diff --git a/app/src/main/java/eu/faircode/email/Helper.java b/app/src/main/java/eu/faircode/email/Helper.java
index 82efb93256..4b5cae5e91 100644
--- a/app/src/main/java/eu/faircode/email/Helper.java
+++ b/app/src/main/java/eu/faircode/email/Helper.java
@@ -225,7 +225,7 @@ public class Helper {
     static final String DONTKILL_URI = "https://dontkillmyapp.com/";
     static final String URI_SUPPORT_RESET_OPEN = "https://support.google.com/pixelphone/answer/6271667";
     static final String URI_SUPPORT_CONTACT_GROUP = "https://support.google.com/contacts/answer/30970";
-    static final String URI_CERT_TRANSPARENCY = "https://github.com/appmattus/certificatetransparency/blob/main/docs/what-is-certificate-transparency.md";
+    static final String URI_CERT_TRANSPARENCY = "https://en.wikipedia.org/wiki/Certificate_Transparency";
 
     // https://developer.android.com/distribute/marketing-tools/linking-to-google-play#PerformingSearch
     private static final String PLAY_STORE_SEARCH = "https://play.google.com/store/search";