diff --git a/pyproject.toml b/pyproject.toml
index 52a3341..18d5acd 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "pricehist"
-version = "0.1.7"
+version = "1.0.0"
 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 f1380ee..5becc17 100644
--- a/src/pricehist/__init__.py
+++ b/src/pricehist/__init__.py
@@ -1 +1 @@
-__version__ = "0.1.7"
+__version__ = "1.0.0"