diff --git a/README.md b/README.md
index 65a8f36..f446c12 100644
--- a/README.md
+++ b/README.md
@@ -297,10 +297,10 @@ If a non-byte-string argument is passed to `umsgpack.unpackb()`, it will raise a
     >>> 
     ```
 
-* `InsufficientDataException`: Insufficient data to unpack the encoded object.
+* `InsufficientDataException`: Insufficient data to unpack the serialized object.
 
     ``` python
-    # Attempt to unpack a cut-off encoded 32-bit unsigned int
+    # Attempt to unpack a cut-off serialized 32-bit unsigned int
     >>> umsgpack.unpackb(b"\xce\xff\xff\xff")
     ...
     umsgpack.InsufficientDataException
diff --git a/umsgpack.py b/umsgpack.py
index 77d2eba..1d6fd2d 100644
--- a/umsgpack.py
+++ b/umsgpack.py
@@ -146,7 +146,7 @@ class UnsupportedTypeException(PackException):
 
 # Unpacking error
 class InsufficientDataException(UnpackException):
-    "Insufficient data to unpack the encoded object."
+    "Insufficient data to unpack the serialized object."
     pass
 class InvalidStringException(UnpackException):
     "Invalid UTF-8 string encountered during unpacking."
@@ -716,7 +716,7 @@ def _unpack2(fp, **options):
 
     Raises:
         InsufficientDataException(UnpackException):
-            Insufficient data to unpack the encoded object.
+            Insufficient data to unpack the serialized object.
         InvalidStringException(UnpackException):
             Invalid UTF-8 string encountered during unpacking.
         ReservedCodeException(UnpackException):
@@ -757,7 +757,7 @@ def _unpack3(fp, **options):
 
     Raises:
         InsufficientDataException(UnpackException):
-            Insufficient data to unpack the encoded object.
+            Insufficient data to unpack the serialized object.
         InvalidStringException(UnpackException):
             Invalid UTF-8 string encountered during unpacking.
         ReservedCodeException(UnpackException):
@@ -801,7 +801,7 @@ def _unpackb2(s, **options):
         TypeError:
             Packed data type is neither 'str' nor 'bytearray'.
         InsufficientDataException(UnpackException):
-            Insufficient data to unpack the encoded object.
+            Insufficient data to unpack the serialized object.
         InvalidStringException(UnpackException):
             Invalid UTF-8 string encountered during unpacking.
         ReservedCodeException(UnpackException):
@@ -846,7 +846,7 @@ def _unpackb3(s, **options):
         TypeError:
             Packed data type is neither 'bytes' nor 'bytearray'.
         InsufficientDataException(UnpackException):
-            Insufficient data to unpack the encoded object.
+            Insufficient data to unpack the serialized object.
         InvalidStringException(UnpackException):
             Invalid UTF-8 string encountered during unpacking.
         ReservedCodeException(UnpackException):