diff --git a/pkgs/tools/networking/unbound/default.nix b/pkgs/tools/networking/unbound/default.nix
index 4da6f6e177b..0c7acaad49f 100644
--- a/pkgs/tools/networking/unbound/default.nix
+++ b/pkgs/tools/networking/unbound/default.nix
@@ -2,11 +2,11 @@
 
 stdenv.mkDerivation rec {
   name = "unbound-${version}";
-  version = "1.8.1";
+  version = "1.8.3";
 
   src = fetchurl {
     url = "https://unbound.net/downloads/${name}.tar.gz";
-    sha256 = "0p9w6spar5dfi7fplxjcq4394wldabaws0ns30cqq6sxqfwv6qn3";
+    sha256 = "1k6fljr7k721vg2ivn5dfr0hs1kn8p1sm003glgd9ypd261jns9b";
   };
 
   outputs = [ "out" "lib" "man" ]; # "dev" would only split ~20 kB