diff --git a/pyproject.toml b/pyproject.toml
index cc966b9..1d1a24f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -32,8 +32,8 @@ classifiers = [
     "Topic :: Utilities",
 ]
 dependencies = [
-    "click~=8.3",
-    "runez~=5.3",
+    "click<9",
+    "runez<6",
 ]
 dynamic = ["version"]
 
@@ -43,6 +43,9 @@ mgit = "mgit.cli:main"
 [project.urls]
 Source = "https://github.com/zsimic/mgit"
 
+[tool.pyright]
+pythonVersion = "3.10"
+include = ["src"]
 
 [tool.ruff]
 cache-dir = ".tox/.ruff_cache"
diff --git a/src/mgit/git.py b/src/mgit/git.py
index d0a44a1..d4fcb92 100644
--- a/src/mgit/git.py
+++ b/src/mgit/git.py
@@ -344,10 +344,8 @@ def run_git_command(self, *args):
         """
         cmd, pretty_args = self._git_command(args)
         LOG.debug("Running: %s", pretty_args)
-        proc = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)  # noqa: S603
+        proc = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, text=True)  # noqa: S603
         output, error = proc.communicate()
-        output = runez.decode(output)
-        error = runez.decode(error)
         if proc.returncode == 0:
             return output, GitRunReport()
 
diff --git a/tests/conftest.py b/tests/conftest.py
index 0de2ce2..e5437de 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -1,5 +1,5 @@
-from runez.conftest import cli
+from runez.conftest import cli, ClickRunner  # noqa: F401, fixtures
 
 from mgit.cli import main
 
-cli.default_main = main
+ClickRunner.default_main = main
diff --git a/tox.ini b/tox.ini
index 96d75a5..a4c7316 100644
--- a/tox.ini
+++ b/tox.ini
@@ -22,6 +22,12 @@ deps = ruff
 commands = ruff check
            ruff format --diff
 
+[testenv:typecheck]
+usedevelop = True
+deps = pyright
+       -rtests/requirements.txt
+commands = pyright
+
 [testenv:reformat]
 skip_install = True
 deps = ruff