diff --git a/pkgs/development/tools/parsing/re-flex/default.nix b/pkgs/development/tools/parsing/re-flex/default.nix
index 3b2a8a3aa8c6..6f19a488649d 100644
--- a/pkgs/development/tools/parsing/re-flex/default.nix
+++ b/pkgs/development/tools/parsing/re-flex/default.nix
@@ -9,13 +9,13 @@
 
 stdenv.mkDerivation rec {
   pname = "re-flex";
-  version = "3.3.6";
+  version = "3.3.7";
 
   src = fetchFromGitHub {
     owner = "Genivia";
     repo = "RE-flex";
     rev = "v${version}";
-    sha256 = "sha256-SFcb3lfvhR9BbpwM79pBs3cwKPR9KakEMcI/Thm1plo=";
+    sha256 = "sha256-YLWMVsfmb1cSYWtxCkTkANYRiUenkNZ7n2QFEI6SU1A=";
   };
 
   nativeBuildInputs = [ boost autoconf automake ];