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-rw-r--r--README1
1 files changed, 1 insertions, 0 deletions
diff --git a/README b/README
index 3dd365e1f..756219981 100644
--- a/README
+++ b/README
@@ -146,6 +146,7 @@ Your PHP installation must include the following PHP extensions:
- GD. For scaling down avatar images.
- mbstring. For handling Unicode (UTF-8) encoded strings.
- gettext. For multiple languages. Default on many PHP installs.
+- tidy. Used to clean up HTML/URLs for the URL shortener to consume.
For some functionality, you will also need the following extensions: