diff --git a/docs/source/conf.py b/docs/source/conf.py
index e9ba872..36d9250 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -15,7 +15,7 @@
 project = "PyBispectra"
 copyright = "2023, Thomas S. Binns"
 author = "Thomas S. Binns"
-release = "1.2.1"
+release = "1.3.0dev"
 
 # -- General configuration ---------------------------------------------------
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#general-configuration
diff --git a/pyproject.toml b/pyproject.toml
index c3b2d80..b1e8314 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -22,7 +22,7 @@ description = "A Python signal processing package for computing spectral-domain
 name = "pybispectra"
 readme = "README.md"
 requires-python = ">=3.10"
-version = "1.2.1"
+version = "1.3.0dev"
 
 [project.optional-dependencies]
 dev = ["pybispectra[doc]", "pybispectra[lint]", "pybispectra[test]"]