diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 4f78def4a..32b8f7c1c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -76,7 +76,7 @@ jobs:
                 python-version: 3.8
 
             - name: Install build-only deps
-              run: pip install flake8 mypy types-requests types-docutils types-docutils sphinx
+              run: pip install flake8 mypy types-requests types-docutils sphinx
 
             - name: Run pyflakes
               run: python -m flake8 --count .
diff --git a/kitty/complete.py b/kitty/complete.py
index 804255c40..cb8f67b4d 100644
--- a/kitty/complete.py
+++ b/kitty/complete.py
@@ -385,7 +385,7 @@ def complete_files_and_dirs(
     add_prefix: Optional[str] = None
 ) -> None:
     dirs, files_ = path_completion(prefix or '')
-    files = filter(predicate, files_)
+    files: Iterable[str] = filter(predicate, files_)
     if add_prefix:
         dirs = list(add_prefix + x for x in dirs)
         files = (add_prefix + x for x in files)