diff --git a/pyproject.toml b/pyproject.toml
index fb1b8f0..1e01a69 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -12,7 +12,7 @@ dependencies = [
 
 [project.optional-dependencies]
 dev = [
-    "pytest==8.4.2",
+    "pytest==9.1.1",
     "ruff==0.15.19",
 ]
 
diff --git a/requirements.txt b/requirements.txt
index d0ba342..087f989 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,7 +5,7 @@ slack-cli-hooks<1.0.0
 # If you use a different LLM vendor, replace this dependency
 openai==2.43.0
 
-pytest==9.0.2
+pytest==9.1.1
 ruff==0.15.19
 python-dotenv==1.2.2
 slack-cli-hooks<1.0.0