diff --git a/hippolyzer/lib/base/legacy_schema.py b/hippolyzer/lib/base/legacy_schema.py
index d878e6c..60b20c8 100644
--- a/hippolyzer/lib/base/legacy_schema.py
+++ b/hippolyzer/lib/base/legacy_schema.py
@@ -46,7 +46,7 @@ class SchemaFieldSerializer(abc.ABC, Generic[_T]):
 class SchemaDate(SchemaFieldSerializer[dt.datetime]):
     @classmethod
     def deserialize(cls, val: str) -> dt.datetime:
-        return dt.datetime.utcfromtimestamp(int(val))
+        return dt.datetime.fromtimestamp(int(val), dt.timezone.utc)
 
     @classmethod
     def serialize(cls, val: dt.datetime) -> str:
@@ -54,7 +54,7 @@ class SchemaDate(SchemaFieldSerializer[dt.datetime]):
 
     @classmethod
     def from_llsd(cls, val: Any, flavor: str) -> dt.datetime:
-        return dt.datetime.utcfromtimestamp(val)
+        return dt.datetime.fromtimestamp(val, dt.timezone.utc)
 
     @classmethod
     def to_llsd(cls, val: dt.datetime, flavor: str):
diff --git a/requirements.txt b/requirements.txt
index 378955b..4c6f8ad 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -58,7 +58,7 @@ pyperclip==1.8.2
 PySide6-Essentials==6.6.1
 python-dateutil==2.8.2
 qasync==0.27.1
-recordclass==0.18.2
+recordclass==0.23.1
 ruamel.yaml==0.18.5
 ruamel.yaml.clib==0.2.8
 service-identity==23.1.0
diff --git a/setup.py b/setup.py
index 0b7f4ec..1ec45f7 100644
--- a/setup.py
+++ b/setup.py
@@ -85,7 +85,7 @@ setup(
         'defusedxml',
         'aiohttp<4.0.0',
         # Newer recordclasses break!
-        'recordclass>0.15,<0.18.3',
+        'recordclass>=0.23.1,<0.24',
         'lazy-object-proxy',
         # requests breaks with newer idna
         'idna<3,>=2.5',