diff --git a/requirements-dev.txt b/requirements-dev.txt
index 61f007c..2e479f6 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -8,7 +8,7 @@ py==1.5.3
 atomicwrites==1.0
 more-itertools==4.0.0
 six==1.10.0
-attrs==17.4.0
+attrs==25.4.0
 pluggy==0.6.0
 pytest==3.6.1