diff --git a/edtf/parser/grammar.py b/edtf/parser/grammar.py
index 9840bde..dc0f66d 100644
--- a/edtf/parser/grammar.py
+++ b/edtf/parser/grammar.py
@@ -3,9 +3,9 @@
 # It's recommended to `enablePackrat()` immediately after importing pyparsing
 # https://github.com/pyparsing/pyparsing/wiki/Performance-Tips
 
-# TODO: uncomment this once benchmark testing has run once in CI
-# import pyparsing
-# pyparsing.ParserElement.enablePackrat()
+import pyparsing
+
+pyparsing.ParserElement.enablePackrat()
 
 from pyparsing import (
     Combine,