diff --git a/pyproject.toml b/pyproject.toml
index b7a7548..d1bed6c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -37,7 +37,7 @@ dependencies = [
 
 [dependency-groups]
 dev = [
-    "pytest>=8.0",
+    "pytest==9.1.1",
     "ruff",
 ]
 
diff --git a/uv.lock b/uv.lock
index 5e43302..d8c18c3 100644
--- a/uv.lock
+++ b/uv.lock
@@ -1,5 +1,5 @@
 version = 1
-revision = 3
+revision = 5
 requires-python = ">=3.11"
 
 [[package]]
@@ -173,7 +173,7 @@ requires-dist = [
 
 [package.metadata.requires-dev]
 dev = [
-    { name = "pytest", specifier = ">=8.0" },
+    { name = "pytest", specifier = "==9.1.1" },
     { name = "ruff" },
 ]