diff --git a/pyproject.toml b/pyproject.toml
index f984a5d..39c9a76 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "poetry.core.masonry.api"
 
 [tool.poetry]
 name = "intro-to-data-science"
-version = "0.1.0.dev0"
+version = "0.3.0.dev0"
 
 authors = [
     "Alexander Hess <alexander@webartifex.biz>",