diff --git a/pyproject.toml b/pyproject.toml
index 2205968f..f67d5c64 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -30,7 +30,7 @@ dependencies = [
   "idutils~=1.2",
   "jmespath~=1.0",
   "levenshtein~=0.24.0",
-  "lxml~=5.1.0",
+  "lxml=5.1.0",
   "pandas~=2.1",
   "pyRdfa3~=3.5",
   "pyld~=2.0",