diff --git a/_locales/en/messages.json b/_locales/en/messages.json
index 31498087..6a445b69 100644
--- a/_locales/en/messages.json
+++ b/_locales/en/messages.json
@@ -1043,6 +1043,10 @@
     "message": "To use the calendar event feature, please install the ThunderAI Sparks addon.",
     "description": ""
   },
+  "prefs_OptionText_get_calendar_event_Sparks_wrong_version": {
+    "message": "To use the calendar event feature, please install an updated version of ThunderAI Sparks addon.",
+    "description": ""
+  },
   "prefs_OptionText_download_now": {
     "message": "Download ThunderAI Sparks now!",
     "description": ""
diff --git a/js/mzta-utils.js b/js/mzta-utils.js
index 02009edd..d314faf0 100644
--- a/js/mzta-utils.js
+++ b/js/mzta-utils.js
@@ -16,6 +16,8 @@
  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+const sparks_min = '1.2.0'; // Minimum version of ThunderAI-Sparks required for the add-on to work
+
 export const getMenuContextCompose = () => 'compose_action_menu';
 export const getMenuContextDisplay = () => 'message_display_action_menu';
 
@@ -367,9 +369,17 @@ export function extractJsonObject(inputString) {
 
 export async function checkSparksPresence() {
   try {
-    return (await browser.runtime.sendMessage('thunderai-sparks@micz.it',{action: "checkPresence"}) === 'ok');
+    let sparks_current = await browser.runtime.sendMessage('thunderai-sparks@micz.it',{action: "checkPresence"});
+    if(sparks_current === undefined || sparks_current === null) {
+      return -1;
+    }
+    if (compareThunderbirdVersions(sparks_current, sparks_min) < 0) {
+      return 0;
+    }else{
+      return 1;
+    }
   } catch (error) {
-    return false;
+    return -1;
   }
 }
 
diff --git a/mzta-background.js b/mzta-background.js
index 035de46d..e8bc0500 100644
--- a/mzta-background.js
+++ b/mzta-background.js
@@ -618,7 +618,7 @@ function checkScreenDimensions(prefs){
 
 async function doGetCalendarEvent(get_calendar_event) {
     if(get_calendar_event) {
-        return await checkSparksPresence();
+        return (await checkSparksPresence() == 1);
     } else {
         return false;
     }
diff --git a/options/mzta-options.html b/options/mzta-options.html
index 0423168f..30b8a790 100644
--- a/options/mzta-options.html
+++ b/options/mzta-options.html
@@ -376,7 +376,8 @@
       </tr>
       <tr class="get_calendar_event_tr" id="no_sparks">
         <td colspan="2">
-          <span>__MSG_prefs_OptionText_get_calendar_event_Sparks_not_present__</span>
+          <span id="no_sparks_text">__MSG_prefs_OptionText_get_calendar_event_Sparks_not_present__</span>
+          <span id="wrong_sparks_text">__MSG_prefs_OptionText_get_calendar_event_Sparks_wrong_version__</span>
           <br><a href="https://addons.thunderbird.net/it/thunderbird/addon/thunderai-sparks">__MSG_prefs_OptionText_download_now__</a>
         </td>
       </tr>
diff --git a/options/mzta-options.js b/options/mzta-options.js
index 19994820..ee575645 100644
--- a/options/mzta-options.js
+++ b/options/mzta-options.js
@@ -299,14 +299,18 @@ function disable_SpamFilter(){
 async function disable_GetCalendarEvent(){
   let get_calendar_event = document.getElementById('get_calendar_event');
   let no_sparks_tr = document.getElementById('no_sparks');
-  let is_spark_present = await checkSparksPresence()
+  let no_sparks_text = document.getElementById('no_sparks_text');
+  let wrong_sparks_text = document.getElementById('wrong_sparks_text');
+  let is_spark_present = await checkSparksPresence();
   let conntype_select = document.getElementById("connection_type");
-  get_calendar_event.disabled = (conntype_select.value === "chatgpt_web") || !is_spark_present;
+  get_calendar_event.disabled = (conntype_select.value === "chatgpt_web") || !(is_spark_present == 1);
   let get_calendar_event_tr_elements = document.querySelectorAll('.get_calendar_event_tr');
   get_calendar_event_tr_elements.forEach(get_calendar_event_tr => {
     get_calendar_event_tr.style.display = get_calendar_event.disabled ? 'none' : 'table-row';
   });
-  no_sparks_tr.style.display = (is_spark_present || (conntype_select.value === "chatgpt_web")) ? 'none' : 'table-row';
+  no_sparks_tr.style.display = ((is_spark_present == 1) || (conntype_select.value === "chatgpt_web")) ? 'none' : 'table-row';
+  no_sparks_text.style.display = (is_spark_present == -1) ? 'inline' : 'none';
+  wrong_sparks_text.style.display = (is_spark_present == 0) ? 'inline' : 'none';
 }
 
 document.addEventListener('DOMContentLoaded', async () => {
diff --git a/popup/mzta-popup.js b/popup/mzta-popup.js
index 347277a1..590f0019 100644
--- a/popup/mzta-popup.js
+++ b/popup/mzta-popup.js
@@ -338,7 +338,7 @@ function checkDoAddTags(){
 }
 
 function checkDoCalendarEvent(){
-  return get_calendar_event && (connection_type !== "chatgpt_web" && tabType !== 'messageCompose') && checkSparksPresence();
+  return get_calendar_event && (connection_type !== "chatgpt_web" && tabType !== 'messageCompose') && (checkSparksPresence() == 1);
 }
 
 function ensurePromptAddTagsFirst(arr) {