diff --git a/noxfile.py b/noxfile.py
index 31b71fd..0610d28 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -27,17 +27,20 @@
 from pathlib import Path
 
 import nox
-import toml
+import msgspec
 
 SessionT = Callable[[nox.Session], None]
 InjectorT = Callable[[SessionT], SessionT]
 
 
 def parse_dependencies() -> t.Dict[str, str]:
-    data = toml.load("pyproject.toml")["tool"]["poetry"]
+    with open("pyproject.toml", "rb") as f:
+        data = msgspec.toml.decode(f.read())
+
+    poetry = data["tool"]["poetry"]
     deps: t.Dict[str, t.Union[str, t.Dict[str, str]]] = {
-        **data["dependencies"],
-        **data["group"]["dev"]["dependencies"],
+        **poetry["dependencies"],
+        **poetry["group"]["dev"]["dependencies"],
     }
 
     for k, v in deps.items():
diff --git a/pyproject.toml b/pyproject.toml
index fe2a305..cbff3d0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -50,8 +50,6 @@ pyright = "==1.1.344"
 pytest = "==7.4.4"
 pytest-asyncio = "==0.23.3"
 pytest-testdox = "==3.1.0"
-types-toml = "==0.10.8.7"
-toml = "==0.10.2"
 
 [tool.black]
 line-length = 99
diff --git a/wom/models/groups/models.py b/wom/models/groups/models.py
index ca02633..d4293bd 100644
--- a/wom/models/groups/models.py
+++ b/wom/models/groups/models.py
@@ -24,6 +24,8 @@
 import typing as t
 from datetime import datetime
 
+import msgspec
+
 from wom import enums
 
 from ..base import BaseModel
@@ -318,16 +320,7 @@ class MetricLeaders(BaseModel):
     """
 
 
-class GroupStatistics(
-    BaseModel,
-    rename={
-        "maxed_combat_count": "maxedCombatCount",
-        "maxed_total_count": "maxedTotalCount",
-        "maxed_200ms_count": "maxed200msCount",
-        "average_stats": "averageStats",
-        "metric_leaders": "metricLeaders",
-    },
-):
+class GroupStatistics(BaseModel):
     """Represents accumulated group statistics."""
 
     maxed_combat_count: int
@@ -336,7 +329,7 @@ class GroupStatistics(
     maxed_total_count: int
     """The number of maxed total level players in the group."""
 
-    maxed_200ms_count: int
+    maxed_200ms_count: int = msgspec.field(name="maxed200msCount")
     """The number of maxed 200M xp players in the group."""
 
     average_stats: Snapshot