file
+}
diff --git a/lib/Provider/UnsplashAPI.php b/lib/Provider/UnsplashAPI.php
index f011604..4fa4232 100644
--- a/lib/Provider/UnsplashAPI.php
+++ b/lib/Provider/UnsplashAPI.php
@@ -120,7 +120,7 @@ public function getRandomImageUrlBySearchTerm($search, $size): string
         if($token === '' && $this->requiresAuth()) {
             // If the token is empty, return the default image.
             $this->logger->alert("Unsplash API: the provided token was blank!");
-            return (new NextcloudImage($this->appName, $this->logger, $this->config, $this->appData, "Nextcloud"))->getRandomImageUrl($size);
+            return (new NextcloudImage($this->appName, $this->logger, $this->config, $this->appData, $this->appManager, "Nextcloud"))->getRandomImageUrl($size);
         }
 
         $url = "https://api.unsplash.com/photos/random?client_id=" . $this->getToken() . "&count=1&query=" . $search;
diff --git a/lib/Provider/WallhavenCC.php b/lib/Provider/WallhavenCC.php
index 3f56026..789cf88 100644
--- a/lib/Provider/WallhavenCC.php
+++ b/lib/Provider/WallhavenCC.php
@@ -79,7 +79,7 @@ public function getRandomImageUrlBySearchTerm($search, $size)
             $this->logger->alert("Your searchterms likely did not yield results for: ".$this->getName());
         }
 
-        return (new NextcloudImage($this->appName, $this->logger, $this->config, $this->appData, "Nextcloud"))->getRandomImageUrl($size);
+        return (new NextcloudImage($this->appName, $this->logger, $this->config, $this->appData, $this->appManager, "Nextcloud"))->getRandomImageUrl($size);
     }
 
     public function getCachedImageURL(): string
diff --git a/lib/Provider/WikimediaCommons.php b/lib/Provider/WikimediaCommons.php
index f084d81..6780455 100644
--- a/lib/Provider/WikimediaCommons.php
+++ b/lib/Provider/WikimediaCommons.php
@@ -64,6 +64,7 @@ public function getRandomImageUrlBySearchTerm($search, $size)
         $url .= '&format=json';
 
         $curl = curl_init($url);
+        curl_setopt($curl, CURLOPT_USERAGENT, $this->getUserAgent());
         curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
         $response = curl_exec($curl);
         $json = json_decode($response, true);
@@ -75,7 +76,7 @@ public function getRandomImageUrlBySearchTerm($search, $size)
             $this->logger->alert("Your searchterms likely did not yield results for: ".$this->getName());
         }
 
-        return (new NextcloudImage($this->appName, $this->logger, $this->config, $this->appData, "Nextcloud"))->getRandomImageUrl($size);
+        return (new NextcloudImage($this->appName, $this->logger, $this->config, $this->appData, $this->appManager, "Nextcloud"))->getRandomImageUrl($size);
     }
 
     public function getCachedImageURL(): string
diff --git a/lib/Provider/WikimediaCommonsDaily.php b/lib/Provider/WikimediaCommonsDaily.php
index 2ca37c2..5180d04 100644
--- a/lib/Provider/WikimediaCommonsDaily.php
+++ b/lib/Provider/WikimediaCommonsDaily.php
@@ -58,6 +58,7 @@ public function getRandomImageUrlBySearchTerm($search, $size)
         $url .= '&format=json';
 
         $curl = curl_init($url);
+        curl_setopt($curl, CURLOPT_USERAGENT, $this->getUserAgent());
         curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
         $response = curl_exec($curl);
         $json = json_decode($response, true);
@@ -69,7 +70,7 @@ public function getRandomImageUrlBySearchTerm($search, $size)
             $this->logger->alert("Your searchterms likely did not yield results for: ".$this->getName());
         }
 
-        return (new NextcloudImage($this->appName, $this->logger, $this->config, $this->appData, "Nextcloud"))->getRandomImageUrl($size);
+        return (new NextcloudImage($this->appName, $this->logger, $this->config, $this->appData, $this->appManager, "Nextcloud"))->getRandomImageUrl($size);
     }
 
     public function getCachedImageURL(): string
diff --git a/lib/ProviderHandler/Provider.php b/lib/ProviderHandler/Provider.php
index 278c448..a5eb9b4 100644
--- a/lib/ProviderHandler/Provider.php
+++ b/lib/ProviderHandler/Provider.php
@@ -24,6 +24,7 @@
 
 namespace OCA\Unsplash\ProviderHandler;
 
+use OCP\App\IAppManager;
 use OCP\Files\IAppData;
 use OCP\IConfig;
 use Psr\Log\LoggerInterface;
@@ -61,6 +62,7 @@ public function __construct(
         protected LoggerInterface $logger,
         protected IConfig $config,
         protected IAppData $appData,
+        protected IAppManager $appManager,
         protected string $providerName,
     )
     {
@@ -245,4 +247,28 @@ protected function getImageFolder()
         return $rootFolder;
     }
 
+    /**
+     *
+     * This returns the user agent string ('unsplash/<version> (<website>; <mail>)').
+     * Some image providers require a non-empty user agent, e.g. WikiMedia
+     *
+     * @return string
+     */
+    protected function getUserAgent()
+    {
+        $info = $this->appManager->getAppInfo($this->appName);
+        $name = $this->appName;
+        $version = $this->appManager->getAppVersion($name);
+        $website = $info['website'];
+        $mail = "";
+
+        foreach ($info['author'] as $author) {
+            if(!isset($author['@attributes']['mail'])) {
+                continue;
+            }
+            $mail = "; ".$author['@attributes']['mail'];
+        }
+
+        return $name."/".$version." (".$website.$mail.")";
+    }
 }
diff --git a/lib/ProviderHandler/ProviderDefinitions.php b/lib/ProviderHandler/ProviderDefinitions.php
index cf8e1ee..01849f8 100644
--- a/lib/ProviderHandler/ProviderDefinitions.php
+++ b/lib/ProviderHandler/ProviderDefinitions.php
@@ -29,6 +29,7 @@
 use OCA\Unsplash\Provider\WallhavenCC;
 use OCA\Unsplash\Provider\WikimediaCommons;
 use OCA\Unsplash\Provider\WikimediaCommonsDaily;
+use OCP\App\IAppManager;
 use OCP\Files\IAppData;
 use OCP\IConfig;
 use Psr\Log\LoggerInterface;
@@ -63,22 +64,23 @@ class ProviderDefinitions
      * @param IConfig $settings
      * @param IAppData $appData
      */
-    function __construct($appName, LoggerInterface $logger, IConfig $config, IAppData $appData)
+    function __construct($appName, LoggerInterface $logger, IConfig $config, IAppData $appData, IAppManager $appManager)
     {
 
         $this->appName = $appName;
         $this->config = $config;
         $this->appData = $appData;
         $this->logger = $logger;
+        $this->appManager = $appManager;
 
         $tmp = [];
         //add all provider to this array. The logic takes care of the rest.
-        $tmp[] = new UnsplashAPI($this->appName, $logger, $this->config, $appData, "UnsplashAPI");
-        $tmp[] = new NextcloudImage($this->appName, $logger, $this->config, $appData, "Nextcloud Image");
-        $tmp[] = new WikimediaCommons($this->appName, $logger, $this->config, $appData, "WikimediaCommons");
-        $tmp[] = new WikimediaCommonsDaily($this->appName, $logger, $this->config, $appData, "WikimediaCommons - Picture of the Day");
-        $tmp[] = new WallhavenCC($this->appName, $logger, $this->config, $appData, "WallhavenCC");
-        $tmp[] = new BingWallpaperDaily($this->appName, $logger, $this->config, $appData, "Bing Wallpaper - Picture of the Day");
+        $tmp[] = new UnsplashAPI($this->appName, $logger, $this->config, $appData, $appManager, "UnsplashAPI");
+        $tmp[] = new NextcloudImage($this->appName, $logger, $this->config, $appData, $appManager, "Nextcloud Image");
+        $tmp[] = new WikimediaCommons($this->appName, $logger, $this->config, $appData, $appManager, "WikimediaCommons");
+        $tmp[] = new WikimediaCommonsDaily($this->appName, $logger, $this->config, $appData, $appManager, "WikimediaCommons - Picture of the Day");
+        $tmp[] = new WallhavenCC($this->appName, $logger, $this->config, $appData, $appManager, "WallhavenCC");
+        $tmp[] = new BingWallpaperDaily($this->appName, $logger, $this->config, $appData, $appManager, "Bing Wallpaper - Picture of the Day");
 
         foreach ($tmp as &$value) {
             $this->definitions[$value->getName()] = $value;
@@ -96,11 +98,11 @@ function getProviderByName($name): Provider
 
         if (!array_key_exists($name, $this->definitions)) {
             $this->logger->warning("Selected provider '{$name}' could not be found. Using Default. Please select an existing provider in the settings!");
-            return new WikimediaCommonsDaily($this->appName, $this->logger, $this->config, $this->appData, "WikimediaCommons - Picture of the Day");
+            return new WikimediaCommonsDaily($this->appName, $this->logger, $this->config, $this->appData, $this->appManager, "WikimediaCommons - Picture of the Day");
         }
         $provider = $this->definitions[$name];
         if ($provider == null) {
-            return new WikimediaCommonsDaily($this->appName, $this->logger, $this->config, $this->appData, "WikimediaCommons - Picture of the Day");
+            return new WikimediaCommonsDaily($this->appName, $this->logger, $this->config, $this->appData, $this->appManager, "WikimediaCommons - Picture of the Day");
         }
         return $this->definitions[$name];
     }
diff --git a/lib/Services/SettingsService.php b/lib/Services/SettingsService.php
index 4a19e71..4d743e7 100644
--- a/lib/Services/SettingsService.php
+++ b/lib/Services/SettingsService.php
@@ -9,6 +9,7 @@
 use OCA\Unsplash\ProviderHandler\CachedProvider;
 use OCA\Unsplash\ProviderHandler\Provider;
 use OCA\Unsplash\ProviderHandler\ProviderDefinitions;
+use OCP\App\IAppManager;
 use OCP\Files\IAppData;
 use OCP\IConfig;
 use Psr\Log\LoggerInterface;
@@ -63,6 +64,11 @@ class SettingsService
      */
     private $defaults;
 
+    /**
+     * @var IAppManager
+     */
+    protected $appManager;
+
     /**
      * FaviconService constructor.
      *
@@ -73,7 +79,7 @@ class SettingsService
      * @param Defaults $defaults
      * @param LoggerInterface $logger
      */
-    public function __construct($userId, $appName, IConfig $config, IAppData $appData, \OC_Defaults $defaults, LoggerInterface $logger)
+    public function __construct($userId, $appName, IConfig $config, IAppData $appData, \OC_Defaults $defaults, LoggerInterface $logger, IAppManager $appManager)
     {
         $this->config = $config;
         $this->userId = $userId;
@@ -82,7 +88,7 @@ public function __construct($userId, $appName, IConfig $config, IAppData $appDat
         }
         $this->appName = $appName;
 
-        $this->providerDefinitions = new ProviderDefinitions($this->appName, $logger, $this->config, $appData);
+        $this->providerDefinitions = new ProviderDefinitions($this->appName, $logger, $this->config, $appData, $appManager);
         $this->defaults = $defaults;
     }