diff --git a/setup.py b/setup.py
index a243c6c79b..14265613fd 100755
--- a/setup.py
+++ b/setup.py
@@ -1259,7 +1259,7 @@ def addldflags(*s: str):
 #*******************************************************************************
 
 
-def get_base_conf_dir(install_dir: str, stripbuildroot=True) -> Sequence[str]:
+def get_base_conf_dir(install_dir: str, stripbuildroot=True) -> list[str]:
     # in some cases we want to strip the buildroot (to generate paths in the config file)
     # but in other cases we want the buildroot path (when writing out the config files)
     # and in some cases, we don't have the install_dir specified (called from detect_xorg_setup, and that's fine too)
diff --git a/xpra/client/gtk3/launcher.py b/xpra/client/gtk3/launcher.py
index 5a06b9d9c7..2a2ffcf53d 100755
--- a/xpra/client/gtk3/launcher.py
+++ b/xpra/client/gtk3/launcher.py
@@ -17,7 +17,7 @@
 import sys
 import traceback
 from typing import Any
-from collections.abc import Callable, Sequence
+from collections.abc import Callable
 
 from xpra.scripts.config import read_config, make_defaults_struct, validate_config, save_config
 from xpra.gtk.signals import register_os_signals
@@ -1138,7 +1138,7 @@ def main(argv) -> int:
         return do_main(argv)
 
 
-def do_main(argv: Sequence[str]) -> int:
+def do_main(argv: list[str]) -> int:
     from xpra.util.system import SIGNAMES
     from xpra.scripts.main import InitExit, InitInfo
     from xpra.platform.gui import init as gui_init, ready as gui_ready
diff --git a/xpra/net/file_transfer.py b/xpra/net/file_transfer.py
index 149c3eb0af..7d4634bddf 100644
--- a/xpra/net/file_transfer.py
+++ b/xpra/net/file_transfer.py
@@ -465,7 +465,7 @@ def error(message: str) -> None:
 
         # check file size and digest then process it:
         if chunk_state.written != chunk_state.filesize:
-            error("expected a file of %i bytes, got %i", chunk_state.filesize, chunk_state.written)
+            error(f"expected a file of {chunk_state.filesize} bytes, got {chunk_state.written}")
             return
 
         progress(chunk_state.written)
diff --git a/xpra/platform/events.py b/xpra/platform/events.py
index 076ef769d4..a61e79cdde 100755
--- a/xpra/platform/events.py
+++ b/xpra/platform/events.py
@@ -6,12 +6,12 @@
 # later version. See the file COPYING for details.
 
 import sys
-from collections.abc import Callable
+from collections.abc import Callable, Sequence
 
 from xpra.platform import platform_import
 
 
-EVENTS: tuple[str] = ("suspend", "resume", )
+EVENTS: Sequence[str] = ("suspend", "resume", )
 
 
 def add_handler(event: str, handler: Callable) -> None:
diff --git a/xpra/util/version.py b/xpra/util/version.py
index 21e53b4f56..e3eafde4d0 100755
--- a/xpra/util/version.py
+++ b/xpra/util/version.py
@@ -235,11 +235,11 @@ def add_attrs(attrs: dict) -> None:
 
 def parse_version(v) -> tuple[Any]:
     if isinstance(v, str) and v:
-        def maybeint(v):
+        def maybeint(value: str) -> int | str:
             try:
-                return int(v)
+                return int(value)
             except ValueError:
-                return v
+                return value
 
         v = tuple(maybeint(x) for x in v.split("-")[0].split("."))
     return tuple(v or ())
@@ -362,12 +362,12 @@ def get_latest_version(branch: str) -> bool | None | tuple[int, ...]:
         if len(branch_parts) >= 2:
             branch_strs.append("_" + branch_parts[0])           # ie: "_v6"
     branch_strs.append("")
-    platform_name = PLATFORM_FRIENDLY_NAMES.get(sys.platform, sys.platform)
+    platname = PLATFORM_FRIENDLY_NAMES.get(sys.platform, sys.platform)
     arch = get_platform_info().get("machine")
     for branch_str in branch_strs:
         for url in (
-            f"{CURRENT_VERSION_URL}{branch_str}_{platform_name}_{arch}?{XPRA_VERSION}",
-            f"{CURRENT_VERSION_URL}{branch_str}_{platform_name}?{XPRA_VERSION}",
+            f"{CURRENT_VERSION_URL}{branch_str}_{platname}_{arch}?{XPRA_VERSION}",
+            f"{CURRENT_VERSION_URL}{branch_str}_{platname}?{XPRA_VERSION}",
             f"{CURRENT_VERSION_URL}{branch_str}?{XPRA_VERSION}",
         ):
             latest_version_no = get_version_from_url(url)