diff --git a/poetry.lock b/poetry.lock
index b4de72b5..71935ab0 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -52,14 +52,14 @@ trio = ["trio (>=0.32.0)"]
 
 [[package]]
 name = "attrs"
-version = "25.4.0"
+version = "26.1.0"
 description = "Classes Without Boilerplate"
 optional = false
 python-versions = ">=3.9"
 groups = ["dev"]
 files = [
-    {file = "attrs-25.4.0-py3-none-any.whl", hash = "sha256:adcf7e2a1fb3b36ac48d97835bb6d8ade15b8dcce26aba8bf1d14847b57a3373"},
-    {file = "attrs-25.4.0.tar.gz", hash = "sha256:16d5969b87f0859ef33a48b35d55ac1be6e42ae49d5e853b597db70c35c57e11"},
+    {file = "attrs-26.1.0-py3-none-any.whl", hash = "sha256:c647aa4a12dfbad9333ca4e71fe62ddc36f4e63b2d260a37a8b83d2f043ac309"},
+    {file = "attrs-26.1.0.tar.gz", hash = "sha256:d03ceb89cb322a8fd706d4fb91940737b6642aa36998fe130a9bc96c985eff32"},
 ]
 
 [[package]]
@@ -2210,4 +2210,4 @@ compatible-mypy = ["mypy"]
 [metadata]
 lock-version = "2.1"
 python-versions = "^3.11"
-content-hash = "47538a1454397753ad55b58b8ccb599a47e886ba54cb9d254578ba4d11c96812"
+content-hash = "1ea018ada53dd471c59f582cb1f5b95cf6aa7dc475d01771c59552e6a12d3cfc"
diff --git a/pyproject.toml b/pyproject.toml
index f26eba09..a2e7649f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -62,7 +62,7 @@ check-laws = ["pytest", "hypothesis"]
 [tool.poetry.group.dev.dependencies]
 anyio = "^4.3"
 trio = ">=0.30,<0.34"
-attrs = "^25.3"
+attrs = ">=25.3,<27.0"
 httpx = "^0.28"
 wemake-python-styleguide = "^1.6"
 codespell = "^2.2"