diff --git a/packages/bruno-cli/src/runner/interpolate-vars.js b/packages/bruno-cli/src/runner/interpolate-vars.js
index 0253c10cd..2b727e671 100644
--- a/packages/bruno-cli/src/runner/interpolate-vars.js
+++ b/packages/bruno-cli/src/runner/interpolate-vars.js
@@ -74,17 +74,17 @@ const interpolateVars = (request, envVars = {}, runtimeVariables = {}, processEn
   } else if (contentType === 'application/x-www-form-urlencoded') {
     if (typeof request.data === 'object') {
       try {
-        let parsed = JSON.stringify(request.data);
-        parsed = _interpolate(parsed);
-        request.data = JSON.parse(parsed);
+        forOwn(request?.data, (value, key) => {
+          request.data[key] = _interpolate(value);
+        });
       } catch (err) {}
     }
   } else if (contentType === 'multipart/form-data') {
     if (typeof request.data === 'object' && !(request?.data instanceof FormData)) {
       try {
-        let parsed = JSON.stringify(request.data);
-        parsed = _interpolate(parsed);
-        request.data = JSON.parse(parsed);
+        forOwn(request?.data, (value, key) => {
+          request.data[key] = _interpolate(value);
+        });
       } catch (err) {}
     }
   } else {
diff --git a/packages/bruno-electron/src/ipc/network/interpolate-vars.js b/packages/bruno-electron/src/ipc/network/interpolate-vars.js
index e60d52428..99b0191cd 100644
--- a/packages/bruno-electron/src/ipc/network/interpolate-vars.js
+++ b/packages/bruno-electron/src/ipc/network/interpolate-vars.js
@@ -78,17 +78,17 @@ const interpolateVars = (request, envVariables = {}, runtimeVariables = {}, proc
   } else if (contentType === 'application/x-www-form-urlencoded') {
     if (typeof request.data === 'object') {
       try {
-        let parsed = JSON.stringify(request.data);
-        parsed = _interpolate(parsed);
-        request.data = JSON.parse(parsed);
+        forOwn(request?.data, (value, key) => {
+          request.data[key] = _interpolate(value);
+        });
       } catch (err) {}
     }
   } else if (contentType === 'multipart/form-data') {
     if (typeof request.data === 'object' && !(request.data instanceof FormData)) {
       try {
-        let parsed = JSON.stringify(request.data);
-        parsed = _interpolate(parsed);
-        request.data = JSON.parse(parsed);
+        forOwn(request?.data, (value, key) => {
+          request.data[key] = _interpolate(value);
+        });        
       } catch (err) {}
     }
   } else {
diff --git a/packages/bruno-tests/collection/echo/echo form-url-encoded.bru b/packages/bruno-tests/collection/echo/echo form-url-encoded.bru
index a0d2f0afb..7c0ce77eb 100644
--- a/packages/bruno-tests/collection/echo/echo form-url-encoded.bru	
+++ b/packages/bruno-tests/collection/echo/echo form-url-encoded.bru	
@@ -12,12 +12,15 @@ post {
 
 body:form-urlencoded {
   form-data-key: {{form-data-key}}
-}
-
-script:pre-request {
-  bru.setVar('form-data-key', 'form-data-value');
+  form-data-stringified-object: {{form-data-stringified-object}}
 }
 
 assert {
-  res.body: eq form-data-key=form-data-value
+  res.body: eq form-data-key=form-data-value&form-data-stringified-object=%7B%22foo%22%3A123%7D
+}
+
+script:pre-request {
+  let obj = JSON.stringify({foo:123});
+  bru.setVar('form-data-key', 'form-data-value');
+  bru.setVar('form-data-stringified-object', obj);
 }
diff --git a/packages/bruno-tests/collection/echo/echo multipart.bru b/packages/bruno-tests/collection/echo/echo multipart.bru
index b8fd8abf7..1edb2ca8a 100644
--- a/packages/bruno-tests/collection/echo/echo multipart.bru	
+++ b/packages/bruno-tests/collection/echo/echo multipart.bru	
@@ -11,14 +11,18 @@ post {
 }
 
 body:multipart-form {
-  foo: {{form-data-key}}
+  form-data-key: {{form-data-key}}
+  form-data-stringified-object: {{form-data-stringified-object}}
   file: @file(bruno.png)
 }
 
 assert {
   res.body: contains form-data-value
+  res.body: contains {"foo":123}
 }
 
 script:pre-request {
+  let obj = JSON.stringify({foo:123});
   bru.setVar('form-data-key', 'form-data-value');
+  bru.setVar('form-data-stringified-object', obj);
 }