diff --git a/docs/v1/accounting/index.html b/docs/v1/accounting/index.html
index 459219a9..66072622 100644
--- a/docs/v1/accounting/index.html
+++ b/docs/v1/accounting/index.html
@@ -12293,7 +12293,7 @@
         <nav id="scrollingNav">
           <ul class="sidenav nav nav-list">
             <li class="nav-header" data-group="Accounting"><strong>SDK: </strong><span id='sdk-name'></span></li>
-            <li class="nav-header" data-group="Accounting"><strong>VSN: </strong>1.8.0</li>
+            <li class="nav-header" data-group="Accounting"><strong>VSN: </strong>1.8.1</li>
             <li class="nav-header" data-group="Accounting"><a href="#api-Accounting">Methods</a></li>
             <li data-group="Accounting" data-name="createAccount" class="">
               <a href="#api-Accounting-createAccount">createAccount</a>
diff --git a/setup.py b/setup.py
index fff2549e..6ee59f09 100644
--- a/setup.py
+++ b/setup.py
@@ -48,5 +48,5 @@ def read_file(filename):
     keywords="xero python sdk API oAuth",
     name="xero_python",
     packages=find_packages(include=["xero_python", "xero_python.*"]),
-    version="1.8.0",
+    version="1.8.1",
 )
diff --git a/xero_python/__init__.py b/xero_python/__init__.py
index 45088345..2a6b75a7 100644
--- a/xero_python/__init__.py
+++ b/xero_python/__init__.py
@@ -2,4 +2,4 @@
 
 __author__ = """Xero Developer API"""
 __email__ = "api@xero.com"
-__version__ = "1.8.0"
+__version__ = "1.8.1"
diff --git a/xero_python/api_client/deserializer.py b/xero_python/api_client/deserializer.py
index e8f177a3..6a2e4b8e 100644
--- a/xero_python/api_client/deserializer.py
+++ b/xero_python/api_client/deserializer.py
@@ -22,7 +22,7 @@
 )
 
 MS_DATETIME_RE = re.compile(r"/Date\((?P<timestamp>-?\d+)(?P<tzinfo>[+-]\d{2,4})?\)/$")
-
+DATE_WITH_NO_DAY_RE = re.compile("(\d\d\d\d)-(\d\d)")
 
 def deserialize_routing(data_type, data, model_finder):
     """Custom logic to find matching deserialize implementation and
@@ -250,6 +250,8 @@ def deserialize_datetime_ms(data_type, data, model_finder):
         timestamp_ms = int(match.groupdict()["timestamp"])
         timestamp_s = timestamp_ms / 1000
         return datetime.datetime.fromtimestamp(timestamp_s, tz=tz_info)
+    elif DATE_WITH_NO_DAY_RE.match(str(data)):
+        return datetime.datetime.strptime(data + '-01', '%Y-%m-%d')
     else:
         raise ValueError("Invalid datetime value {!r}".format(data))
 
diff --git a/xero_python/docs/README.md b/xero_python/docs/README.md
index a90307b4..8679dfa7 100644
--- a/xero_python/docs/README.md
+++ b/xero_python/docs/README.md
@@ -4,7 +4,7 @@ These endpoints are related to managing authentication tokens and identity for X
 The `xero_python` package is automatically generated by the [XeroAPI SDK 2.0 Codegen](https://github.com/xero-github/xeroapi-sdk-codegen) project:
 
 - API version: 2.13.4
-- Package version: 1.8.0
+- Package version: 1.8.1
 - Build package: org.openapitools.codegen.languages.PythonClientCodegen
 For more information, please visit [https://developer.xero.com](https://developer.xero.com)