diff --git a/entity_linkage/normalization/sgtb/requirements.txt b/entity_linkage/normalization/sgtb/requirements.txt
index d5d7703de..3b11284de 100644
--- a/entity_linkage/normalization/sgtb/requirements.txt
+++ b/entity_linkage/normalization/sgtb/requirements.txt
@@ -88,7 +88,7 @@ lxml==4.1.0
 MarkupSafe==1.0
 matplotlib==2.1.0
 mccabe==0.6.1
-mistune==0.7.4
+mistune==2.0.3
 mkl-fft==1.0.4
 mkl-random==1.0.1
 mpmath==0.19