diff --git a/CHANGES.rst b/CHANGES.rst
index d92cc588b..e389a04bc 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -2,7 +2,7 @@
 Changelog (Pillow)
 ==================
 
-5.5.0 (unreleased)
+6.0.0 (unreleased)
 ------------------
 
 - Updated libwebp to 1.0.2 #3602
diff --git a/docs/installation.rst b/docs/installation.rst
index c100fe312..abccfcf56 100644
--- a/docs/installation.rst
+++ b/docs/installation.rst
@@ -26,7 +26,7 @@ Notes
 +--------------------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+
 |Pillow 5.0.x - 5.1.x|       |       |       |  Yes  |       |       |  Yes  |  Yes  |  Yes  |       |
 +--------------------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+
-|Pillow 5.2.x - 5.5.x|       |       |       |  Yes  |       |       |  Yes  |  Yes  |  Yes  |  Yes  |
+|Pillow 5.2.x - 5.4.x|       |       |       |  Yes  |       |       |  Yes  |  Yes  |  Yes  |  Yes  |
 +--------------------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+
 |Pillow >= 6.0.0     |       |       |       |  Yes  |       |       |       |  Yes  |  Yes  |  Yes  |
 +--------------------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+
diff --git a/src/PIL/_version.py b/src/PIL/_version.py
index 2835370a2..0b0d90e80 100644
--- a/src/PIL/_version.py
+++ b/src/PIL/_version.py
@@ -1,2 +1,2 @@
 # Master version for Pillow
-__version__ = '5.5.0.dev0'
+__version__ = '6.0.0.dev0'