diff --git a/CHANGES.md b/CHANGES.md
index abbe3fa..c709e53 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,5 +1,11 @@
 # Changes for bmi-geotiff
 
+## 0.3.4 (unreleased)
+
+
+- Nothing changed yet.
+
+
 ## 0.3.3 (2024-08-17)
 
 - Update CI workflows (#29)
diff --git a/bmi_geotiff/_version.py b/bmi_geotiff/_version.py
index e19434e..cd55fd9 100644
--- a/bmi_geotiff/_version.py
+++ b/bmi_geotiff/_version.py
@@ -1 +1 @@
-__version__ = "0.3.3"
+__version__ = "0.3.4.dev0"