diff --git a/pkgs/tools/networking/subnetcalc/default.nix b/pkgs/tools/networking/subnetcalc/default.nix
index db8c983be09..8b0c987059e 100644
--- a/pkgs/tools/networking/subnetcalc/default.nix
+++ b/pkgs/tools/networking/subnetcalc/default.nix
@@ -2,13 +2,13 @@
 
 stdenv.mkDerivation rec {
   pname = "subnetcalc";
-  version = "2.4.19";
+  version = "2.4.20";
 
   src = fetchFromGitHub {
     owner = "dreibh";
     repo = pname;
     rev = "${pname}-${version}";
-    sha256 = "sha256-70OHHcdCsZBa95KQEEYhs6LfpjPg+ULOB+A+VrQVltU=";
+    sha256 = "sha256-ZKEcDLwZPPgbaSx+LvTHNWcdYR/mZEGLc9b0Fb+CyEE=";
   };
 
   nativeBuildInputs = [ cmake ninja ];