diff --git a/pyproject.toml b/pyproject.toml
index 830df7ff8..2c1d22cfc 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -28,7 +28,7 @@ dependencies = [
     "psutil == 5.9.8",  # Oct 4 2023, pulls system stats into TUI and BCP
     "pyserial == 3.5",  # Oct 4 2023, some older platforms use this
     "pyserial-asyncio == 0.6", # Oct 4 2023, handles all modern serial communication
-    "ruamel.yaml == 0.17.32",  # Oct 4, 2023, main config file interface
+    "ruamel.yaml == 0.18.6",  # Oct 4, 2023, main config file interface
     "sortedcontainers == 2.4.0",  # Oct 4 2023, used by platform batch light system
     "terminaltables == 3.1.10",  # Oct 4 2023, used for the service CLI
     "Pillow == 9.5.0"  # Nov 4 2023. Asciimatics needs Pillow > 2.7, but latest 10.x breaks kivy for now (fix due in 2.3), so we pin to latest working Pillow for now.