diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 6fc863c..8f4df8c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -13,7 +13,7 @@ jobs:
 
     strategy:
       matrix:
-        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11", "pypy-3.7"]
+        python-version: ["3.8", "3.9", "3.10", "3.11", "pypy-3.10"]
 
     steps:
       - uses: "actions/checkout@v2"
@@ -44,5 +44,6 @@ jobs:
       - name: "Run mypy"
         run: |
           set -xe
+          python -m pip install mypy==1.7.0
           python -m mypy --strict pyte
         shell: bash
diff --git a/pyte/screens.py b/pyte/screens.py
index 25d6a36..ecec97d 100644
--- a/pyte/screens.py
+++ b/pyte/screens.py
@@ -35,9 +35,9 @@
 import warnings
 from collections import deque, defaultdict
 from functools import lru_cache
-from typing import Any, Callable, DefaultDict, Dict, Generator, List, NamedTuple, Optional, Set, Sequence, TextIO, TypeVar
+from typing import Any, Callable, Dict, Generator, List, NamedTuple, Optional, Set, Sequence, TextIO, TypeVar
 
-from wcwidth import wcwidth as _wcwidth  # type: ignore[import]
+from wcwidth import wcwidth as _wcwidth  # type: ignore[import-not-found]
 
 from . import (
     charsets as cs,