diff --git a/packages/bruno-lang/v2/src/bruToJson.js b/packages/bruno-lang/v2/src/bruToJson.js
index baa5b4ead..5c03e8ef4 100644
--- a/packages/bruno-lang/v2/src/bruToJson.js
+++ b/packages/bruno-lang/v2/src/bruToJson.js
@@ -56,7 +56,13 @@ const grammar = ohm.grammar(`Bru {
   // Dictionary Blocks
   dictionary = st* "{" pairlist? tagend
   pairlist = optionalnl* pair (~tagend stnl* pair)* (~tagend space)*
-  pair = st* key st* ":" st* value st*
+  pair = st* (quoted_key | key) st* ":" st* value st*
+  disable_char = "~"
+  quote_char = "\\""
+  esc_char = "\\\\"
+  esc_quote_char = esc_char quote_char
+  quoted_key_char = ~(quote_char | esc_quote_char | nl) any
+  quoted_key = disable_char? quote_char (esc_quote_char | quoted_key_char)* quote_char
   key = keychar*
   value = list | multilinetextblock | valuechar*
 
@@ -301,6 +307,14 @@ const sem = grammar.createSemantics().addAttribute('ast', {
     res[key.ast] = value.ast ? value.ast.trim() : '';
     return res;
   },
+  esc_quote_char(_1, quote) {
+    // unescape
+    return quote.sourceString;
+  },
+  quoted_key(disabled, _1, chars, _2) {
+    // unquote
+    return (disabled? disabled.sourceString : "") + chars.ast.join("");
+  },
   key(chars) {
     return chars.sourceString ? chars.sourceString.trim() : '';
   },
@@ -364,6 +378,9 @@ const sem = grammar.createSemantics().addAttribute('ast', {
   tagend(_1, _2) {
     return '';
   },
+  _terminal(){
+    return this.sourceString;
+  },
   multilinetextblockdelimiter(_) {
     return '';
   },
diff --git a/packages/bruno-lang/v2/src/jsonToBru.js b/packages/bruno-lang/v2/src/jsonToBru.js
index 26de19b51..ec046674a 100644
--- a/packages/bruno-lang/v2/src/jsonToBru.js
+++ b/packages/bruno-lang/v2/src/jsonToBru.js
@@ -4,6 +4,10 @@ const { indentString } = require('./utils');
 
 const enabled = (items = [], key = "enabled") => items.filter((item) => item[key]);
 const disabled = (items = [], key = "enabled") => items.filter((item) => !item[key]);
+const quoteKey = (key) => {
+  const quotableChars = [':', '"', '{', '}', ' '];
+  return quotableChars.some(char => key.includes(char)) ? ('"' + key.replaceAll('"', '\\"') + '"') : key;
+}
 
 // remove the last line if two new lines are found
 const stripLastLine = (text) => {
@@ -121,7 +125,7 @@ const jsonToBru = (json) => {
       if (enabled(queryParams).length) {
         bru += `\n${indentString(
           enabled(queryParams)
-            .map((item) => `${item.name}: ${item.value}`)
+            .map((item) => `${quoteKey(item.name)}: ${item.value}`)
             .join('\n')
         )}`;
       }
@@ -129,7 +133,7 @@ const jsonToBru = (json) => {
       if (disabled(queryParams).length) {
         bru += `\n${indentString(
           disabled(queryParams)
-            .map((item) => `~${item.name}: ${item.value}`)
+            .map((item) => `~${quoteKey(item.name)}: ${item.value}`)
             .join('\n')
         )}`;
       }
@@ -151,7 +155,7 @@ const jsonToBru = (json) => {
     if (enabled(headers).length) {
       bru += `\n${indentString(
         enabled(headers)
-          .map((item) => `${item.name}: ${item.value}`)
+          .map((item) => `${quoteKey(item.name)}: ${item.value}`)
           .join('\n')
       )}`;
     }
@@ -159,7 +163,7 @@ const jsonToBru = (json) => {
     if (disabled(headers).length) {
       bru += `\n${indentString(
         disabled(headers)
-          .map((item) => `~${item.name}: ${item.value}`)
+          .map((item) => `~${quoteKey(item.name)}: ${item.value}`)
           .join('\n')
       )}`;
     }
@@ -246,7 +250,7 @@ ${indentString(`domain: ${auth?.ntlm?.domain || ''}`)}
 }
 
 `;
-  }  
+  }
 
   if (auth && auth.oauth2) {
     switch (auth?.oauth2?.grantType) {
@@ -496,14 +500,14 @@ ${indentString(body.sparql)}
 
     if (enabled(body.formUrlEncoded).length) {
       const enabledValues = enabled(body.formUrlEncoded)
-        .map((item) => `${item.name}: ${getValueString(item.value)}`)
+        .map((item) => `${quoteKey(item.name)}: ${getValueString(item.value)}`)
         .join('\n');
       bru += `${indentString(enabledValues)}\n`;
     }
 
     if (disabled(body.formUrlEncoded).length) {
       const disabledValues = disabled(body.formUrlEncoded)
-        .map((item) => `~${item.name}: ${getValueString(item.value)}`)
+        .map((item) => `~${quoteKey(item.name)}: ${getValueString(item.value)}`)
         .join('\n');
       bru += `${indentString(disabledValues)}\n`;
     }
@@ -524,7 +528,7 @@ ${indentString(body.sparql)}
               item.contentType && item.contentType !== '' ? ' @contentType(' + item.contentType + ')' : '';
 
             if (item.type === 'text') {
-              return `${enabled}${item.name}: ${getValueString(item.value)}${contentType}`;
+              return `${enabled}${quoteKey(item.name)}: ${getValueString(item.value)}${contentType}`;
             }
 
             if (item.type === 'file') {
@@ -532,7 +536,7 @@ ${indentString(body.sparql)}
               const filestr = filepaths.join('|');
 
               const value = `@file(${filestr})`;
-              return `${enabled}${item.name}: ${value}${contentType}`;
+              return `${enabled}${quoteKey(item.name)}: ${value}${contentType}`;
             }
           })
           .join('\n')
diff --git a/packages/bruno-lang/v2/tests/dictionary.spec.js b/packages/bruno-lang/v2/tests/dictionary.spec.js
index dd9ddd472..8e9197576 100644
--- a/packages/bruno-lang/v2/tests/dictionary.spec.js
+++ b/packages/bruno-lang/v2/tests/dictionary.spec.js
@@ -81,6 +81,25 @@ headers {
     expect(output).toEqual(expected);
   });
 
+  it('should parse single header with empty key', () => {
+    const input = `
+headers {
+  : world
+}`;
+
+    const output = parser(input);
+    const expected = {
+      headers: [
+        {
+          name: '',
+          value: 'world',
+          enabled: true
+        }
+      ]
+    };
+    expect(output).toEqual(expected);
+  });
+
   it('should parse multi headers', () => {
     const input = `
 headers {
diff --git a/packages/bruno-lang/v2/tests/fixtures/request.bru b/packages/bruno-lang/v2/tests/fixtures/request.bru
index dc70da54b..c10982f6e 100644
--- a/packages/bruno-lang/v2/tests/fixtures/request.bru
+++ b/packages/bruno-lang/v2/tests/fixtures/request.bru
@@ -17,6 +17,11 @@ get {
 params:query {
   apiKey: secret
   numbers: 998877665
+  "key with spaces": is allowed
+  "colon:parameter": is allowed
+  "nested escaped \"quote\"": is allowed
+  "{braces}": is allowed
+  ~"disabled:colon:parameter": is allowed
   ~message: hello
 }
 
@@ -27,6 +32,11 @@ params:path {
 headers {
   content-type: application/json
   Authorization: Bearer 123
+  "key with spaces": is allowed
+  "colon:header": is allowed
+  "{braces}": is allowed
+  "nested escaped \"quote\"": is allowed
+  ~"disabled:colon:header": is allowed
   ~transaction-id: {{transactionId}}
 }
 
@@ -104,13 +114,23 @@ body:sparql {
 body:form-urlencoded {
   apikey: secret
   numbers: +91998877665
+  "key with spaces": is allowed
+  "colon:parameter": is allowed
+  "nested escaped \"quote\"": is allowed
+  "{braces}": is allowed
   ~message: hello
+  ~"disabled colon:parameter": is allowed
 }
 
 body:multipart-form {
   apikey: secret
   numbers: +91998877665
+  "key with spaces": is allowed
+  "colon:part": is allowed
+  "nested escaped \"quote\"": is allowed
+  "{braces}": is allowed
   ~message: hello
+  ~"disabled colon:part": is allowed
 }
 
 body:file {
diff --git a/packages/bruno-lang/v2/tests/fixtures/request.json b/packages/bruno-lang/v2/tests/fixtures/request.json
index 539eae116..1b6e66497 100644
--- a/packages/bruno-lang/v2/tests/fixtures/request.json
+++ b/packages/bruno-lang/v2/tests/fixtures/request.json
@@ -24,6 +24,36 @@
       "type": "query",
       "enabled": true
     },
+    {
+      "name": "key with spaces",
+      "value": "is allowed",
+      "type": "query",
+      "enabled": true
+    },
+    {
+      "name" : "colon:parameter",
+      "value" : "is allowed",
+      "type": "query",
+      "enabled": true
+    },
+    {
+      "name" : "nested escaped \"quote\"",
+      "value" : "is allowed",
+      "type": "query",
+      "enabled": true
+    },
+    {
+      "name": "{braces}",
+      "value": "is allowed",
+      "type": "query",
+      "enabled": true
+    },
+    {
+      "name" : "disabled:colon:parameter",
+      "value" : "is allowed",
+      "type": "query",
+      "enabled": false
+    },
     {
       "name": "message",
       "value": "hello",
@@ -48,6 +78,31 @@
       "value": "Bearer 123",
       "enabled": true
     },
+    {
+      "name": "key with spaces",
+      "value": "is allowed",
+      "enabled": true
+    },
+    {
+      "name": "colon:header",
+      "value": "is allowed",
+      "enabled": true
+    },
+    {
+      "name": "{braces}",
+      "value": "is allowed",
+      "enabled": true
+    },
+    {
+      "name": "nested escaped \"quote\"",
+      "value": "is allowed",
+      "enabled": true
+    },
+    {
+      "name": "disabled:colon:header",
+      "value": "is allowed",
+      "enabled": false
+    },
     {
       "name": "transaction-id",
       "value": "{{transactionId}}",
@@ -118,10 +173,35 @@
         "value": "+91998877665",
         "enabled": true
       },
+      {
+        "name": "key with spaces",
+        "value": "is allowed",
+        "enabled": true
+      },
+      {
+        "name": "colon:parameter",
+        "value": "is allowed",
+        "enabled": true
+      },
+      {
+        "name": "nested escaped \"quote\"",
+        "value": "is allowed",
+        "enabled": true
+      },
+      {
+        "name": "{braces}",
+        "value": "is allowed",
+        "enabled": true
+      },
       {
         "name": "message",
         "value": "hello",
         "enabled": false
+      },
+      {
+        "name": "disabled colon:parameter",
+        "value": "is allowed",
+        "enabled": false
       }
     ],
     "multipartForm": [
@@ -139,12 +219,47 @@
         "enabled": true,
         "type": "text"
       },
+      {
+        "contentType": "",
+        "name": "key with spaces",
+        "value": "is allowed",
+        "enabled": true,
+        "type": "text"
+      },
+      {
+        "contentType": "",
+        "name": "colon:part",
+        "value": "is allowed",
+        "enabled": true,
+        "type": "text"
+      },
+      {
+        "contentType": "",
+        "name": "nested escaped \"quote\"",
+        "value": "is allowed",
+        "enabled": true,
+        "type": "text"
+      },
+      {
+        "contentType": "",
+        "name": "{braces}",
+        "value": "is allowed",
+        "enabled": true,
+        "type": "text"
+      },
       {
         "contentType": "",
         "name": "message",
         "value": "hello",
         "enabled": false,
         "type": "text"
+      },
+      {
+        "contentType": "",
+        "name": "disabled colon:part",
+        "value": "is allowed",
+        "enabled": false,
+        "type": "text"
       }
     ],
     "file" : [