diff --git a/requirements-dev.txt b/requirements-dev.txt
index 133cd16..c884b3b 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -7,7 +7,7 @@ pyflakes==2.1.1
 py==1.8.0
 more-itertools==7.0.0
 six==1.12.0
-attrs==19.1.0
+attrs==25.4.0
 pluggy==0.9.0
 pytest==4.4.0
 pytest-mock==1.10.3