diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2f10a60..c2873b7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,16 @@
+# v2.8.1 (Thu Oct 02 2025)
+
+#### 🐛 Bug Fix
+
+- Add missing Content-Type header to POST requests to fix 422 errors ([@damianjachyra](https://github.com/damianjachyra))
+- Fix header casing from X-Magic-Secret-key to X-Magic-Secret-Key ([@damianjachyra](https://github.com/damianjachyra))
+
+#### Authors: 1
+
+- Damian Jachyra ([@damianjachyra](https://github.com/damianjachyra))
+
+---
+
 # v2.8.0 (Fri Sep 12 2025)
 
 #### 🚀 Enhancement
diff --git a/src/utils/rest.ts b/src/utils/rest.ts
index 69b6d9a..176d8b8 100644
--- a/src/utils/rest.ts
+++ b/src/utils/rest.ts
@@ -38,7 +38,10 @@ export function post<TBody extends Record<string, string | number | boolean>, TR
 ) {
   return emitRequest<TResponse>(url, {
     method: 'POST',
-    headers: { 'X-Magic-Secret-key': secretApiKey },
+    headers: { 
+      'X-Magic-Secret-Key': secretApiKey,
+      'Content-Type': 'application/json'
+    },
     body: JSON.stringify(body),
   });
 }
@@ -50,6 +53,6 @@ export function get<TResponse>(url: string, secretApiKey: string, params?: any)
   const urlWithParams = generateQuery(url, params);
   return emitRequest<TResponse>(urlWithParams, {
     method: 'GET',
-    headers: { 'X-Magic-Secret-key': secretApiKey },
+    headers: { 'X-Magic-Secret-Key': secretApiKey },
   });
 }
diff --git a/test/spec/utils/rest/get.spec.ts b/test/spec/utils/rest/get.spec.ts
index e87f69d..175bc9c 100644
--- a/test/spec/utils/rest/get.spec.ts
+++ b/test/spec/utils/rest/get.spec.ts
@@ -21,7 +21,7 @@ test('Successfully GETs to the given endpoint & stringifies query params', async
     'https://example.com/hello/world?foo=hello&bar=world',
     {
       method: 'GET',
-      headers: { 'X-Magic-Secret-key': API_KEY },
+      headers: { 'X-Magic-Secret-Key': API_KEY },
     },
   ]);
 });
@@ -39,7 +39,7 @@ test('Successfully GETs to the given endpoint with no query params', async () =>
     'https://example.com/hello/world',
     {
       method: 'GET',
-      headers: { 'X-Magic-Secret-key': API_KEY },
+      headers: { 'X-Magic-Secret-Key': API_KEY },
     },
   ]);
 });
diff --git a/test/spec/utils/rest/post.spec.ts b/test/spec/utils/rest/post.spec.ts
index 5e71e76..a358673 100644
--- a/test/spec/utils/rest/post.spec.ts
+++ b/test/spec/utils/rest/post.spec.ts
@@ -26,7 +26,10 @@ test('Successfully POSTs to the given endpoint & stringifies body', async () =>
     'https://example.com/hello/world',
     {
       method: 'POST',
-      headers: { 'X-Magic-Secret-key': API_KEY },
+      headers: { 
+        'X-Magic-Secret-Key': API_KEY,
+        'Content-Type': 'application/json'
+      },
       body: '{"public_address":"0x0123"}',
     },
   ]);