diff --git a/.bumpversion.cfg b/.bumpversion.cfg
index cb975ac..94f244f 100644
--- a/.bumpversion.cfg
+++ b/.bumpversion.cfg
@@ -2,7 +2,7 @@
 commit = True
 tag = True
 tag_name = {new_version}
-current_version = 0.3.7
+current_version = 0.4.0
 
 [bumpversion:file:pyproject.toml]
 search = version = "{current_version}"  # DO NOT EDIT THIS LINE MANUALLY. LET bump2version UTILITY DO IT
diff --git a/pyproject.toml b/pyproject.toml
index 406b5cf..cccfa5e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -5,7 +5,7 @@ build-backend = "flit_core.buildapi"
 
 [project]
 name = "mdformat-gfm"
-version = "0.3.7"  # DO NOT EDIT THIS LINE MANUALLY. LET bump2version UTILITY DO IT
+version = "0.4.0"  # DO NOT EDIT THIS LINE MANUALLY. LET bump2version UTILITY DO IT
 authors = [
     { name = "Taneli Hukkinen", email = "hukkin@users.noreply.github.com"},
 ]
diff --git a/src/mdformat_gfm/__init__.py b/src/mdformat_gfm/__init__.py
index 3efac97..71c738b 100644
--- a/src/mdformat_gfm/__init__.py
+++ b/src/mdformat_gfm/__init__.py
@@ -1 +1 @@
-__version__ = "0.3.7"  # DO NOT EDIT THIS LINE MANUALLY. LET bump2version UTILITY DO IT
+__version__ = "0.4.0"  # DO NOT EDIT THIS LINE MANUALLY. LET bump2version UTILITY DO IT