diff --git a/poetry.lock b/poetry.lock
index 468efb5..d647e30 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -510,4 +510,4 @@ typing-extensions = ">=4.12.0"
 [metadata]
 lock-version = "2.1"
 python-versions = ">=3.11,<3.13"
-content-hash = "2b48ce546bbd1f272aa423d106192e13f6bf2e71cfad83281e512c9005ac76e3"
+content-hash = "7322727d3aa348f07e3eff8364ab01e118b68507e5229edd6e7fbb03184c82e8"
diff --git a/pyproject.toml b/pyproject.toml
index 476044f..740961d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -15,7 +15,7 @@ rich = "^13"
 
 [tool.poetry.group.dev.dependencies]
 pytest = "^8"
-ruff = "^0.6"
+ruff = "0.6.9"
 black = "^24.8"
 mypy = "^1.11"
 
diff --git a/src/diff_risk_dashboard/cli.py b/src/diff_risk_dashboard/cli.py
index 69ce753..0c160aa 100644
--- a/src/diff_risk_dashboard/cli.py
+++ b/src/diff_risk_dashboard/cli.py
@@ -87,7 +87,7 @@ def bar(n: int) -> str:
         w = max(1, round(n / maxc * bar_w))
         return "█" * w
 
-    title = Text.assemble(
+    title = Text.assemble(  # type: ignore[arg-type]
         ("Diff Risk Dashboard ", "bold"),
         (emoji + " ",),
         ("— Worst: ", "dim"),