diff --git a/OmniCC/OmniCC.toc b/OmniCC/OmniCC.toc
index 034efb0..9e940f9 100644
--- a/OmniCC/OmniCC.toc
+++ b/OmniCC/OmniCC.toc
@@ -1,4 +1,4 @@
-## Interface: 100207, 40400
+## Interface: 110000, 100207, 40400
 ## Interface-Classic: 11502
 ## Title: OmniCC
 ## Notes: Cooldown count for everything
diff --git a/OmniCC/core/cooldown.lua b/OmniCC/core/cooldown.lua
index 115160d..ad6f728 100644
--- a/OmniCC/core/cooldown.lua
+++ b/OmniCC/core/cooldown.lua
@@ -15,24 +15,52 @@ local cooldowns = {}
 local Cooldown = {}
 
 -- queries
-local function IsGlobalCooldown(start, duration)
-    if start == 0 or duration == 0 then
-        return false
+local IsGlobalCooldown, GetGCDTimeRemaining
+
+if C_Spell and type(C_Spell.GetSpellCooldown) == "function" then
+    IsGlobalCooldown = function (start, duration)
+        if start == 0 or duration == 0 then
+            return false
+        end
+
+        local gcd = C_Spell.GetSpellCooldown(GCD_SPELL_ID)
+
+        return gcd and start == gcd.startTime and duration == gcd.duration
     end
 
-    local gcdStart, gcdDuration = GetSpellCooldown(GCD_SPELL_ID)
+    GetGCDTimeRemaining = function()
+        local gcd = C_Spell.GetSpellCooldown(GCD_SPELL_ID)
 
-    return start == gcdStart and duration == gcdDuration
-end
+        if not gcd then
+            return 0
+        end
+
+        if gcd.startTime == 0 or gcd.duration == 0 then
+            return 0
+        end
 
-local function GetGCDTimeRemaining()
-    local start, duration = GetSpellCooldown(GCD_SPELL_ID)
+        return (gcd.startTime + gcd.duration) - GetTime()
+    end
+else
+    IsGlobalCooldown = function (start, duration)
+        if start == 0 or duration == 0 then
+            return false
+        end
 
-    if start == 0 or duration == 0 then
-        return 0
+        local gcdStart, gcdDuration = GetSpellCooldown(GCD_SPELL_ID)
+
+        return start == gcdStart and duration == gcdDuration
     end
 
-    return (start + duration) - GetTime()
+    GetGCDTimeRemaining = function()
+        local start, duration = GetSpellCooldown(GCD_SPELL_ID)
+
+        if start == 0 or duration == 0 then
+            return 0
+        end
+
+        return (start + duration) - GetTime()
+    end
 end
 
 function Cooldown:CanShowText()
diff --git a/OmniCC/main.lua b/OmniCC/main.lua
index ae4139d..b9dd9df 100644
--- a/OmniCC/main.lua
+++ b/OmniCC/main.lua
@@ -79,7 +79,7 @@ end
 
 -- utility methods
 function Addon:ShowOptionsFrame()
-    if self:IsConfigAddonEnabled() and LoadAddOn(CONFIG_ADDON) then
+    if self:IsConfigAddonEnabled() and C_AddOns.LoadAddOn(CONFIG_ADDON) then
         local dialog = LibStub('AceConfigDialog-3.0')
 
         dialog:Open(ADDON)
@@ -92,11 +92,7 @@ function Addon:ShowOptionsFrame()
 end
 
 function Addon:IsConfigAddonEnabled()
-    if GetAddOnEnableState(UnitName('player'), CONFIG_ADDON) >= 1 then
-        return true
-    end
-
-    return false
+    return C_AddOns.GetAddOnEnableState(CONFIG_ADDON, UnitName('player')) > 0
 end
 
 function Addon:CreateHiddenFrame(...)
diff --git a/OmniCC/settings/settings.lua b/OmniCC/settings/settings.lua
index 5c012f5..694903e 100644
--- a/OmniCC/settings/settings.lua
+++ b/OmniCC/settings/settings.lua
@@ -156,8 +156,8 @@ function Addon:UpgradeDB()
     end
 
     local addonVersion = self.db.global.addonVersion
-    if addonVersion ~= GetAddOnMetadata(AddonName, 'Version') then
-        self.db.global.addonVersion = GetAddOnMetadata(AddonName, 'Version')
+    if addonVersion ~= C_AddOns.GetAddOnMetadata(AddonName, 'Version') then
+        self.db.global.addonVersion = C_AddOns.GetAddOnMetadata(AddonName, 'Version')
     end
 end
 
diff --git a/OmniCC_Config/OmniCC_Config.toc b/OmniCC_Config/OmniCC_Config.toc
index af8eab3..2b79d62 100644
--- a/OmniCC_Config/OmniCC_Config.toc
+++ b/OmniCC_Config/OmniCC_Config.toc
@@ -1,4 +1,4 @@
-## Interface: 100207, 40400
+## Interface: 110000, 100207, 40400
 ## Interface-Classic: 11502
 ## Title: OmniCC Config
 ## Title-ruRU: Конфигурация OmniCC
diff --git a/changelog.md b/changelog.md
index 2401d4a..a263d62 100644
--- a/changelog.md
+++ b/changelog.md
@@ -3,6 +3,7 @@
 ## 10.2.7
 
 * Update TOCs
+* Preliminary War Within support
 
 ## 10.2.6