diff --git a/packages/data/src/ethers.test.ts b/packages/data/src/ethers.test.ts
index 0c8294a85..1b40fdacf 100644
--- a/packages/data/src/ethers.test.ts
+++ b/packages/data/src/ethers.test.ts
@@ -28,7 +28,7 @@ describe("SemaphoreEthers", () => {
         it("Should instantiate a SemaphoreEthers object with different networks", () => {
             semaphore = new SemaphoreEthers()
             const semaphore1 = new SemaphoreEthers("arbitrum")
-            const semaphore2 = new SemaphoreEthers("matic")
+            const semaphore2 = new SemaphoreEthers("mumbai")
             const semaphore3 = new SemaphoreEthers("optimism-goerli")
             const semaphore4 = new SemaphoreEthers("arbitrum-goerli")
             const semaphore5 = new SemaphoreEthers("arbitrum-goerli", {
diff --git a/packages/data/src/ethers.ts b/packages/data/src/ethers.ts
index 6cb96b673..1f0e6c357 100644
--- a/packages/data/src/ethers.ts
+++ b/packages/data/src/ethers.ts
@@ -37,7 +37,7 @@ export default class SemaphoreEthers {
             checkParameter(options.apiKey, "apiKey", "string")
         }
 
-        if (networkOrEthereumURL === "matic") {
+        if (networkOrEthereumURL === "mumbai") {
             networkOrEthereumURL = "maticmum"
         }