diff --git a/pkgs/applications/science/astronomy/calcmysky/default.nix b/pkgs/applications/science/astronomy/calcmysky/default.nix
index bff3f39e8975..331b1639eb48 100644
--- a/pkgs/applications/science/astronomy/calcmysky/default.nix
+++ b/pkgs/applications/science/astronomy/calcmysky/default.nix
@@ -10,13 +10,13 @@
 
 stdenv.mkDerivation rec {
   pname = "calcmysky";
-  version = "0.3.0";
+  version = "0.3.1";
 
   src = fetchFromGitHub {
     owner = "10110111";
     repo = "CalcMySky";
     rev = "refs/tags/v${version}";
-    hash = "sha256-QVKyPyod0pxoFge/GAcle9AWXPCLR/seBVWRfs9I9tE=";
+    hash = "sha256-oqYOXoIPVqCD3HL7ShNoF89W725hFHX0Ei/yVJNTS5I=";
   };
 
   nativeBuildInputs = [ cmake wrapQtAppsHook ];