diff --git a/.bumpversion.cfg b/.bumpversion.cfg
index 22f9dfa89..67d1d0e11 100644
--- a/.bumpversion.cfg
+++ b/.bumpversion.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 0.3.0
+current_version = 0.4.0
 commit = True
 tag = True
 tag_name = {new_version}
diff --git a/src/pyodide.py b/src/pyodide.py
index 37a4f4661..e2417015c 100644
--- a/src/pyodide.py
+++ b/src/pyodide.py
@@ -6,7 +6,7 @@ import ast
 import io
 from textwrap import dedent
 
-__version__ = '0.3.0'
+__version__ = '0.4.0'
 
 
 def open_url(url):