diff --git a/pkgs/tools/misc/kalker/default.nix b/pkgs/tools/misc/kalker/default.nix
index b4a84adb457f..8e976bb063ef 100644
--- a/pkgs/tools/misc/kalker/default.nix
+++ b/pkgs/tools/misc/kalker/default.nix
@@ -6,16 +6,16 @@
 }:
 rustPlatform.buildRustPackage rec {
   pname = "kalker";
-  version = "1.1.0";
+  version = "2.0.0";
 
   src = fetchFromGitHub {
     owner = "PaddiM8";
     repo = pname;
     rev = "v${version}";
-    sha256 = "sha256-NnX4+VmV4oZg/8Z3ZCWHGZ6dqDfvH30XErnrvKMxyls=";
+    sha256 = "sha256-D7FlX72fcbeVtQ/OtK2Y3P1hZ5Bmowa04up5rTTXDDU=";
   };
 
-  cargoSha256 = "sha256-nSLbe3EhcLYylvyzOWuLIehBnD6mMofsNpFQVEybV8k=";
+  cargoSha256 = "sha256-r20kQG6YeNGGb7ovYaAx+4DGijZSmf5YoIYh3z5zOpk=";
 
   buildInputs = [ gmp mpfr libmpc ];