diff --git a/pkgs/by-name/ld/ldns/package.nix b/pkgs/by-name/ld/ldns/package.nix
index c5887ea25771..4078cdfd5372 100644
--- a/pkgs/by-name/ld/ldns/package.nix
+++ b/pkgs/by-name/ld/ldns/package.nix
@@ -11,11 +11,11 @@
 
 stdenv.mkDerivation (finalAttrs: {
   pname = "ldns";
-  version = "1.8.4";
+  version = "1.9.0";
 
   src = fetchurl {
     url = "https://www.nlnetlabs.nl/downloads/ldns/ldns-${finalAttrs.version}.tar.gz";
-    sha256 = "sha256-g4uQdZS6r/HNdn6VRmp3RZmK5kvHS+A43Mxi4t4uQkc=";
+    sha256 = "sha256-q67tKFj76oSk65gz4Z59IzgMwPPZtlSLlivkInb/3LM=";
   };
 
   postPatch = ''