diff --git a/inventree/base.py b/inventree/base.py
index be380fa..9a1a3f6 100644
--- a/inventree/base.py
+++ b/inventree/base.py
@@ -6,7 +6,7 @@
 
 from . import api as inventree_api
 
-INVENTREE_PYTHON_VERSION = "0.16.0"
+INVENTREE_PYTHON_VERSION = "0.16.1"
 
 
 logger = logging.getLogger('inventree')
diff --git a/inventree/build.py b/inventree/build.py
index de5cbe0..9b05d82 100644
--- a/inventree/build.py
+++ b/inventree/build.py
@@ -16,6 +16,14 @@ class Build(
     URL = 'build'
     MODEL_TYPE = 'build'
 
+    def issue(self):
+        """Mark this build as 'issued'."""
+        return self._statusupdate(status='issue')
+    
+    def hold(self):
+        """Mark this build as 'on hold'."""
+        return self._statusupdate(status='hold')
+
     def complete(
         self,
         accept_overallocated='reject',
diff --git a/inventree/purchase_order.py b/inventree/purchase_order.py
index 98907c5..ff59f4e 100644
--- a/inventree/purchase_order.py
+++ b/inventree/purchase_order.py
@@ -65,6 +65,14 @@ def issue(self, **kwargs):
         # Return
         return self._statusupdate(status='issue', **kwargs)
 
+    def hold(self, **kwargs):
+        """
+        Hold the purchase order
+        """
+
+        # Return
+        return self._statusupdate(status='hold', **kwargs)
+
     def receiveAll(self, location, status=10):
         """
         Receive all of the purchase order items, into the given location.
diff --git a/inventree/return_order.py b/inventree/return_order.py
index 0da6226..c5cf324 100644
--- a/inventree/return_order.py
+++ b/inventree/return_order.py
@@ -55,6 +55,10 @@ def issue(self, **kwargs):
         """Issue (send) this order"""
         return self._statusupdate(status='issue', **kwargs)
 
+    def hold(self, **kwargs):
+        """Place this order on hold"""
+        return self._statusupdate(status='hold', **kwargs)
+
     def cancel(self, **kwargs):
         """Cancel this order"""
         return self._statusupdate(status='cancel', **kwargs)
diff --git a/inventree/sales_order.py b/inventree/sales_order.py
index 2d88bdf..e96fadc 100644
--- a/inventree/sales_order.py
+++ b/inventree/sales_order.py
@@ -71,6 +71,18 @@ def addShipment(self, reference, **kwargs):
 
         return SalesOrderShipment.create(self._api, data=kwargs)
 
+    def issue(self, **kwargs):
+        """Issue (send) this order"""
+        return self._statusupdate(status='issue', **kwargs)
+
+    def hold(self, **kwargs):
+        """Place this order on hold"""
+        return self._statusupdate(status='hold', **kwargs)
+
+    def cancel(self, **kwargs):
+        """Cancel this order"""
+        return self._statusupdate(status='cancel', **kwargs)
+
 
 class SalesOrderLineItem(
     inventree.base.InventreeObject,
diff --git a/test/test_build.py b/test/test_build.py
index 8b36109..45929bb 100644
--- a/test/test_build.py
+++ b/test/test_build.py
@@ -122,6 +122,22 @@ def test_build_complete(self):
             }
         )
 
+        # Check that build status is pending
+        self.assertEqual(build.status, 10)
+
+        if self.api.api_version >= 233:
+            # Issue the build order
+            build.issue()
+            self.assertEqual(build.status, 20)
+
+            # Mark build order as "on hold" again
+            build.hold()
+            self.assertEqual(build.status, 25)
+
+            # Issue again
+            build.issue()
+            self.assertEqual(build.status, 20)
+
         # Complete the build, even though it is not completed
         build.complete(accept_unallocated=True, accept_incomplete=True)