diff --git a/examples/curl_display_curl_option_values.php b/examples/curl_display_curl_option_values.php
index d112dc9..4971548 100644
--- a/examples/curl_display_curl_option_values.php
+++ b/examples/curl_display_curl_option_values.php
@@ -21,7 +21,7 @@ foreach ($curl->getOptions() as $option => $value) {
 // CURLOPT_REDIR_PROTOCOLS: 3 (CURLPROTO_HTTP | CURLPROTO_HTTPS)
 //
 // option 10018:
-// CURLOPT_USERAGENT: some agent
+// CURLOPT_USERAGENT: "some agent"
 //
 // option 13:
 // CURLOPT_TIMEOUT: 60
diff --git a/examples/deviant_art_rss.php b/examples/deviant_art_rss.php
index 5888842..dcf9df9 100644
--- a/examples/deviant_art_rss.php
+++ b/examples/deviant_art_rss.php
@@ -5,7 +5,7 @@ require __DIR__ . '/../vendor/autoload.php';
 use Curl\Curl;
 
 $curl = new Curl();
-$curl->get('http://backend.deviantart.com/rss.xml', [
+$curl->get('https://backend.deviantart.com/rss.xml', [
     'q' => 'boost:popular in:photography/people/fashion',
     'type' => 'deviation',
 ]);
diff --git a/examples/flickr_photo_search.php b/examples/flickr_photo_search.php
index 04dc503..649893b 100644
--- a/examples/flickr_photo_search.php
+++ b/examples/flickr_photo_search.php
@@ -22,7 +22,7 @@ $curl->get('https://api.flickr.com/services/rest/', $data);
 foreach ($curl->response->photos->photo as $photo) {
     $size = 's';
     $ext = 'jpg';
-    $url = 'http://farm' . $photo->farm . '.staticflickr.com/' .  $photo->server . '/' .
+    $url = 'https://farm' . $photo->farm . '.staticflickr.com/' .  $photo->server . '/' .
         $photo->id . '_' . $photo->secret . '_' . $size . '.' . $ext;
     echo '<img alt="" src="' . $url . '" height="75" width="75" />';
 }
diff --git a/examples/flickr_upload_photo.php b/examples/flickr_upload_photo.php
index 543a591..aaa0cda 100644
--- a/examples/flickr_upload_photo.php
+++ b/examples/flickr_upload_photo.php
@@ -23,7 +23,7 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST') {
     } else {
         $user_id = $_SESSION['user_id'];
         $photo_id = $result->response->photoid;
-        $photo_url = 'http://www.flickr.com/photos/' . $user_id . '/' . $photo_id;
+        $photo_url = 'https://www.flickr.com/photos/' . $user_id . '/' . $photo_id;
         echo '<p>Photo uploaded successfully. <a href="' . $photo_url . '">View photo</a>.</p>';
     }
 }