diff --git a/README.md b/README.md
index 14dda82..e9452cf 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 Python package for building MODFLOW-based programs from source files.
 
-### Version 1.2.10
+### Version 1.2.11.dev0
 
 [![PyPI Version](https://img.shields.io/pypi/v/mfpymake.png)](https://pypi.python.org/pypi/mfpymake)
 [![Anaconda Version](https://anaconda.org/conda-forge/mfpymake/badges/version.svg)](https://anaconda.org/conda-forge/mfpymake)  
diff --git a/pymake/config.py b/pymake/config.py
index c272e11..83c7efe 100644
--- a/pymake/config.py
+++ b/pymake/config.py
@@ -1,6 +1,6 @@
 __author__ = "Joseph D. Hughes"
 __date__ = "June 17, 2024"
-__version__ = "1.2.10"
+__version__ = "1.2.11.dev0"
 __maintainer__ = "Joseph D. Hughes"
 __email__ = "jdhughes@usgs.gov"
 __status__ = "Production"
diff --git a/version.txt b/version.txt
index 732aa7d..a25ca25 100644
--- a/version.txt
+++ b/version.txt
@@ -1 +1 @@
-1.2.10
\ No newline at end of file
+1.2.11.dev0
\ No newline at end of file