diff --git a/src/iOS.Extension/iOS.Extension.csproj b/src/iOS.Extension/iOS.Extension.csproj
index ecdbc25bc..d90edd41d 100644
--- a/src/iOS.Extension/iOS.Extension.csproj
+++ b/src/iOS.Extension/iOS.Extension.csproj
@@ -74,7 +74,7 @@
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
     <ConsolePause>false</ConsolePause>
-    <MtouchArch>ARMv7</MtouchArch>
+    <MtouchArch>ARM64</MtouchArch>
     <CodesignEntitlements>Entitlements.plist</CodesignEntitlements>
     <CodesignKey>iPhone Developer</CodesignKey>
     <MtouchDebug>True</MtouchDebug>
@@ -105,7 +105,7 @@
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
     <CodesignEntitlements>Entitlements.plist</CodesignEntitlements>
-    <MtouchArch>ARMv7</MtouchArch>
+    <MtouchArch>ARM64</MtouchArch>
     <ConsolePause>false</ConsolePause>
     <CodesignKey>iPhone Developer</CodesignKey>
     <MtouchSdkVersion>9.3</MtouchSdkVersion>
@@ -131,7 +131,7 @@
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
     <ConsolePause>False</ConsolePause>
-    <MtouchArch>ARMv7</MtouchArch>
+    <MtouchArch>ARM64</MtouchArch>
     <CodesignEntitlements>Entitlements.plist</CodesignEntitlements>
     <BuildIpa>True</BuildIpa>
     <CodesignProvision>Automatic:AdHoc</CodesignProvision>
@@ -159,7 +159,7 @@
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
     <ConsolePause>False</ConsolePause>
-    <MtouchArch>ARMv7</MtouchArch>
+    <MtouchArch>ARM64</MtouchArch>
     <CodesignEntitlements>Entitlements.plist</CodesignEntitlements>
     <CodesignProvision>Automatic:AppStore</CodesignProvision>
     <CodesignKey>iPhone Distribution</CodesignKey>