diff --git a/build-requirements-3.3.txt b/build-requirements-3.3.txt
index 555fba076..a7e1e9fda 100644
--- a/build-requirements-3.3.txt
+++ b/build-requirements-3.3.txt
@@ -4,3 +4,4 @@ hypothesis<3.44
 coveralls
 pylint
 diff_cover
+typed-ast<1.3.1