diff --git a/mail-server/postfix.nix b/mail-server/postfix.nix
index 0c52d7c..1a5d1f9 100644
--- a/mail-server/postfix.nix
+++ b/mail-server/postfix.nix
@@ -317,9 +317,6 @@ in
         smtp_tls_loglevel = "1";
         smtpd_tls_loglevel = "1";
 
-        # Configure a non blocking source of randomness
-        tls_random_source = "dev:/dev/urandom";
-
         smtpd_milters = smtpdMilters;
         non_smtpd_milters = lib.mkIf cfg.dkimSigning [ "unix:/run/rspamd/rspamd-milter.sock" ];
         milter_protocol = "6";