diff --git a/arrow/factory.py b/arrow/factory.py
index 5787dcf0..aad4af8b 100644
--- a/arrow/factory.py
+++ b/arrow/factory.py
@@ -9,6 +9,7 @@
 import calendar
 from datetime import date, datetime
 from datetime import tzinfo as dt_tzinfo
+from decimal import Decimal
 from time import struct_time
 from typing import Any, List, Optional, Tuple, Type, Union, overload
 
@@ -218,6 +219,8 @@ def get(self, *args: Any, **kwargs: Any) -> Arrow:
 
         if arg_count == 1:
             arg = args[0]
+            if isinstance(arg, Decimal):
+                arg = float(arg)
 
             # (None) -> raises an exception
             if arg is None:
diff --git a/tests/test_factory.py b/tests/test_factory.py
index 4bb81e87..53bba20d 100644
--- a/tests/test_factory.py
+++ b/tests/test_factory.py
@@ -1,5 +1,6 @@
 import time
 from datetime import date, datetime
+from decimal import Decimal
 
 import pytest
 from dateutil import tz
@@ -263,6 +264,13 @@ def test_one_arg_bool(self):
         with pytest.raises(TypeError):
             self.factory.get(True)
 
+    def test_one_arg_decimal(self):
+        result = self.factory.get(Decimal(1577836800.26843))
+
+        assert result._datetime == datetime(
+            2020, 1, 1, 0, 0, 0, 268430, tzinfo=tz.tzutc()
+        )
+
     def test_two_args_datetime_tzinfo(self):
 
         result = self.factory.get(datetime(2013, 1, 1), tz.gettz("US/Pacific"))