diff --git a/6-InRealEnvironment/6-Tools.ipynb b/6-InRealEnvironment/6-Tools.ipynb
index c2ac9846ac38a124684a8264064c942199b36e80..7913d0700ea5e0742a96e2813514d8647e3bd184 100644
--- a/6-InRealEnvironment/6-Tools.ipynb
+++ b/6-InRealEnvironment/6-Tools.ipynb
@@ -31,7 +31,7 @@
     "\n",
     "## Online compilers\n",
     "\n",
-    "This ~~[blog post](https://arne-mertz.de/2017/05/online-compilers/)~~ [GitHub page](https://arnemertz.github.io/online-compilers/) gives several such online compilers we mentioned several times in this tutorial.\n",
+    "This ~~[blog post](https://arne-mertz.de/2017/05/online-compilers/)~~ [GitHub page](https://arnemertz.github.io/online-compilers/) gives a list of online compilers we mentioned several times in this tutorial.\n",
     "\n",
     "I have used only [Coliru](http://coliru.stacked-crooked.com/) which provides an API to incorporate directly some interactive code in a Web page (disclaimer - I have not used that feature yet) and [Wandbox](http://melpon.org/wandbox) which may be useful in day-to-day work as you may try a snippet of code with many configurations. It's useful for instance when you intend to use a bleeding-edge feature to see which version of compilers support it or not.\n",
     "\n",