diff --git a/pyproject.toml b/pyproject.toml
index d5a093f..c835158 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -29,7 +29,7 @@ classifiers = [
 
 [tool.poetry.dependencies]
 python = "^3.9"
-certifi = "^2025.1.31"
+certifi = "^2026.4.22"
 openai = "^1.4.0"
 python-dotenv = "^1.0.0"
 slack-bolt = "^1.18.1"