diff --git a/CLAUDE.md b/CLAUDE.md
index cea7120..e06c964 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -33,7 +33,7 @@ hbd passwd <username>
 
 Tests live in `tests/` (pytest, imported as a package). A second directory `test/` contains only TLS fixtures (`.pem` files), not test code.
 
-Line length: 111 characters (`black`, `flake8`, both configured).
+Line length: `black` formats to 111 characters; `flake8` allows up to 165 (set in `tox.ini` and `.flake8`).
 
 ## Architecture
 
diff --git a/pyproject.toml b/pyproject.toml
index 7a127c0..ec9a3f3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -89,7 +89,7 @@ include = ["hbd*"]
 line-length = 111
 
 [tool.flake8]
-max-line-length = 111
+max-line-length = 165
 
 [tool.pylint.format]
 max-line-length = 111
diff --git a/tox.ini b/tox.ini
index 39f5804..0f2d790 100644
--- a/tox.ini
+++ b/tox.ini
@@ -21,5 +21,5 @@ commands =
     mypy hbd
 
 [flake8]
-max-line-length = 111
+max-line-length = 165
 extend-ignore = E203