diff --git a/pkgs/by-name/ad/addwater/package.nix b/pkgs/by-name/ad/addwater/package.nix
index 2378d063ad24..c3a8541e6894 100644
--- a/pkgs/by-name/ad/addwater/package.nix
+++ b/pkgs/by-name/ad/addwater/package.nix
@@ -15,7 +15,7 @@
 
 python3Packages.buildPythonApplication (finalAttrs: {
   pname = "addwater";
-  version = "1.2.7";
+  version = "1.2.9";
   # built with meson, not a python format
   pyproject = false;
 
@@ -23,7 +23,7 @@ python3Packages.buildPythonApplication (finalAttrs: {
     owner = "largestgithubuseronearth";
     repo = "addwater";
     tag = "v${finalAttrs.version}";
-    hash = "sha256-NZOjY+cskKn+BppqBSJyFR1JdDL56whDW19a15cvShE=";
+    hash = "sha256-ii6xzt4BFroLAf4fHK0GbXa/aSzKffiN2FjMju+tnRo=";
   };
 
   buildInputs = [