diff --git a/docs/conf.py b/docs/conf.py
index 5343a95..4160952 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -9,7 +9,7 @@
 project = "pyastgrep"
 copyright = "2023, Luke Plant"
 author = "Luke Plant"
-release = "1.3.2"
+release = "1.3.3-dev1"
 
 # -- General configuration ---------------------------------------------------
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#general-configuration
diff --git a/docs/history.rst b/docs/history.rst
index 9a4e0a9..d22ce0f 100644
--- a/docs/history.rst
+++ b/docs/history.rst
@@ -2,6 +2,9 @@
 History
 =======
 
+Version 1.3.3 - unreleased
+--------------------------
+
 Version 1.3.2 - 2024-01-10
 --------------------------
 
diff --git a/src/pyastgrep/__init__.py b/src/pyastgrep/__init__.py
index f708a9b..a66d0c7 100644
--- a/src/pyastgrep/__init__.py
+++ b/src/pyastgrep/__init__.py
@@ -1 +1 @@
-__version__ = "1.3.2"
+__version__ = "1.3.3-dev1"