diff --git a/jams-server/src/main/java/net/jami/jams/server/update/UpdateCheckTask.java b/jams-server/src/main/java/net/jami/jams/server/update/UpdateCheckTask.java
index 6fc231ebc4db6bc04db434c53206707d4fdb9772..89ac515b1c1ee9d912e6f8c4ba57263bf9f17eee 100644
--- a/jams-server/src/main/java/net/jami/jams/server/update/UpdateCheckTask.java
+++ b/jams-server/src/main/java/net/jami/jams/server/update/UpdateCheckTask.java
@@ -63,6 +63,11 @@ public class UpdateCheckTask extends TimerTask {
             trustStore = KeyStore.getInstance(KeyStore.getDefaultType());
             trustStore.load(null, null);
             trustStore.setCertificateEntry("ca",certificate);
+
+            is = UpdateCheckTask.class.getClassLoader().getResourceAsStream("oem/update.crt");
+            certificate = X509Utils.getCertificateFromPEMString(new String(is.readAllBytes()));
+            trustStore.setCertificateEntry("update",certificate);
+
             //Inject the SSL Connection here for a first time.
             sslContext = SSLContexts.custom().loadTrustMaterial(trustStore, null).build();
 
diff --git a/jams-server/src/main/java/net/jami/jams/server/update/UpdateDownloader.java b/jams-server/src/main/java/net/jami/jams/server/update/UpdateDownloader.java
index ff39a2cec81fff2ee24682ba075e28db025de356..c4ae6ce6b95c2b2da033e92a0c41b883af0cd116 100644
--- a/jams-server/src/main/java/net/jami/jams/server/update/UpdateDownloader.java
+++ b/jams-server/src/main/java/net/jami/jams/server/update/UpdateDownloader.java
@@ -63,6 +63,10 @@ public class UpdateDownloader {
             trustStore = KeyStore.getInstance(KeyStore.getDefaultType());
             trustStore.load(null, null);
             trustStore.setCertificateEntry("ca", certificate);
+
+            is = UpdateDownloader.class.getClassLoader().getResourceAsStream("oem/update.crt");
+            certificate = X509Utils.getCertificateFromPEMString(new String(is.readAllBytes()));
+            trustStore.setCertificateEntry("update",certificate);
         }
         catch (Exception e){
             log.info("Could not load SFL's CA - this should not happen! detailed error: {}",e.getMessage());
diff --git a/jams-server/src/main/resources/oem/update.crt b/jams-server/src/main/resources/oem/update.crt
new file mode 100644
index 0000000000000000000000000000000000000000..88ff041eda1a46b9ed3273e2114354631ba2774a
--- /dev/null
+++ b/jams-server/src/main/resources/oem/update.crt
@@ -0,0 +1,35 @@
+-----BEGIN CERTIFICATE-----
+MIIGITCCBAmgAwIBAgIBAzANBgkqhkiG9w0BAQsFADCBmzELMAkGA1UEBhMCQ0Ex
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++X48SNwklA4xpo9KFidWTSaIMVxQPdS6Pz5zRZnM71FIqUwU5urbAuQLBDZHDB88
+tqnA/uvlJ8qdv8xI0IHd8lS8KpGrBA6/tIfLOiS/vlODqxkCibhAqrv9+T2hSzQN
+mWy+FO8QEY7mIJGqEV8MZxuWtbFo6Xqkb/W4cK7U/Ygfr9S48wgmZsMejXo3El3l
+qJwvra3a+kN17o+0czZ4QarNYzGoTz44/Ws28tRKfzkd5F9CCT0dLWTSF/TcitK4
+axBNXmO24XT5iFiVuaR6YUgMaEPNXj7AcM5Ylyy4jYCpSl5CWbDc0AfkEwWy5o/5
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+RZ9f6/5QPW/Un1zGxGO8sdWgoto6kpfevFHJfhWFyuUtm1bZjQ==
+-----END CERTIFICATE-----
\ No newline at end of file