diff --git a/requirements.txt b/requirements.txt
index 50d9bf8..5e06917 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,7 @@ funcy==1.11
 lenses==0.5.0
 hypothesis==3.66.30
 parsimonious==0.8.1
-pytest==3.2.3
+pytest==4.2.0
 pytest-cov==2.5.1
 pytest-flake8==0.9
 pytest-sugar==0.9.1