diff --git a/pyproject.toml b/pyproject.toml
index 7d5be9d..aa680a1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -32,7 +32,7 @@ dependencies = [
     "mcp[cli]>=2,<3",
     "pyyaml>=6.0",
     "pydantic>=2.0",
-    "pynacl>=1.5.0",
+    "pynacl>=1.6.2",
     "python-frontmatter>=1.0.0",
     "prometheus-client>=0.26.0",
     "aiosqlite>=0.22.1",