diff --git a/tests/unit/test_converters.py b/tests/unit/test_converters.py
index 4925940..5b2c695 100644
--- a/tests/unit/test_converters.py
+++ b/tests/unit/test_converters.py
@@ -347,6 +347,30 @@ def test_convert_not_sequence(self):
         # Verify
         assert value == "1"
 
+    def test_convert_enum(self):
+        try:
+            from enum import Enum
+
+            class OptionType(Enum):
+                OP1 = "FirstOp"
+                OP2 = "SecondOp"
+                OP3 = "ThirdOp"
+
+            # Setup
+            registry = converters.ConverterFactoryRegistry(
+                (converters.StandardConverter(),)
+            )
+            key = converters.keys.Sequence(converters.keys.CONVERT_TO_STRING)
+
+            # Run
+            converter = registry[key](None)
+            value = converter(OptionType.OP1)
+
+            # Verify
+            assert value == "FirstOp"
+        except ImportError:
+            pass
+
     def test_eq(self):
         assert converters.keys.Sequence(0) == converters.keys.Sequence(0)
         assert not (converters.keys.Sequence(1) == converters.keys.Sequence(0))
diff --git a/uplink/converters/keys.py b/uplink/converters/keys.py
index 2ca40d8..8dda471 100644
--- a/uplink/converters/keys.py
+++ b/uplink/converters/keys.py
@@ -5,6 +5,11 @@
 """
 # Standard library imports
 import functools
+try:
+    from enum import Enum
+except ImportError:  # pragma: no cover
+    # Enum is added on version 3.4
+    Enum = type(None)
 
 # Local imports
 
@@ -86,6 +91,8 @@ class Sequence(CompositeKey):
     def convert(self, converter, value):
         if isinstance(value, (list, tuple)):
             return list(map(converter, value))
+        elif isinstance(value, Enum) and hasattr(value, 'value'):
+            return value.value
         else:
             return converter(value)