diff --git a/pkgs/applications/science/logic/poly/default.nix b/pkgs/applications/science/logic/poly/default.nix
index 15e89138c6b3..d0344a3737da 100644
--- a/pkgs/applications/science/logic/poly/default.nix
+++ b/pkgs/applications/science/logic/poly/default.nix
@@ -2,14 +2,14 @@
 
 stdenv.mkDerivation rec {
   pname = "libpoly";
-  version = "0.1.8";
+  version = "0.1.9";
 
   src = fetchFromGitHub {
     owner = "SRI-CSL";
     repo = "libpoly";
     # they've pushed to the release branch, use explicit tag
     rev = "refs/tags/v${version}";
-    sha256 = "1n3gijksnl2ybznq4lkwm2428f82423sxq18gnb2g1kiwqlzdaa3";
+    sha256 = "sha256-E2lHo8Bt4ujoGQ623fjkQbqRnDYJYilXdRt4lnF4wJk=";
   };
 
   nativeBuildInputs = [ cmake ];