diff --git a/requirements-dev.txt b/requirements-dev.txt
index 715d317..e9a62fe 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -5,7 +5,7 @@ fasttext==0.9.1
 ipykernel==5.1.0
 joblib==0.13.1
 jupyter==1.0.0
-lxml==4.3.1
+lxml==4.9.1
 matplotlib==3.0.2
 matplotlib-venn==0.11.5
 mlflow==1.9.0
diff --git a/requirements.txt b/requirements.txt
index 984f06a..b329c69 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -20,4 +20,4 @@ tensorflow==2.4.0
 torch>=1.4.0,<1.6
 tqdm==4.55.1
 transformers>=2.8.0
-lxml==4.6.2
+lxml==4.9.1