diff --git a/src/adapters/Authentication/index.test.ts b/src/adapters/Authentication/index.test.ts
index da15b34..e1aeb80 100644
--- a/src/adapters/Authentication/index.test.ts
+++ b/src/adapters/Authentication/index.test.ts
@@ -1,7 +1,7 @@
 import { post } from 'adapters/Base';
 import { config } from 'config';
 
-import { signIn } from '.';
+import { refreshToken, signIn } from '.';
 
 jest.mock('adapters/Base');
 jest.mock('config');
@@ -40,4 +40,24 @@ describe('AuthenticationAdapter', () => {
       });
     });
   });
+
+  describe('refreshToken', () => {
+    describe('given a refresh token', () => {
+      it('calls the post method from the base adapter', () => {
+        const token = 'refresh token';
+
+        const expectedPath = 'oauth/token';
+        const expectedPayload = {
+          grantType: 'refresh_token',
+          clientId: config().clientId,
+          clientSecret: config().clientSecret,
+          refreshToken: token,
+        };
+
+        refreshToken(token);
+
+        expect(post).toHaveBeenCalledWith(expectedPath, expectedPayload);
+      });
+    });
+  });
 });
diff --git a/src/adapters/Authentication/index.ts b/src/adapters/Authentication/index.ts
index bbc6194..1cb4cc4 100644
--- a/src/adapters/Authentication/index.ts
+++ b/src/adapters/Authentication/index.ts
@@ -9,3 +9,11 @@ export const signIn = (email: string, password: string) =>
     email: email,
     password: password,
   });
+
+export const refreshToken = (refreshToken: string) =>
+  post('oauth/token', {
+    clientId: config().clientId,
+    clientSecret: config().clientSecret,
+    grantType: 'refresh_token',
+    refreshToken: refreshToken,
+  });