diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,10 @@
+
+Version 0.6.1
+-----
+
+* Fixed the copyright years.
+
+Version 0.6
+-----
+
+* Improved the speed of simulation.
diff --git a/LICENSE b/LICENSE
--- a/LICENSE
+++ b/LICENSE
@@ -1,4 +1,4 @@
-Copyright (c) 2018 David Sorokin <david.sorokin@gmail.com>
+Copyright (c) 2017-2018 David Sorokin <david.sorokin@gmail.com>
 
 All rights reserved.
 
diff --git a/aivika-gpss.cabal b/aivika-gpss.cabal
--- a/aivika-gpss.cabal
+++ b/aivika-gpss.cabal
@@ -1,5 +1,5 @@
 name:            aivika-gpss
-version:         0.6
+version:         0.6.1
 synopsis:        GPSS-like DSL for Aivika
 description:
     This package allows defining simulation models in terms of a GPSS-like
@@ -40,7 +40,7 @@
 category:        Simulation
 license:         BSD3
 license-file:    LICENSE
-copyright:       (c) 2018. David Sorokin <david.sorokin@gmail.com>
+copyright:       (c) 2017-2018. David Sorokin <david.sorokin@gmail.com>
 author:          David Sorokin
 maintainer:      David Sorokin <david.sorokin@gmail.com>
 homepage:        http://www.aivikasoft.com
@@ -67,6 +67,7 @@
                      examples/Example7-31Trans.hs
                      examples/Example7-35.hs
                      examples/Example7-35Trans.hs
+                     CHANGELOG.md
 
 library
 
