diff --git a/README.md b/README.md
index aec13e8..3ecfd9f 100644
--- a/README.md
+++ b/README.md
@@ -27,6 +27,7 @@ jobs:
 |username| Username for Basic Auth ||
 |password| Password for Basic Auth ||
 |bearerToken| Bearer Authentication Token (without Bearer Prefix) ||
+|customHeaders| Additional header values as JSON string, keys in this object overwrite default headers like Content-Type |'{}'|
 
 ### Output
 
diff --git a/src/index.js b/src/index.js
index 5bf5abf..940b29d 100644
--- a/src/index.js
+++ b/src/index.js
@@ -2,6 +2,16 @@ const core = require("@actions/core");
 const axios = require("axios");
 
 const auth = {}
+let customHeaders = {}
+
+if (!!core.getInput('customHeaders')) {
+  try {
+    customHeaders = JSON.parse(core.getInput('customHeaders'));
+  } catch(error) {
+    core.error('Could not parse customHeaders string value')
+  }
+}
+
 const headers = { 'Content-Type': core.getInput('contentType') || 'application/json' }
 
 if (!!core.getInput('username')) {
@@ -19,7 +29,7 @@ if (!!core.getInput('bearerToken')) {
 const instance = axios.create({
   baseURL: core.getInput('url', { required: true }),
   timeout: parseInt(core.getInput('timeout') || 5000, 10),
-  headers
+  headers: { ...headers, ...customHeaders }
 });