diff --git a/basic_statistic/requirements.txt b/basic_statistic/requirements.txt
index f32beac..449e625 100644
--- a/basic_statistic/requirements.txt
+++ b/basic_statistic/requirements.txt
@@ -1,6 +1,6 @@
 attrs==19.3.0
 backcall==0.1.0
-bleach==3.1.4
+bleach==3.3.0
 decorator==4.4.1
 defusedxml==0.6.0
 entrypoints==0.3