diff --git a/pkgs/by-name/la/lagrange/package.nix b/pkgs/by-name/la/lagrange/package.nix
index f56ff83240a1..60e31c55bd45 100644
--- a/pkgs/by-name/la/lagrange/package.nix
+++ b/pkgs/by-name/la/lagrange/package.nix
@@ -22,13 +22,13 @@
 
 stdenv.mkDerivation (finalAttrs: {
   pname = "lagrange";
-  version = "1.20.5";
+  version = "1.20.6";
 
   src = fetchFromGitHub {
     owner = "skyjake";
     repo = "lagrange";
     tag = "v${finalAttrs.version}";
-    hash = "sha256-U6SrUmTn43IleeVCLkh9NONyWtUe2Oja3e6VmYKOHvQ=";
+    hash = "sha256-ZKxRcZt5JAO9AOveqXaoqqseZbRguqetdoAKe8c8Il0=";
   };
 
   nativeBuildInputs = [