diff --git a/pyproject.toml b/pyproject.toml
index 0540642..1ad3d3b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -7,7 +7,7 @@ license = "MIT"
 
 [tool.poetry.dependencies]
 python = "^3.11"
-slack-bolt = "1.20.1"
+slack-bolt = "1.21.2"
 aiohttp = "3.10.8"
 
 [tool.poetry.dev-dependencies]