diff --git a/docs/HISTORY.txt b/docs/HISTORY.txt
index b450300..58a784f 100644
--- a/docs/HISTORY.txt
+++ b/docs/HISTORY.txt
@@ -1,6 +1,9 @@
 Changelog
 =========
 
+7.5-dev - (unreleased)
+----------------------
+
 7.4 - (2013-05-20)
 ------------------
 * Bug fix: Added CSV UnicodeWriter as by default python csv module doesn't
diff --git a/eea/app/visualization/version.txt b/eea/app/visualization/version.txt
index 9904c66..e440846 100644
--- a/eea/app/visualization/version.txt
+++ b/eea/app/visualization/version.txt
@@ -1 +1 @@
-7.4
\ No newline at end of file
+7.5-dev
\ No newline at end of file