Prepare for 0.5

Change-Id: I67ed557f994bd0ec91962deb9b50f1d348311795
diff --git a/Changelog.md b/Changelog.md
index b63dc95..0725e1b 100644
--- a/Changelog.md
+++ b/Changelog.md
@@ -1,4 +1,5 @@
 # Changelog
+## 0.4.900
 
 ## 0.4.0
 * change default palette back to adapted D3 to avoid misunderstandings
diff --git a/DESCRIPTION b/DESCRIPTION
index 71ccfe6..d9d5b65 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,7 +1,7 @@
 Package: idsThemeR
 Type: Package
 Title: Plot themes for the Leibniz Institute for the German Language (IDS)
-Version: 0.4.0
+Version: 0.4.900
 Authors@R:
     c(person(given = "Marc",
              family = "Kupietz",