diff --git a/.changeset/bright-plants-lick.md b/.changeset/bright-plants-lick.md
new file mode 100644
index 000000000..ed13272ea
--- /dev/null
+++ b/.changeset/bright-plants-lick.md
@@ -0,0 +1,5 @@
+---
+"@bigcommerce/catalyst-core": patch
+---
+
+add update customer mutation
diff --git a/apps/core/client/mutations/update-customer.ts b/apps/core/client/mutations/update-customer.ts
new file mode 100644
index 000000000..d45c78a13
--- /dev/null
+++ b/apps/core/client/mutations/update-customer.ts
@@ -0,0 +1,56 @@
+import { getSessionCustomerId } from '~/auth';
+
+import { client } from '..';
+import { graphql, VariablesOf } from '../graphql';
+
+const UPDATE_CUSTOMER_MUTATION = graphql(`
+  mutation updateCustomer($input: UpdateCustomerInput!) {
+    customer {
+      updateCustomer(input: $input) {
+        customer {
+          firstName
+          lastName
+        }
+        errors {
+          __typename
+          ... on EmailAlreadyInUseError {
+            message
+          }
+          ... on ValidationError {
+            message
+          }
+          ... on CustomerDoesNotExistError {
+            message
+          }
+          ... on CustomerNotLoggedInError {
+            message
+          }
+        }
+      }
+    }
+  }
+`);
+
+type Variables = VariablesOf<typeof UPDATE_CUSTOMER_MUTATION>;
+type Input = Variables['input'];
+
+interface UpdateCustomer {
+  formFields: Input;
+  reCaptchaToken?: string;
+}
+
+export const updateCustomer = async ({ formFields, reCaptchaToken }: UpdateCustomer) => {
+  const customerId = await getSessionCustomerId();
+
+  const response = await client.fetch({
+    document: UPDATE_CUSTOMER_MUTATION,
+    customerId,
+    fetchOptions: { cache: 'no-store' },
+    variables: {
+      input: formFields,
+      ...(reCaptchaToken && { reCaptchaV2: { token: reCaptchaToken } }),
+    },
+  });
+
+  return response.data.customer.updateCustomer;
+};