diff --git a/README.md b/README.md
--- a/README.md
+++ b/README.md
@@ -78,16 +78,15 @@
 Run `nerf train --help` to learn more about the program arguments and possible
 training options.
 
-**WARNING**: The `-N` runtime option currently leads to errors in the training
-process and therefore should be not used for the time being.
-
-<!---
 The nerf tool can be also supplied with additional 
 [runtime system options](http://www.haskell.org/ghc/docs/latest/html/users_guide/runtime-control.html).
 For example, to train the model using four threads, use:
 
     nerf train train.nes -e eval.nes -o model.bin +RTS -N4
--->
+
+**WARNING**: Currently, the `-N` runtime option sometimes leads to errors in
+the training process and therefore should be avoided for the time being.
+
 
 Dictionaries
 ------------
diff --git a/nerf.cabal b/nerf.cabal
--- a/nerf.cabal
+++ b/nerf.cabal
@@ -4,10 +4,10 @@
 --
 -- see: https://github.com/sol/hpack
 --
--- hash: ad5f136e7ed38e4e292f8ffc7c67171e2a4bc994ea6c43fb33ec1babf6894a9d
+-- hash: 91131ded42d445cdc80596c4a3ca791994e35dbdeb4f3378d61cee17d7a0182e
 
 name:           nerf
-version:        0.5.4
+version:        0.5.4.1
 synopsis:       Nerf, a named entity recognition tool based on linear-chain CRFs
 description:    Please see the README on GitHub at <https://github.com/kawu/nerf#readme>
 category:       Natural Language Processing