diff --git a/morphology-similarity/requirements.txt b/morphology-similarity/requirements.txt
index 83509ea..4c05c47 100644
--- a/morphology-similarity/requirements.txt
+++ b/morphology-similarity/requirements.txt
@@ -6,7 +6,7 @@ attrs==19.3.0
 autopep8==1.5
 awscli==1.18.16
 backcall==0.1.0
-bleach==3.1.0
+bleach==3.3.0
 boto3==1.11.10
 botocore==1.15.16
 cachetools==4.0.0