diff --git a/pkgs/development/libraries/java/jflex/default.nix b/pkgs/development/libraries/java/jflex/default.nix
index 744419dcd53..5eb7ef6c076 100644
--- a/pkgs/development/libraries/java/jflex/default.nix
+++ b/pkgs/development/libraries/java/jflex/default.nix
@@ -1,11 +1,11 @@
 {stdenv, fetchurl, jre} :
 
 stdenv.mkDerivation rec {
-  name = "jflex-1.7.0";
+  name = "jflex-1.8.1";
 
   src = fetchurl {
     url = "http://jflex.de/release/${name}.tar.gz";
-    sha256 = "1k7bqw1mn569g9dxc0ia3yz1bzgzs5w52lh1xn3hgj7k5ymh54kk";
+    sha256 = "0hspw4z1i7wc1dnnyh4xx6ka7891nsw4hc66bf45510gjks6779x";
   };
 
   sourceRoot = name;
@@ -29,7 +29,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = {
-    homepage = https://www.jflex.de/;
+    homepage = "https://www.jflex.de/";
     description = "Lexical analyzer generator for Java, written in Java";
     license = stdenv.lib.licenses.bsd3;
     platforms = stdenv.lib.platforms.unix;