diff --git a/requirements_pinned.txt b/requirements_pinned.txt
--- a/requirements_pinned.txt
+++ b/requirements_pinned.txt
@@ -6,6 +6,7 @@ contextlib2==0.6.0.post1
 cffi==1.12.3
 hupper==1.9.1
 importlib-metadata==0.23
+packaging==19.2.0
 pathlib2==2.3.5
 pygments==2.4.2
 pyparsing==2.4.5
@@ -14,3 +15,4 @@ pluggy==0.13.1
 scandir==1.10.0
 setproctitle==1.1.10
 venusian==1.2.0
+wcwidth==0.1.7