diff --git a/requirements.txt b/requirements.txt
index d4fac65db..5c1ffd763 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1,10 @@
+atomicwrites==1.3.0
+attrs==19.1.0
+importlib-metadata==0.23
+more-itertools==7.2.0
+pluggy==0.13.0
+py==1.8.0
 pytest==4.1.0
 PyYAML==4.2b4
+six==1.12.0
+zipp==0.6.0