diff --git a/pkgs/by-name/re/re-flex/package.nix b/pkgs/by-name/re/re-flex/package.nix
index 19f4ce49d5f6..d4518b48a1b9 100644
--- a/pkgs/by-name/re/re-flex/package.nix
+++ b/pkgs/by-name/re/re-flex/package.nix
@@ -7,13 +7,13 @@
 
 stdenv.mkDerivation rec {
   pname = "re-flex";
-  version = "5.5.0";
+  version = "6.0.0";
 
   src = fetchFromGitHub {
     owner = "Genivia";
     repo = "RE-flex";
     rev = "v${version}";
-    hash = "sha256-BTzKR9C4J9DOszKGtcd+7Tiw+OkohPJuKKjbXZ8wX7k=";
+    hash = "sha256-p04o2e7Dxx7N6ByCwERz4hKz+vfTIuuZ//AoWSC1qao=";
   };
 
   outputs = [