diff --git a/requirements.txt b/requirements.txt
index 55ae2dab61bd887106b0397efb674e030dd33150..076995265094b62172afdeecc0ece056101010dd 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -11,6 +11,6 @@ requests==2.21.0
 sciencebeam-alignment==0.0.2
 sciencebeam-utils==0.0.1
 sklearn-crfsuite==0.3.6
-six==1.11.0
+six==1.12.0
 tensorflow-transform==0.11.0
 tqdm==4.30.0