diff --git a/static/oas/Codat-Accounting.json b/static/oas/Codat-Accounting.json
index b7d49b295..a725fb65b 100644
--- a/static/oas/Codat-Accounting.json
+++ b/static/oas/Codat-Accounting.json
@@ -141558,7 +141558,8 @@
               },
               "accountRef": {
                 "$ref": "#/components/schemas/Account/definitions/accountRef",
-                "description": "Reference to the account to which the line item is linked."
+                "description": "Reference to the account to which the line item is linked.",
+                "nullable": true
               },
               "taxRateRef": {
                 "$ref": "#/components/schemas/TaxRate/definitions/taxRateRef",
@@ -141593,11 +141594,7 @@
                 "type": "boolean",
                 "description": "The bill is a direct cost if `True`."
               }
-            },
-            "required": [
-              "unitAmount",
-              "quantity"
-            ]
+            }
           }
         }
       },
diff --git a/static/oas/Codat-Lending.json b/static/oas/Codat-Lending.json
index 3a4632d8f..06c73992e 100644
--- a/static/oas/Codat-Lending.json
+++ b/static/oas/Codat-Lending.json
@@ -112010,7 +112010,8 @@
               },
               "accountRef": {
                 "$ref": "#/components/schemas/AccountingAccount/definitions/accountRef",
-                "description": "Reference to the account to which the line item is linked."
+                "description": "Reference to the account to which the line item is linked.",
+                "nullable": true
               },
               "taxRateRef": {
                 "$ref": "#/components/schemas/AccountingBillCreditNote/definitions/billCreditNoteLineItem/properties/taxRateRef",
@@ -112066,11 +112067,7 @@
                 "type": "boolean",
                 "description": "The bill is a direct cost if `True`."
               }
-            },
-            "required": [
-              "unitAmount",
-              "quantity"
-            ]
+            }
           }
         }
       },
diff --git a/static/oas/Codat-Sync-Payables-v1.json b/static/oas/Codat-Sync-Payables-v1.json
index 663810520..3f3fc0468 100644
--- a/static/oas/Codat-Sync-Payables-v1.json
+++ b/static/oas/Codat-Sync-Payables-v1.json
@@ -44887,7 +44887,8 @@
               },
               "accountRef": {
                 "$ref": "#/components/schemas/Account/definitions/accountRef",
-                "description": "Reference to the account to which the line item is linked."
+                "description": "Reference to the account to which the line item is linked.",
+                "nullable": true
               },
               "taxRateRef": {
                 "$ref": "#/components/schemas/TaxRate/definitions/taxRateRef",
@@ -44943,11 +44944,7 @@
                 "type": "boolean",
                 "description": "The bill is a direct cost if `True`."
               }
-            },
-            "required": [
-              "unitAmount",
-              "quantity"
-            ]
+            }
           }
         }
       },