diff --git a/pyproject.toml b/pyproject.toml
index 67988d6..f2a8613 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "cpu_governor_auto_adjust"
-version = "1.2.0"
+version = "1.2.1"
 description = "CPU Governor Auto Adjust based on Roon Activity and System Load"
 authors = [
     { name = "Martin Reurekas", email = "martin@semrks.nl" }
@@ -10,7 +10,7 @@ readme = "README.md"
 requires-python = ">=3.12"
 dependencies = [
     "xmltodict~=0.14",
-    "lxml~=5.3",
+    "lxml>=5.3,<7",
     "roonapi~=0.1",
     "cpufreq~=0.3"
 ]