diff --git a/pkgs/applications/science/logic/yices/default.nix b/pkgs/applications/science/logic/yices/default.nix
index f495ee257ff0..d892a9abb2e2 100644
--- a/pkgs/applications/science/logic/yices/default.nix
+++ b/pkgs/applications/science/logic/yices/default.nix
@@ -2,12 +2,12 @@
 
 stdenv.mkDerivation rec {
   name    = "yices-${version}";
-  version = "2.3.1";
+  version = "2.5.1";
 
   src = fetchurl {
-    url = "http://yices.csl.sri.com/cgi-bin/yices2-newnewdownload.cgi?file=yices-2.3.1-src.tar.gz&accept=I+Agree";
+    url = "http://yices.csl.sri.com/cgi-bin/yices2-newnewdownload.cgi?file=yices-${version}-src.tar.gz&accept=I+Agree";
     name = "yices-${version}-src.tar.gz";
-    sha256 = "1da70n0cah0dh3pk7fcrvjkszx9qmhc0csgl15jqa7bdh707k2zs";
+    sha256 = "1wfq6hcm54h0mqmbs1ip63i0ywlwnciav86sbzk3gafxyzg1nd0c";
   };
 
   configureFlags = [ "--with-static-gmp=${gmp-static.out}/lib/libgmp.a"