diff --git a/_locales/en/messages.json b/_locales/en/messages.json
index fa3979ac..d59ac3a1 100644
--- a/_locales/en/messages.json
+++ b/_locales/en/messages.json
@@ -930,5 +930,13 @@
   "google_gemini_empty_model": {
     "message": "You've not choosen a model for the Google Gemini API. Please choose one in the options page.",
     "description": ""
+  },
+  "GoogleGemini_SystemInstruction": {
+    "message": "System Instruction",
+    "description": ""
+  },
+  "GoogleGemini_SystemInstruction_Info": {
+    "message": "When you set a system instruction, you give the model additional context to understand the task, provide more customized responses, and adhere to specific guidelines over the prompt that will be sent.",
+    "description": ""
   }
 }
\ No newline at end of file
diff --git a/options/mzta-options-default.js b/options/mzta-options-default.js
index 0b93de08..003f42c6 100644
--- a/options/mzta-options-default.js
+++ b/options/mzta-options-default.js
@@ -35,6 +35,7 @@ export const prefs_default = {
     openai_comp_chat_name: 'OpenAI Comp',
     google_gemini_api_key: '',
     google_gemini_model: '',
+    google_gemini_system_instruction: '',
     dynamic_menu_force_enter: false,
     dynamic_menu_order_alphabet: true,
     placeholders_use_default_value: false,
diff --git a/options/mzta-options.html b/options/mzta-options.html
index 5790b670..3c505881 100644
--- a/options/mzta-options.html
+++ b/options/mzta-options.html
@@ -202,6 +202,19 @@
           </label>
         </td>
       </tr>
+      <tr class="conntype_google_gemini_api">
+        <td>
+          <label>
+            <span>__MSG_GoogleGemini_SystemInstruction__</span>
+          </label>
+        </td>
+        <td>
+          <label>
+            <textarea id="google_gemini_system_instruction" name="google_gemini_system_instruction" class="option-input"></textarea>
+            <br>__MSG_GoogleGemini_SystemInstruction_Info__
+          </label>
+        </td>
+      </tr>
       <tr class="conntype_ollama_api">
         <td><label>
           <span>__MSG_prefs_API_Host__</span>
diff --git a/options/mzta-options.js b/options/mzta-options.js
index 43c97037..470aead6 100644
--- a/options/mzta-options.js
+++ b/options/mzta-options.js
@@ -45,7 +45,9 @@ function saveOptions(e) {
       default:
         if (element.tagName === 'SELECT') {
           options[element.id] = element.value;
-        }else{
+        } else if (element.tagName === 'TEXTAREA') {
+          options[element.id] = element.value.trim();
+        } else {
           console.error("[ThunderAI] Unhandled input type:", element.type);
         }
     }
@@ -82,6 +84,8 @@ async function restoreOptions() {
           if (element.value === '') {
             element.selectedIndex = -1;
           }
+        } else if (element.tagName === 'TEXTAREA') {
+          element.value = result[element.id];
         }else{
           console.error("[ThunderAI] Unhandled input type:", element.type);
         }