diff --git a/core b/core
index 75aaf31e5..0c2318c79 160000
--- a/core
+++ b/core
@@ -1 +1 @@
-Subproject commit 75aaf31e55d30fe8bf48c57d7b29d21a71a93b32
+Subproject commit 0c2318c7950d456f362d669d0879511cb84bdf1e
diff --git a/public/json/personal_tekezo_launcher_mode_v4.json b/public/json/personal_tekezo_launcher_mode_v4.json
index 25845112b..e17abae28 100644
--- a/public/json/personal_tekezo_launcher_mode_v4.json
+++ b/public/json/personal_tekezo_launcher_mode_v4.json
@@ -5,7 +5,7 @@
   ],
   "rules": [
     {
-      "description": "Launcher Mode v4 (rev 25)",
+      "description": "Launcher Mode v4 (rev 26)",
       "available_since": "15.3.4",
       "manipulators": [
         {
@@ -22,7 +22,7 @@
             {
               "software_function": {
                 "open_application": {
-                  "history_index": 1
+                  "frontmost_application_history_index": 1
                 }
               }
             }
@@ -74,7 +74,7 @@
             {
               "software_function": {
                 "open_application": {
-                  "history_index": 1
+                  "frontmost_application_history_index": 1
                 }
               }
             }
@@ -98,7 +98,7 @@
             {
               "software_function": {
                 "open_application": {
-                  "history_index": 2
+                  "frontmost_application_history_index": 2
                 }
               }
             }
@@ -150,7 +150,7 @@
             {
               "software_function": {
                 "open_application": {
-                  "history_index": 2
+                  "frontmost_application_history_index": 2
                 }
               }
             }
@@ -174,7 +174,7 @@
             {
               "software_function": {
                 "open_application": {
-                  "history_index": 3
+                  "frontmost_application_history_index": 3
                 }
               }
             }
@@ -226,7 +226,7 @@
             {
               "software_function": {
                 "open_application": {
-                  "history_index": 3
+                  "frontmost_application_history_index": 3
                 }
               }
             }
@@ -250,7 +250,7 @@
             {
               "software_function": {
                 "open_application": {
-                  "history_index": 4
+                  "frontmost_application_history_index": 4
                 }
               }
             }
@@ -302,7 +302,7 @@
             {
               "software_function": {
                 "open_application": {
-                  "history_index": 4
+                  "frontmost_application_history_index": 4
                 }
               }
             }
@@ -326,7 +326,7 @@
             {
               "software_function": {
                 "open_application": {
-                  "history_index": 5
+                  "frontmost_application_history_index": 5
                 }
               }
             }
@@ -378,7 +378,7 @@
             {
               "software_function": {
                 "open_application": {
-                  "history_index": 5
+                  "frontmost_application_history_index": 5
                 }
               }
             }
diff --git a/src/json/personal_tekezo_launcher_mode_v4.json.js b/src/json/personal_tekezo_launcher_mode_v4.json.js
index 57d1db9c3..31d0feafd 100755
--- a/src/json/personal_tekezo_launcher_mode_v4.json.js
+++ b/src/json/personal_tekezo_launcher_mode_v4.json.js
@@ -13,14 +13,14 @@ function main() {
         maintainers: ['tekezo'],
         rules: [
           {
-            description: 'Launcher Mode v4 (rev 25)',
+            description: 'Launcher Mode v4 (rev 26)',
             available_since: '15.3.4',
             manipulators: [].concat(
-              generateLauncherMode('1', { historyIndex: 1 }),
-              generateLauncherMode('2', { historyIndex: 2 }),
-              generateLauncherMode('3', { historyIndex: 3 }),
-              generateLauncherMode('4', { historyIndex: 4 }),
-              generateLauncherMode('5', { historyIndex: 5 }),
+              generateLauncherMode('1', { frontmostApplicationHistoryIndex: 1 }),
+              generateLauncherMode('2', { frontmostApplicationHistoryIndex: 2 }),
+              generateLauncherMode('3', { frontmostApplicationHistoryIndex: 3 }),
+              generateLauncherMode('4', { frontmostApplicationHistoryIndex: 4 }),
+              generateLauncherMode('5', { frontmostApplicationHistoryIndex: 5 }),
               generateLauncherMode('a', { bundleIdentifier: 'com.apple.ActivityMonitor' }),
               generateLauncherMode('c', { bundleIdentifier: 'com.google.Chrome' }),
               generateLauncherMode('e', { bundleIdentifier: 'com.microsoft.VSCode' }),
@@ -49,7 +49,7 @@ function generateLauncherMode(
   /**
    * @type {{
    *   bundleIdentifier?: string,
-   *   historyIndex?: number,
+   *   frontmostApplicationHistoryIndex?: number,
    *   to?: any[],
    * }} */
   options
@@ -66,11 +66,11 @@ function generateLauncherMode(
       },
     })
   }
-  if (options.historyIndex !== undefined) {
+  if (options.frontmostApplicationHistoryIndex !== undefined) {
     to.push({
       software_function: {
         open_application: {
-          history_index: options.historyIndex,
+          frontmost_application_history_index: options.frontmostApplicationHistoryIndex,
         },
       },
     })