diff --git a/android/app/src/main/java/io/v/android/apps/reader/db/SyncbaseDB.java b/android/app/src/main/java/io/v/android/apps/reader/db/SyncbaseDB.java
index 38628a6..4ae25c3 100644
--- a/android/app/src/main/java/io/v/android/apps/reader/db/SyncbaseDB.java
+++ b/android/app/src/main/java/io/v/android/apps/reader/db/SyncbaseDB.java
@@ -414,7 +414,7 @@
         for (List<VCertificate> chain : blessings.getCertificateChains()) {
             for (VCertificate certificate : Lists.reverse(chain)) {
                 if (certificate.getExtension().contains("@")) {
-                    return certificate.getExtension();
+                    return certificate.getExtension().replace(':', '/');
                 }
             }
         }