diff --git a/requirements-dev.txt b/requirements-dev.txt
index 9911431..467bdc9 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,5 +1,5 @@
 # Pytest
-atomicwrites==1.2.1
+atomicwrites==1.4.0
 attrs==18.2.0
 more-itertools==5.0.0
 pluggy==0.8.0