diff --git a/app/src/main/assets/os.json b/app/src/main/assets/os.json
index a7a850c..ed12efc 100644
--- a/app/src/main/assets/os.json
+++ b/app/src/main/assets/os.json
@@ -178,7 +178,7 @@
   {
     "name": "Hiren's BootCD PE",
     "category": "Recovery",
-    "subcategory": null,
+    "subcategory": "Toolkit",
     "description": "Hiren's BootCD PE (Preinstallation Environment) is a restored edition of Hiren's BootCD based on Windows PE",
     "icon": null,
     "url": "https://www.hirensbootcd.org/download/"
@@ -186,7 +186,7 @@
   {
     "name": "Clonezilla",
     "category": "Recovery",
-    "subcategory": null,
+    "subcategory": "Disk",
     "description": "Clonezilla is a partition and disk imaging/cloning program.",
     "icon": null,
     "url": "https://clonezilla.org/downloads.php"
@@ -194,7 +194,7 @@
   {
     "name": "SystemRescue",
     "category": "Recovery",
-    "subcategory": null,
+    "subcategory": "Toolkit",
     "description": "A Linux system rescue toolkit for administering or repairing your system and data.",
     "icon": null,
     "url": "https://www.system-rescue.org/Download/"
@@ -202,7 +202,7 @@
   {
     "name": "GParted Live",
     "category": "Recovery",
-    "subcategory": null,
+    "subcategory": "Disk",
     "description": "A small bootable GNU/Linux distribution for x86 based computers with the GParted partition editor.",
     "icon": null,
     "url": "https://gparted.org/download.php"
@@ -210,7 +210,7 @@
   {
     "name": "Rescuezilla",
     "category": "Recovery",
-    "subcategory": null,
+    "subcategory": "Disk",
     "description": "The Swiss Army Knife of system recovery. Easy-to-use disk imaging and cloning with a friendly GUI.",
     "icon": null,
     "url": "https://rescuezilla.com/download"
@@ -218,7 +218,7 @@
   {
     "name": "Memtest86+",
     "category": "Recovery",
-    "subcategory": null,
+    "subcategory": "Hardware",
     "description": "Free, open-source memory testing software for x86 and x86-64 computers.",
     "icon": null,
     "url": "https://memtest.org/"
@@ -226,7 +226,7 @@
   {
     "name": "ShredOS",
     "category": "Recovery",
-    "subcategory": null,
+    "subcategory": "Disk",
     "description": "A USB bootable small linux distro for securely erasing your disks using nwipe.",
     "icon": null,
     "url": "https://github.com/PartialVolume/shredos.x86_64/releases"
@@ -234,7 +234,7 @@
   {
     "name": "Super Grub2",
     "category": "Recovery",
-    "subcategory": null,
+    "subcategory": "Boot",
     "description": "Get back to your GNU/Linux & Windows computers !",
     "icon": null,
     "url": "https://www.supergrubdisk.org/category/download/"