diff --git a/docs/installation.rst b/docs/installation.rst
index 76266b76d..2e2056289 100644
--- a/docs/installation.rst
+++ b/docs/installation.rst
@@ -66,13 +66,14 @@ Many of Pillow's features require external libraries:
 * **libwebp** provides the Webp format.
 
   * Pillow has been tested with version **0.1.3**, which does not read
-    transparent webp files. Version **0.3.0** supports transparency.
+    transparent webp files. Versions **0.3.0** and **0.4.0** support
+    transparency. 
 
 * **tcl/tk** provides support for tkinter bitmap and photo images. 
 
 * **openjpeg** provides JPEG 2000 functionality. 
 
-  * Pillow 2.4 requires openjpeg 2.0.0.
+  * Pillow has been tested with openjpeg **2.0.0**.
 
 If the prerequisites are installed in the standard library locations for your
 machine (e.g. :file:`/usr` or :file:`/usr/local`), no additional configuration