diff --git a/docker/requirements.txt b/docker/requirements.txt
index 9526066..d12ff2d 100644
--- a/docker/requirements.txt
+++ b/docker/requirements.txt
@@ -2,7 +2,7 @@ matplotlib==2.2.2
 pandas==0.23.0
 scikit-image==0.14.0
 opencv-python==3.4.1.15
-bleach==1.5.0
+bleach==3.1.1
 pytest==3.6.3
 custom_inherit==2.2.0
 sphinx==1.7.5
diff --git a/docker/sphinx-requirements.txt b/docker/sphinx-requirements.txt
index f2e2127..305c753 100644
--- a/docker/sphinx-requirements.txt
+++ b/docker/sphinx-requirements.txt
@@ -4,7 +4,7 @@ matplotlib==2.2.2
 pandas==0.23.0
 scikit-image==0.14.0
 opencv-python==3.4.1.15
-bleach==1.5.0
+bleach==3.1.1
 pytest==3.6.3
 custom_inherit==2.2.0
 sphinx==1.7.5