diff --git a/unit-2-apis/topic-10-jwt/side-unit/book-1/04.04.md b/unit-2-apis/topic-10-jwt/side-unit/book-1/04.04.md
index c3b5c1e..5c28b35 100644
--- a/unit-2-apis/topic-10-jwt/side-unit/book-1/04.04.md
+++ b/unit-2-apis/topic-10-jwt/side-unit/book-1/04.04.md
@@ -48,12 +48,12 @@ In our test infrastructure, extend playtime-service to include new methods to au
 ~~~javascript
   async authenticate(user) {
     const response = await axios.post(`${this.playtimeUrl}/api/users/authenticate`, user);
-    axios.defaults.headers.common["Authorization"] = "Bearer " + response.data.token;
+    axios.defaults.headers.common.Authorization = `Bearer ${response.data.token}`;
     return response.data;
   },
 
   async clearAuth() {
-    axios.defaults.headers.common["Authorization"] = "";
+    axios.defaults.headers.common.Authorization = "";
   }
 ~~~