diff --git a/README.md b/README.md
index 50dc6fc..4e72037 100644
--- a/README.md
+++ b/README.md
@@ -75,6 +75,15 @@ A certain amount of (domain- or business-specific) analysis is necessary to crea
             A feed of known, active and non-sinkholed C&C IP addresses, from Bambenek Consulting.
         </td>
     </tr>
+    <tr>
+        <td>
+
+            <a href="https://certstream.calidog.io/" target="_blank">CertStream</a>
+        </td>
+        <td>
+            Real-time certificate transparency log update stream. See SSL certificates as they're issued in real time.
+        </td>
+    </tr>
     <tr>
         <td>
             <a href="http://www.ccssforum.org/malware-certificates.php" target="_blank">CCSS Forum Malware Certificates</a>