diff --git a/pip-requirements.txt b/pip-requirements.txt
index 574dac43b1..0fecd37f2a 100644
--- a/pip-requirements.txt
+++ b/pip-requirements.txt
@@ -14,3 +14,4 @@
 
 edk2-pytool-library==0.10.*
 edk2-pytool-extensions~=0.13.3
+antlr4-python3-runtime==4.7.1