diff --git a/pkgs/applications/science/logic/proverif/default.nix b/pkgs/applications/science/logic/proverif/default.nix
index 8726f5affea7..6fe45e653dc5 100644
--- a/pkgs/applications/science/logic/proverif/default.nix
+++ b/pkgs/applications/science/logic/proverif/default.nix
@@ -2,11 +2,11 @@
 
 stdenv.mkDerivation rec {
   name = "proverif-${version}";
-  version = "1.95";
+  version = "1.97pl1";
 
   src = fetchurl {
     url    = "http://prosecco.gforge.inria.fr/personal/bblanche/proverif/proverif${version}.tar.gz";
-    sha256 = "01viwi6sccdxk723ycy1shklz8g29j5i3wj2mcwb3j7advvqmws2";
+    sha256 = "1b0ji68crdli40a4z62gdq6fnygj3z2j63iaq4jki7wfc3nn3vgq";
   };
 
   buildInputs = [ ocaml ];