diff --git a/CHANGES.md b/CHANGES.md
index 373c750c..3905c66c 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,5 +1,15 @@
 # Version history of the RCWA package
 
+## Changes between RCWA 4.6.3 and RCWA 4.6.4 (March 24, 2019):
+
+ - Clarified that this package is licensed under GPL 2 or later.
+ - Moved package homepage to <https://gap-packages.github.io/rcwa>.
+ - Fixed some issues where loading ResClasses could inadvertently alter
+   the behavior of GAP library functions.
+ - Increased minimal required resclasses version to 4.7.2.
+ - Improved compatibility with future GAP releases (4.11 and later).
+ - Other minor adjustments.
+
 ## Changes between RCWA 4.6.2 and RCWA 4.6.3 (November 27, 2018):
 
  - An operation `CTCSCRSplit' has been added.
diff --git a/PackageInfo.g b/PackageInfo.g
index 4c6e795f..4e133e16 100644
--- a/PackageInfo.g
+++ b/PackageInfo.g
@@ -8,8 +8,8 @@ SetPackageInfo( rec(
 
 PackageName      := "RCWA",
 Subtitle         := "Residue-Class-Wise Affine Groups",
-Version          := "4.6.3dev",
-Date             := "05/02/2019", # dd/mm/yyyy format
+Version          := "4.6.4",
+Date             := "24/03/2019", # dd/mm/yyyy format
 License          := "GPL-2.0-or-later",
 Persons          := [
                       rec( LastName      := "Kohl",
@@ -53,7 +53,7 @@ PackageDoc       := rec(
                        ),
 Dependencies     := rec(
                          GAP                    := ">=4.9.1",
-                         NeededOtherPackages    := [ ["ResClasses",">=4.7.0"], ["GRAPE",">=4.7"],
+                         NeededOtherPackages    := [ ["ResClasses",">=4.7.2"], ["GRAPE",">=4.7"],
                                                      ["Polycyclic",">=2.11"], ["FR",">=2.2.1"],
                                                      ["GAPDoc",">=1.5.1"], ["Utils",">=0.40"] ],
                          SuggestedOtherPackages := [ ],
diff --git a/README.md b/README.md
index 4c12e403..7909c623 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@
 
 ## A GAP 4 Package
 
-### Version 4.6.3
+### Version 4.6.4
 
 Author and Maintainer:  Stefan Kohl, stefan@mcs.st-and.ac.uk