diff --git a/pyproject.toml b/pyproject.toml
index c5ac7e0c..81328e08 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -3,7 +3,7 @@ name = "nidaqmx"
 description = "NI-DAQmx Python API"
 license = "MIT"
 keywords = ["nidaqmx", "nidaq", "daqmx", "daq"]
-version = "1.5.0"
+version = "1.5.1.dev0"
 classifiers = [
   "Development Status :: 5 - Production/Stable",
   "Intended Audience :: Developers",