diff --git a/pyproject.toml b/pyproject.toml
index 028e01d8..d69bf93d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -28,7 +28,7 @@ timeout = "60"
 # Dev dependencies.
 dev = [
     "flake8 == 7.1.0",
-    "pytest == 8.2.2",
+    "pytest == 8.3.1",
     "pytest-timeout == 2.3.1",
     "tclint == 0.3.2",
     "lambdalib == 0.2.6"