diff --git a/pyproject.toml b/pyproject.toml
index 8c0753c..9301b44 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -19,7 +19,7 @@ readme = "README.md"
 dependencies = ["dtactions ~= 1.6.4.dev3",
         "debugpy >= 1.2.0",
 		"pywin32 >= 304",
-		"natlinkcore >= 5.4.1",
+		"natlinkcore ~= 5.4.2.dev1",
         "FreeSimpleGUI>=5.1.0"]
 		  		
 classifiers=[	"Development Status :: 2 - Pre-Alpha",