diff --git a/pyproject.toml b/pyproject.toml
index dbe409d..6dccab0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "pricehist"
-version = "1.3.0"
+version = "1.4.0"
 description = "Fetch and format historical price data"
 authors = ["Chris Berkhout <chris@chrisberkhout.com>"]
 license = "MIT"
diff --git a/src/pricehist/__init__.py b/src/pricehist/__init__.py
index 67bc602..3e8d9f9 100644
--- a/src/pricehist/__init__.py
+++ b/src/pricehist/__init__.py
@@ -1 +1 @@
-__version__ = "1.3.0"
+__version__ = "1.4.0"