diff --git a/requirements.txt b/requirements.txt
index ec392a7..21b3192 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@ attrs==18.2.0
 codecov==2.0.15
 funcy==1.11
 lenses==0.5.0
-hypothesis==4.5.7
+hypothesis==4.5.8
 parsimonious==0.8.1
 pytest==4.2.0
 pytest-cov==2.6.1