diff --git a/requirements.txt b/requirements.txt
index df32bde..ba205f3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -36,7 +36,7 @@ Keras==2.2.4
 Keras-Applications==1.0.8
 Keras-Preprocessing==1.1.0
 kiwisolver==1.1.0
-lxml==4.4.0
+lxml==4.6.2
 Markdown==3.1.1
 MarkupSafe==1.1.1
 matplotlib==3.1.1
diff --git a/requirements/multiple_category_classification_keras.txt b/requirements/multiple_category_classification_keras.txt
index df32bde..ba205f3 100644
--- a/requirements/multiple_category_classification_keras.txt
+++ b/requirements/multiple_category_classification_keras.txt
@@ -36,7 +36,7 @@ Keras==2.2.4
 Keras-Applications==1.0.8
 Keras-Preprocessing==1.1.0
 kiwisolver==1.1.0
-lxml==4.4.0
+lxml==4.6.2
 Markdown==3.1.1
 MarkupSafe==1.1.1
 matplotlib==3.1.1