diff --git a/pyproject.toml b/pyproject.toml
index 137e198..6ff6eb9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -5,7 +5,7 @@ requires-python = ">=3.10"
 description = "Library for Acoustic Signal Processing"
 license = { "file" = "LICENSE" }
 authors = [{ "name" = "J.A. de Jong", "email" = "j.a.dejong@ascee.nl" }]
-version = "1.6.5"
+version = "1.6.6"
 
 keywords = ["DSP", "DAQ", "Signal processing"]