diff --git a/package.json b/package.json
index e6bce97..debd4e6 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@orionprotocol/sdk",
-  "version": "0.20.88-rc3",
+  "version": "0.20.88-rc4",
   "description": "Orion Protocol SDK",
   "main": "./lib/index.cjs",
   "module": "./lib/index.js",
diff --git a/src/config/chains.json b/src/config/chains.json
index 3fecfd8..3607a21 100644
--- a/src/config/chains.json
+++ b/src/config/chains.json
@@ -77,6 +77,19 @@
       "curveRegistry": ""
     }
   },
+  "11155111": {
+    "chainId": "11155111",
+    "explorer": "https://sepolia.etherscan.io/",
+    "label": "Sepolia",
+    "shortName": "ETH-Sepolia",
+    "code": "eth",
+    "rpc": "https://gateway.tenderly.co/public/sepolia",
+    "baseCurrencyName": "ETH",
+    "contracts": {
+      "WETH": "",
+      "curveRegistry": ""
+    }
+  },
   "421613": {
     "chainId": "421613",
     "explorer": "https://goerli.arbiscan.io/",
diff --git a/src/config/envs.json b/src/config/envs.json
index c5870d7..adaf1ce 100644
--- a/src/config/envs.json
+++ b/src/config/envs.json
@@ -227,8 +227,8 @@
         },
         "liquidityMigratorAddress": "0x01b10dds12478C88A5E18e2707E729906bC25CfF6"
       },
-      "5": {
-        "api": "https://testing.orion.xyz/eth-goerli",
+      "11155111": {
+        "api": "https://testing.orion.xyz/eth-sepolia",
         "services": {
           "aggregator": {
             "http": "/backend",
diff --git a/src/constants/chains.ts b/src/constants/chains.ts
index 1fb8ff3..df0bd2f 100644
--- a/src/constants/chains.ts
+++ b/src/constants/chains.ts
@@ -4,6 +4,7 @@ export const developmentChains = [
   SupportedChainId.BSC_TESTNET,
   SupportedChainId.ROPSTEN,
   SupportedChainId.GOERLI,
+  SupportedChainId.SEPOLIA,
   SupportedChainId.ARBITRUM_GOERLI,
   SupportedChainId.FANTOM_TESTNET,
   SupportedChainId.POLYGON_TESTNET,
diff --git a/src/types.ts b/src/types.ts
index a9b6559..946675a 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -82,8 +82,6 @@ export type Pair = {
 
 export enum SupportedChainId {
   MAINNET = '1',
-  ROPSTEN = '3',
-  GOERLI = '5',
   ARBITRUM = '42161',
   FANTOM_OPERA = '250',
   POLYGON = '137',
@@ -94,6 +92,9 @@ export enum SupportedChainId {
   AVAX = '43114',
   BASE = '8453',
 
+  ROPSTEN = '3',
+  GOERLI = '5',
+  SEPOLIA = '11155111',
   POLYGON_TESTNET = '80001',
   FANTOM_TESTNET = '4002',
   BSC = '56',