diff --git a/package-lock.json b/package-lock.json
index 0afeb7c..b8947a7 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "lightrail-client",
-  "version": "4.2.2",
+  "version": "4.3.0",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index fe57e8b..2d77fa2 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lightrail-client",
-  "version": "4.2.2",
+  "version": "4.3.0",
   "description": "A Javascript and Typescript client for Lightrail",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",
diff --git a/src/index.ts b/src/index.ts
index 40182a5..6413e51 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -92,7 +92,7 @@ export function request(method: string, path: string): superagent.Request {
     }
     if (!configuration.isBrowser) {
         // TODO@Dan Review Previous import of package.json to dynamically set this was breaking publish (dist included src/ & package.json file)
-        r.set("User-Agent", "Lightrail-JavaScript/4.2.2");
+        r.set("User-Agent", "Lightrail-JavaScript/4.3.0");
     }
     if (configuration.isBrowser) {
         r.set("X-Requested-With", "XMLHttpRequest");
diff --git a/src/model/DiscountSellerLiabilityRule.ts b/src/model/DiscountSellerLiabilityRule.ts
new file mode 100644
index 0000000..e36a1d8
--- /dev/null
+++ b/src/model/DiscountSellerLiabilityRule.ts
@@ -0,0 +1,4 @@
+export interface DiscountSellerLiabilityRule {
+    rule: string;
+    explanation: string;
+}
diff --git a/src/model/Program.ts b/src/model/Program.ts
index fdb0a9f..0e0d68b 100644
--- a/src/model/Program.ts
+++ b/src/model/Program.ts
@@ -1,12 +1,15 @@
 import {BalanceRule} from "./BalanceRule";
 import {RedemptionRule} from "./RedemptionRule";
+import {DiscountSellerLiabilityRule} from "./DiscountSellerLiabilityRule";
 
 export interface Program {
     id: string;
     name: string;
     currency: string;
     discount: boolean;
+    /** @deprecated since v4.3.0 - use DiscountSellerLiabilityRule instead. */
     discountSellerLiability: number;
+    discountSellerLiabilityRule: DiscountSellerLiabilityRule;
     pretax: boolean;
     active: boolean;
     redemptionRule: RedemptionRule;
diff --git a/src/model/Value.ts b/src/model/Value.ts
index 98e2127..dc1c0d5 100644
--- a/src/model/Value.ts
+++ b/src/model/Value.ts
@@ -1,6 +1,7 @@
 import {BalanceRule} from "./BalanceRule";
 import {RedemptionRule} from "./RedemptionRule";
 import {GenericCodeOptions} from "./GenericCodeOptions";
+import {DiscountSellerLiabilityRule} from "./DiscountSellerLiabilityRule";
 
 export interface Value {
     id: string;
@@ -20,7 +21,9 @@ export interface Value {
     canceled: boolean;
     redemptionRule: RedemptionRule;
     discount: boolean;
+    /** @deprecated since v4.3.0 - use DiscountSellerLiabilityRule instead. */
     discountSellerLiability: number;
+    discountSellerLiabilityRule: DiscountSellerLiabilityRule;
     startDate: string;
     endDate: string;
     tags: string[];
diff --git a/src/model/index.ts b/src/model/index.ts
index a28ff2c..2959fcd 100644
--- a/src/model/index.ts
+++ b/src/model/index.ts
@@ -7,3 +7,4 @@ export * from "./RedemptionRule";
 export * from "./Transaction";
 export * from "./Value";
 export * from "./GenericCodeOptions";
+export * from "./DiscountSellerLiabilityRule";
diff --git a/src/params/programs/CreateProgramParams.ts b/src/params/programs/CreateProgramParams.ts
index 38da3b9..088ed0d 100644
--- a/src/params/programs/CreateProgramParams.ts
+++ b/src/params/programs/CreateProgramParams.ts
@@ -1,14 +1,17 @@
 import {Program} from "../../model";
 import {LightrailResponse} from "../LightrailResponse";
-import {BalanceRule} from "../../model/BalanceRule";
-import {RedemptionRule} from "../../model/RedemptionRule";
+import {BalanceRule} from "../../model";
+import {RedemptionRule} from "../../model";
+import {DiscountSellerLiabilityRule} from "../../model";
 
 export interface CreateProgramParams {
     id: string;
     currency: string;
     name: string;
     discount?: boolean;
+    /** @deprecated since v4.3.0 - use DiscountSellerLiabilityRule instead. */
     discountSellerLiability?: number;
+    discountSellerLiabilityRule?: DiscountSellerLiabilityRule;
     pretax?: boolean;
     active?: boolean;
     redemptionRule?: RedemptionRule;
diff --git a/src/params/programs/UpdateProgramParams.ts b/src/params/programs/UpdateProgramParams.ts
index e93f37a..0e82655 100644
--- a/src/params/programs/UpdateProgramParams.ts
+++ b/src/params/programs/UpdateProgramParams.ts
@@ -1,10 +1,13 @@
 import {BalanceRule, Program, RedemptionRule} from "../../model";
 import {LightrailResponse} from "../LightrailResponse";
+import {DiscountSellerLiabilityRule} from "../../model";
 
 export interface UpdateProgramParams {
     name?: string;
     discount?: boolean;
+    /** @deprecated since v4.3.0 - use DiscountSellerLiabilityRule instead. */
     discountSellerLiability?: number;
+    discountSellerLiabilityRule?: DiscountSellerLiabilityRule;
     pretax?: boolean;
     active?: boolean;
     redemptionRule?: RedemptionRule;
diff --git a/src/params/values/CreateValueParams.ts b/src/params/values/CreateValueParams.ts
index c5e470d..0a7c074 100644
--- a/src/params/values/CreateValueParams.ts
+++ b/src/params/values/CreateValueParams.ts
@@ -1,8 +1,9 @@
-import {Value} from "../../model/Value";
+import {Value} from "../../model";
 import {LightrailResponse} from "../LightrailResponse";
-import {BalanceRule} from "../../model/BalanceRule";
-import {RedemptionRule} from "../../model/RedemptionRule";
-import {GenericCodeOptions} from "../../model/GenericCodeOptions";
+import {BalanceRule} from "../../model";
+import {RedemptionRule} from "../../model";
+import {GenericCodeOptions} from "../../model";
+import {DiscountSellerLiabilityRule} from "../../model";
 
 export interface CreateValueParams {
     id: string;
@@ -15,7 +16,9 @@ export interface CreateValueParams {
     active?: boolean;
     frozen?: boolean;
     discount?: boolean;
+    /** @deprecated since v4.3.0 - use DiscountSellerLiabilityRule instead. */
     discountSellerLiability?: number;
+    discountSellerLiabilityRule?: DiscountSellerLiabilityRule;
     genericCodeOptions?: GenericCodeOptions;
     redemptionRule?: RedemptionRule;
     balanceRule?: BalanceRule;
diff --git a/src/params/values/UpdateValueParams.ts b/src/params/values/UpdateValueParams.ts
index 9dbb495..3e3b55b 100644
--- a/src/params/values/UpdateValueParams.ts
+++ b/src/params/values/UpdateValueParams.ts
@@ -1,7 +1,8 @@
 import {LightrailResponse} from "../LightrailResponse";
-import {Value} from "../../model/Value";
-import {BalanceRule} from "../../model/BalanceRule";
-import {RedemptionRule} from "../../model/RedemptionRule";
+import {Value} from "../../model";
+import {BalanceRule} from "../../model";
+import {RedemptionRule} from "../../model";
+import {DiscountSellerLiabilityRule} from "../../model";
 
 export interface UpdateValueParams {
     contactId?: string;
@@ -12,7 +13,9 @@ export interface UpdateValueParams {
     redemptionRule?: RedemptionRule;
     balanceRule?: BalanceRule;
     discount?: boolean;
+    /** @deprecated since v4.3.0 - use DiscountSellerLiabilityRule instead. */
     discountSellerLiability?: number;
+    discountSellerLiabilityRule?: DiscountSellerLiabilityRule;
     startDate?: string;
     endDate?: string;
     tags?: string[];
diff --git a/src/programs.test.ts b/src/programs.test.ts
index a5f9f3d..1541f56 100644
--- a/src/programs.test.ts
+++ b/src/programs.test.ts
@@ -23,8 +23,7 @@ describe("programs", () => {
                 id: testID,
                 name: "javascript programs unit test",
                 currency: "USD",
-                discount: false,
-                discountSellerLiability: null,
+                discount: true,
                 pretax: false,
                 active: true,
                 redemptionRule: {
@@ -35,6 +34,10 @@ describe("programs", () => {
                     rule: "100",
                     explanation: "$1",
                 },
+                discountSellerLiabilityRule: {
+                    rule: "0.5",
+                    explanation: "seller is 50% liable"
+                },
                 minInitialBalance: null, // must be null if balanceRule
                 maxInitialBalance: null, // must be null if balanceRule
                 fixedInitialBalances: null, // must be null if balanceRule
@@ -47,9 +50,9 @@ describe("programs", () => {
             };
             const program = await Lightrail.programs.createProgram(request);
             chai.assert.isNotNull(program);
-            chai.assert.deepEqualExcluding(program.body, request,
+            chai.assert.deepEqualExcluding(program.body, {...request, discountSellerLiability: 0.5},
                 [
-                    "startDate", "endDate", "createdBy", "createdDate", "updatedDate"
+                    "startDate", "endDate", "createdBy", "createdDate", "updatedDate",
                 ] as any);
         });
     });
diff --git a/src/values.test.ts b/src/values.test.ts
index 960de97..66fc90b 100644
--- a/src/values.test.ts
+++ b/src/values.test.ts
@@ -26,11 +26,14 @@ describe("values", () => {
         frozen: false,
         discount: true,
         pretax: true,
-        discountSellerLiability: 1,
         redemptionRule: {
             rule: "1 == 1",
             explanation: "true"
         },
+        discountSellerLiabilityRule: {
+            rule: "0.5",
+            explanation: "seller is 50% liable"
+        },
         balanceRule: null,
         usesRemaining: 1,
         startDate: new Date("3030-01-01").toISOString(),
@@ -45,9 +48,9 @@ describe("values", () => {
             const value = await Lightrail.values.createValue(testValue);
 
             chai.assert.isNotNull(value);
-            chai.assert.deepEqualExcluding(value.body, testValue,
+            chai.assert.deepEqualExcluding(value.body, {...testValue, discountSellerLiability: 0.5},
                 [
-                    "startDate", "endDate", "createdBy", "createdDate", "updatedDate", "code", "issuanceId", "updatedContactIdDate", "canceled", "programId"
+                    "startDate", "endDate", "createdBy", "createdDate", "updatedDate", "code", "issuanceId", "updatedContactIdDate", "canceled", "programId",
                 ] as any);
         });
     });