diff --git a/requirements.txt b/requirements.txt
index 7f1f1fe..e2b27b2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,4 +9,4 @@ pyahocorasick==1.4.0
 pysam==0.16.0.1
 beautifulsoup4==4.9.3
 requests==2.24.0
-lxml==4.6.3
+lxml==4.6.5