diff --git a/.bumpversion.cfg b/.bumpversion.cfg
index 4826371..16830f3 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 = v{new_version}
diff --git a/genotype_api/__init__.py b/genotype_api/__init__.py
index 493f741..6a9beea 100644
--- a/genotype_api/__init__.py
+++ b/genotype_api/__init__.py
@@ -1 +1 @@
-__version__ = "0.3.0"
+__version__ = "0.4.0"
diff --git a/setup.py b/setup.py
index ef2b275..c11b5f2 100644
--- a/setup.py
+++ b/setup.py
@@ -13,7 +13,7 @@
 
 setup(
     name="genotype_api",
-    version="0.3.0",
+    version="0.4.0",
     description="",
     long_description=long_description,
     long_description_content_type="text/markdown",