diff --git a/README.md b/README.md
index d1c82e6..1b4243c 100644
--- a/README.md
+++ b/README.md
@@ -60,5 +60,5 @@ optional arguments:
                         IZK_INPUT_MODE environment variable.
   --version             Display izk version number and exit
 
-Version: 0.3.1
+Version: 0.4.0
 ```
diff --git a/izk/__init__.py b/izk/__init__.py
index e1424ed..abeeedb 100644
--- a/izk/__init__.py
+++ b/izk/__init__.py
@@ -1 +1 @@
-__version__ = '0.3.1'
+__version__ = '0.4.0'