1 files changed, 1 insertions, 0 deletions

diff --git a/README b/README
index 2cde08c37e..7d06e04800 100644
--- a/README
+++ b/README
@@ -154,6 +154,7 @@ REQUIREMENTS:
         libmicrohttpd (optional)
         libpython (optional)
         libidn2 or libidn (optional)
+        gnutls >= 3.1.4 (optional, >= 3.5.3 is necessary to support DNS-over-TLS)
         elfutils >= 158 (optional)
         polkit (optional)
         pkg-config