diff --git a/test/runner/requirements/constraints.txt b/test/runner/requirements/constraints.txt
index 2bc17ba611..0328e5ab70 100644
--- a/test/runner/requirements/constraints.txt
+++ b/test/runner/requirements/constraints.txt
@@ -40,5 +40,5 @@ isort == 4.3.15
 lazy-object-proxy == 1.3.1
 mccabe == 0.6.1
 pylint == 2.3.1
-typed-ast == 1.3.1
+typed-ast == 1.4.0  # 1.4.0 is required to compile on Python 3.8
 wrapt == 1.11.1