diff --git a/pdm.lock b/pdm.lock
index daa39b5..a2b2594 100644
--- a/pdm.lock
+++ b/pdm.lock
@@ -5,7 +5,7 @@
 groups = ["default", "build", "lint", "test"]
 strategy = ["cross_platform"]
 lock_version = "4.4"
-content_hash = "sha256:ca47eaae0de5aa6bcc3fde33b6c1fa7dc2476aeb680f00bb1c550fe06ad67c55"
+content_hash = "sha256:4295f6824f37484ec423b53bd425334b0e039a51d81261b52c8890928fcf3948"
 
 [[package]]
 name = "altgraph"
@@ -74,6 +74,31 @@ files = [
     {file = "macholib-1.16.2.tar.gz", hash = "sha256:557bbfa1bb255c20e9abafe7ed6cd8046b48d9525db2f9b77d3122a63a2a8bf8"},
 ]
 
+[[package]]
+name = "mypy"
+version = "1.7.0"
+requires_python = ">=3.8"
+summary = "Optional static typing for Python"
+dependencies = [
+    "mypy-extensions>=1.0.0",
+    "tomli>=1.1.0; python_version < \"3.11\"",
+    "typing-extensions>=4.1.0",
+]
+files = [
+    {file = "mypy-1.7.0-cp310-cp310-macosx_10_9_x86_64.whl", hash = "sha256:5da84d7bf257fd8f66b4f759a904fd2c5a765f70d8b52dde62b521972a0a2357"},
+    {file = "mypy-1.7.0-cp310-cp310-macosx_11_0_arm64.whl", hash = "sha256:a3637c03f4025f6405737570d6cbfa4f1400eb3c649317634d273687a09ffc2f"},
+    {file = "mypy-1.7.0-cp310-cp310-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:b633f188fc5ae1b6edca39dae566974d7ef4e9aaaae00bc36efe1f855e5173ac"},
+    {file = "mypy-1.7.0-cp310-cp310-musllinux_1_1_x86_64.whl", hash = "sha256:d6ed9a3997b90c6f891138e3f83fb8f475c74db4ccaa942a1c7bf99e83a989a1"},
+    {file = "mypy-1.7.0-cp310-cp310-win_amd64.whl", hash = "sha256:1fe46e96ae319df21359c8db77e1aecac8e5949da4773c0274c0ef3d8d1268a9"},
+    {file = "mypy-1.7.0-cp311-cp311-macosx_10_9_x86_64.whl", hash = "sha256:df67fbeb666ee8828f675fee724cc2cbd2e4828cc3df56703e02fe6a421b7401"},
+    {file = "mypy-1.7.0-cp311-cp311-macosx_11_0_arm64.whl", hash = "sha256:a79cdc12a02eb526d808a32a934c6fe6df07b05f3573d210e41808020aed8b5d"},
+    {file = "mypy-1.7.0-cp311-cp311-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:f65f385a6f43211effe8c682e8ec3f55d79391f70a201575def73d08db68ead1"},
+    {file = "mypy-1.7.0-cp311-cp311-musllinux_1_1_x86_64.whl", hash = "sha256:0e81ffd120ee24959b449b647c4b2fbfcf8acf3465e082b8d58fd6c4c2b27e46"},
+    {file = "mypy-1.7.0-cp311-cp311-win_amd64.whl", hash = "sha256:f29386804c3577c83d76520abf18cfcd7d68264c7e431c5907d250ab502658ee"},
+    {file = "mypy-1.7.0-py3-none-any.whl", hash = "sha256:96650d9a4c651bc2a4991cf46f100973f656d69edc7faf91844e87fe627f7e96"},
+    {file = "mypy-1.7.0.tar.gz", hash = "sha256:1e280b5697202efa698372d2f39e9a6713a0395a756b1c6bd48995f8d72690dc"},
+]
+
 [[package]]
 name = "mypy-extensions"
 version = "1.0.0"
@@ -248,6 +273,16 @@ files = [
     {file = "tomli-2.0.1.tar.gz", hash = "sha256:de526c12914f0c550d15924c62d72abc48d6fe7364aa87328337a31007fe8a4f"},
 ]
 
+[[package]]
+name = "typing-extensions"
+version = "4.8.0"
+requires_python = ">=3.8"
+summary = "Backported and Experimental Type Hints for Python 3.8+"
+files = [
+    {file = "typing_extensions-4.8.0-py3-none-any.whl", hash = "sha256:8f92fc8806f9a6b641eaa5318da32b44d401efaac0f6678c9bc448ba3605faa0"},
+    {file = "typing_extensions-4.8.0.tar.gz", hash = "sha256:df8e4339e9cb77357558cbdbceca33c303714cf861d1eef15e1070055ae8b7ef"},
+]
+
 [[package]]
 name = "voicemeeter-api"
 version = "2.5.2"
diff --git a/pyproject.toml b/pyproject.toml
index d844a70..1b189d4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "nvda_voicemeeter"
-version = "0.5.7b1"
+version = "0.5.7b2"
 description = "A Voicemeeter app compatible with NVDA"
 authors = [
     { name = "onyx-and-iris", email = "code@onyxandiris.online" },
@@ -23,6 +23,7 @@ build = [
 lint = [
     "black>=23.7.0",
     "ruff>=0.0.291",
+    "mypy>=1.7.0",
 ]
 test = [
     "psgdemos>=1.12.1",
diff --git a/src/nvda_voicemeeter/cdll.py b/src/nvda_voicemeeter/cdll.py
index d0162db..dc85abb 100644
--- a/src/nvda_voicemeeter/cdll.py
+++ b/src/nvda_voicemeeter/cdll.py
@@ -5,7 +5,7 @@ from pathlib import Path
 
 from .errors import NVDAVMError
 
-bits = 64 if ct.sizeof(ct.c_voidp) == 8 else 32
+bits = 64 if ct.sizeof(ct.c_void_p) == 8 else 32
 
 if platform.system() != "Windows":
     raise NVDAVMError("Only Windows OS supported")
diff --git a/src/nvda_voicemeeter/compound.py b/src/nvda_voicemeeter/compound.py
index ed20c04..14164fb 100644
--- a/src/nvda_voicemeeter/compound.py
+++ b/src/nvda_voicemeeter/compound.py
@@ -13,7 +13,10 @@ class LabelSlider(psg.Frame):
         if param in ("AUDIBILITY", "DENOISER"):
             size = 7
         else:
-            size = 4
+            if psg.theme() == "HighContrast":
+                size = 5
+            else:
+                size = 4
         layout = [
             [
                 psg.Text(param.capitalize(), size=size),
diff --git a/src/nvda_voicemeeter/util.py b/src/nvda_voicemeeter/util.py
index 4e27ac1..2a90d82 100644
--- a/src/nvda_voicemeeter/util.py
+++ b/src/nvda_voicemeeter/util.py
@@ -200,6 +200,23 @@ def _get_bus_assignments(kind) -> list:
     return [f"A{i}" for i in range(1, kind.phys_out + 1)] + [f"B{i}" for i in range(1, kind.virt_out + 1)]
 
 
+psg.theme_add_new(
+    "HighContrast",
+    {
+        "BACKGROUND": "#FFFFFF",
+        "TEXT": "#000000",
+        "INPUT": "#FAF9F6",
+        "TEXT_INPUT": "#000000",
+        "SCROLL": "#FAF9F6",
+        "BUTTON": ("#000000", "#FFFFFF"),
+        "PROGRESS": ("#000000", "#FFFFFF"),
+        "BORDER": 2,
+        "SLIDER_DEPTH": 3,
+        "PROGRESS_DEPTH": 0,
+    },
+)
+
+
 def get_themes_list() -> list:
     return [
         "Bright Colors",
@@ -221,4 +238,5 @@ def get_themes_list() -> list:
         "Neutral Blue",
         "Reds",
         "Sandy Beach",
+        "High Contrast",
     ]
diff --git a/src/nvda_voicemeeter/window.py b/src/nvda_voicemeeter/window.py
index 3377c2d..3af36eb 100644
--- a/src/nvda_voicemeeter/window.py
+++ b/src/nvda_voicemeeter/window.py
@@ -13,6 +13,8 @@ from .popup import Popup
 logger = logging.getLogger(__name__)
 
 psg.theme(configuration.get("default_theme", "Dark Blue 3"))
+if psg.theme() == "HighContrast":
+    psg.set_options(font=("Arial", 14))
 
 
 class NVDAVMWindow(psg.Window):
@@ -22,6 +24,7 @@ class NVDAVMWindow(psg.Window):
         self.vm = vm
         self.kind = self.vm.kind
         self.logger = logger.getChild(type(self).__name__)
+        self.logger.debug(f"loaded with theme: {psg.theme()}")
         self.cache = {
             "hw_ins": models._make_hardware_ins_cache(self.vm),
             "hw_outs": models._make_hardware_outs_cache(self.vm),
@@ -65,7 +68,7 @@ class NVDAVMWindow(psg.Window):
         if settings_path.exists():
             try:
                 defaultconfig = Path(configuration.get("default_config", ""))  # coerce the type
-                if defaultconfig.exists():
+                if defaultconfig.is_file() and defaultconfig.exists():
                     self.vm.set("command.load", str(defaultconfig))
                     self.logger.debug(f"config {defaultconfig} loaded")
                     self.TKroot.after(