diff --git a/requirements-dev.txt b/requirements-dev.txt
index 9d35887..9bd17e8 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -10,7 +10,7 @@ wcwidth==0.1.7
 pyparsing==2.4.7
 packaging==19.2
 attrs==19.3.0
-atomicwrites==1.3.0
+atomicwrites==1.4.0
 colorama==0.4.3
 py==1.8.0
 pytest==5.4.1