--- a/doc/introduction.rst	Sat May 04 14:23:09 2019 +0200
+++ b/doc/introduction.rst	Sun May 05 11:36:12 2019 +0200
@@ -22,7 +22,8 @@
 YAML Files
 ----------
 
-Need the :mod:`yaml` package (e.g. ``pip install pyyaml``)
+Need the :mod:`yaml` package (https://github.com/yaml/pyyaml)
+(e.g. ``pip install pyyaml``)
 
 .. note:: All strings are returned as Unicode text strings.
 
@@ -110,7 +111,8 @@
 TOML Files
 ----------
 
-Read the TOML file with the help of the pure Python `uiri/toml` package.
+Read the TOML file with the help of the pure Python :mod:`toml`
+package (https://github.com/uiri/toml) (e.g. ``pip install toml``).
 
 All TOML features map seamingless to "ConfigMix".