diff --git a/pkgs/applications/science/logic/yices/default.nix b/pkgs/applications/science/logic/yices/default.nix
index c81d5a9ca618..fb14723241b8 100644
--- a/pkgs/applications/science/logic/yices/default.nix
+++ b/pkgs/applications/science/logic/yices/default.nix
@@ -3,13 +3,13 @@
 stdenv.mkDerivation rec {
   pname = "yices";
   # We never want X.Y.${odd} versions as they are moving development tags.
-  version = "2.6.2";
+  version = "2.6.4";
 
   src = fetchFromGitHub {
     owner  = "SRI-CSL";
     repo   = "yices2";
     rev    = "Yices-${version}";
-    sha256 = "1jx3854zxvfhxrdshbipxfgyq1yxb9ll9agjc2n0cj4vxkjyh9mn";
+    sha256 = "sha256-qdxh86CkKdm65oHcRgaafTG9GUOoIgTDjeWmRofIpNE=";
   };
 
   patches = [