diff --git a/action.yml b/action.yml
index 6ff369b..0f306b3 100644
--- a/action.yml
+++ b/action.yml
@@ -11,7 +11,6 @@ inputs:
     contentType:
         description: 'Content Type'
         required: false
-        default: 'application/json'
     data:
         description: 'Request Body as JSON String'
         required: false
diff --git a/dist/index.js b/dist/index.js
index 1aab96d..d967b58 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -1342,8 +1342,6 @@ const METHOD_POST = 'POST'
 
 const request = async({ method, instanceConfig, data, files, auth, actions, preventFailureOnNoResponse, escapeData }) => {
   try {
-    const instance = axios.create(instanceConfig);
-
     if (escapeData) {
       data = data.replace(/"[^"]*"/g, (match) => { 
           return match.replace(/[\n\r]\s*/g, "\\n");
@@ -1375,6 +1373,10 @@ const request = async({ method, instanceConfig, data, files, auth, actions, prev
       data
     }
 
+    actions.debug('Instance Configuration: ' + JSON.stringify(instanceConfig))
+    
+    const instance = axios.create(instanceConfig);
+
     actions.debug('Request Data: ' + JSON.stringify(requestData))
 
     const response = await instance.request(requestData)
@@ -1421,12 +1423,18 @@ const convertToFormData = (data, files) => {
 
 const updateConfig = async (instanceConfig, formData, actions) => {
   try {
+    const formHeaders = formData.getHeaders()
+    const contentType = formHeaders['content-type']
+
+    delete formHeaders['content-type']
+
     return { 
       ...instanceConfig, 
       headers: { 
         ...instanceConfig.headers, 
-        ...formData.getHeaders(), 
-        'Content-Length': await contentLength(formData) 
+        ...formHeaders,
+        'Content-Length': await contentLength(formData),
+        'Content-Type': contentType
       }
     }
   } catch(error) {
@@ -3561,8 +3569,6 @@ const instanceConfig = {
   headers: { ...headers, ...customHeaders }
 }
 
-core.debug('Instance Configuration: ' + JSON.stringify(instanceConfig))
-
 const data = core.getInput('data') || '{}';
 const files = core.getInput('files') || '{}';
 const method = core.getInput('method') || METHOD_POST;
diff --git a/src/httpClient.js b/src/httpClient.js
index 2c44d1f..1c2acd0 100644
--- a/src/httpClient.js
+++ b/src/httpClient.js
@@ -7,8 +7,6 @@ const METHOD_POST = 'POST'
 
 const request = async({ method, instanceConfig, data, files, auth, actions, preventFailureOnNoResponse, escapeData }) => {
   try {
-    const instance = axios.create(instanceConfig);
-
     if (escapeData) {
       data = data.replace(/"[^"]*"/g, (match) => { 
           return match.replace(/[\n\r]\s*/g, "\\n");
@@ -40,6 +38,10 @@ const request = async({ method, instanceConfig, data, files, auth, actions, prev
       data
     }
 
+    actions.debug('Instance Configuration: ' + JSON.stringify(instanceConfig))
+    
+    const instance = axios.create(instanceConfig);
+
     actions.debug('Request Data: ' + JSON.stringify(requestData))
 
     const response = await instance.request(requestData)
@@ -86,12 +88,18 @@ const convertToFormData = (data, files) => {
 
 const updateConfig = async (instanceConfig, formData, actions) => {
   try {
+    const formHeaders = formData.getHeaders()
+    const contentType = formHeaders['content-type']
+
+    delete formHeaders['content-type']
+
     return { 
       ...instanceConfig, 
       headers: { 
         ...instanceConfig.headers, 
-        ...formData.getHeaders(), 
-        'Content-Length': await contentLength(formData) 
+        ...formHeaders,
+        'Content-Length': await contentLength(formData),
+        'Content-Type': contentType
       }
     }
   } catch(error) {
diff --git a/src/index.js b/src/index.js
index 7427033..a068bb1 100644
--- a/src/index.js
+++ b/src/index.js
@@ -34,8 +34,6 @@ const instanceConfig = {
   headers: { ...headers, ...customHeaders }
 }
 
-core.debug('Instance Configuration: ' + JSON.stringify(instanceConfig))
-
 const data = core.getInput('data') || '{}';
 const files = core.getInput('files') || '{}';
 const method = core.getInput('method') || METHOD_POST;