diff --git a/.gitmodules b/.gitmodules
index e73a3f1233b..970428fd05d 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -17,7 +17,7 @@
 [submodule "external/llvm"]
     path = external/llvm
     url = https://github.com/mono/llvm.git
-    branch = master
+    branch = release_60
 [submodule "external/mman-win32"]
     path = external/mman-win32
     url = https://github.com/witwall/mman-win32.git
@@ -25,7 +25,7 @@
 [submodule "external/mono"]
     path = external/mono
     url = https://github.com/mono/mono.git
-    branch = 2018-04
+    branch = 2018-06
 [submodule "external/mxe"]
     path = external/mxe
     url = https://github.com/xamarin/mxe.git
diff --git a/Configuration.props b/Configuration.props
index a2a9c1d17b1..ec78ddb493c 100644
--- a/Configuration.props
+++ b/Configuration.props
@@ -70,8 +70,8 @@
     <JavaInteropSourceDirectory Condition=" '$(JavaInteropSourceDirectory)' == '' ">$(MSBuildThisFileDirectory)external\Java.Interop</JavaInteropSourceDirectory>
     <LlvmSourceDirectory Condition=" '$(LlvmSourceDirectory)' == '' ">$(MSBuildThisFileDirectory)external\llvm</LlvmSourceDirectory>
     <MonoSourceDirectory>$(MSBuildThisFileDirectory)external\mono</MonoSourceDirectory>
-    <MonoRequiredMinimumVersion Condition=" '$(MonoRequiredMinimumVersion)' == '' ">5.14.0</MonoRequiredMinimumVersion>
-    <MonoRequiredMaximumVersion Condition=" '$(MonoRequiredMaximumVersion)' == '' ">5.15.0</MonoRequiredMaximumVersion>
+    <MonoRequiredMinimumVersion Condition=" '$(MonoRequiredMinimumVersion)' == '' ">5.16.0</MonoRequiredMinimumVersion>
+    <MonoRequiredMaximumVersion Condition=" '$(MonoRequiredMaximumVersion)' == '' ">5.17.0</MonoRequiredMaximumVersion>
     <IgnoreMaxMonoVersion Condition=" '$(IgnoreMaxMonoVersion)' == '' ">True</IgnoreMaxMonoVersion>
     <MonoRequiredDarwinMinimumVersion>$(MonoRequiredMinimumVersion).0</MonoRequiredDarwinMinimumVersion>
     <LinkerSourceDirectory>$(MSBuildThisFileDirectory)external\mono\external\linker</LinkerSourceDirectory>
diff --git a/build-tools/dependencies/dependencies.projitems b/build-tools/dependencies/dependencies.projitems
index f4a2f60e7da..1bd5d8c2e38 100644
--- a/build-tools/dependencies/dependencies.projitems
+++ b/build-tools/dependencies/dependencies.projitems
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <PropertyGroup>
-    <_DarwinMonoFramework>MonoFramework-MDK-5.14.0.141.macos10.xamarin.universal.pkg</_DarwinMonoFramework>
+    <_DarwinMonoFramework>MonoFramework-MDK-5.16.0.106.macos10.xamarin.universal.pkg</_DarwinMonoFramework>
     <_AptGetInstall>apt-get -f -u install</_AptGetInstall>
   </PropertyGroup>
   <ItemGroup>
@@ -59,7 +59,7 @@
       <MaximumVersion Condition=" '$(IgnoreMaxMonoVersion)' == '' Or '$(IgnoreMaxMonoVersion)' == 'False' " >$(MonoRequiredMaximumVersion)</MaximumVersion>
       <DarwinMinimumVersion>$(MonoRequiredDarwinMinimumVersion)</DarwinMinimumVersion>
       <CurrentVersionCommand>$(MSBuildThisFileDirectory)..\scripts\mono-version</CurrentVersionCommand>
-      <DarwinMinimumUrl>https://xamjenkinsartifact.azureedge.net/build-package-osx-mono/2018-04/116/8ae8c52383b43892fb7a35dbf0992738bd52fa90/$(_DarwinMonoFramework)</DarwinMinimumUrl>
+      <DarwinMinimumUrl>https://xamjenkinsartifact.azureedge.net/build-package-osx-mono/2018-06/78/341142d7656f43239a041b2c44f00acfb8fa7c59/$(_DarwinMonoFramework)</DarwinMinimumUrl>
       <DarwinInstall>installer -pkg "$(AndroidToolchainCacheDirectory)\$(_DarwinMonoFramework)" -target /</DarwinInstall>
     </RequiredProgram>
   </ItemGroup>
diff --git a/external/llvm b/external/llvm
index bdb3a116dbf..117a508c0ca 160000
--- a/external/llvm
+++ b/external/llvm
@@ -1 +1 @@
-Subproject commit bdb3a116dbf4a77ef5f6f70d7f845bdaca2b24ca
+Subproject commit 117a508c0ca65b754008e94e3eb97e77edfef04b
diff --git a/external/llvm.tpnitems b/external/llvm.tpnitems
index 4ec2d798d6b..ab9691a8440 100644
--- a/external/llvm.tpnitems
+++ b/external/llvm.tpnitems
@@ -8,10 +8,6 @@
       <LicenseFile>$(MSBuildThisFileDirectory)\llvm\LICENSE.TXT</LicenseFile>
       <SourceUrl>https://github.com/mono/llvm/</SourceUrl>
     </ThirdPartyNotice>
-    <ThirdPartyNotice Include="llvm Autoconf">
-      <LicenseFile>$(MSBuildThisFileDirectory)\llvm\autoconf\LICENSE.TXT</LicenseFile>
-      <SourceUrl>https://github.com/mono/llvm/tree/master/autoconf/</SourceUrl>
-    </ThirdPartyNotice>
     <ThirdPartyNotice Include="llvm Google Test">
       <LicenseFile>$(MSBuildThisFileDirectory)\llvm\utils\unittest\googletest\LICENSE.TXT</LicenseFile>
       <SourceUrl>https://github.com/mono/llvm/tree/master/utils/unittest/googletest/</SourceUrl>
diff --git a/external/mono b/external/mono
index e1af6ea5e72..ab3c897d685 160000
--- a/external/mono
+++ b/external/mono
@@ -1 +1 @@
-Subproject commit e1af6ea5e72629a358fc2f2df888736dd25f4be1
+Subproject commit ab3c897d6851ccf75e840d8b767aafa0d0a32d53
diff --git a/external/xamarin-android-api-compatibility b/external/xamarin-android-api-compatibility
index c550d1bdab4..7ccb4802f3e 160000
--- a/external/xamarin-android-api-compatibility
+++ b/external/xamarin-android-api-compatibility
@@ -1 +1 @@
-Subproject commit c550d1bdab4299e42cb6fce83c828fef313e6678
+Subproject commit 7ccb4802f3efe0ee7a0d5d87c4cfe78832d68aec
diff --git a/src/mono-runtimes/mono-runtimes.projitems b/src/mono-runtimes/mono-runtimes.projitems
index 60d04c497d9..be3fbbf13db 100644
--- a/src/mono-runtimes/mono-runtimes.projitems
+++ b/src/mono-runtimes/mono-runtimes.projitems
@@ -159,7 +159,7 @@
 
     <_MonoCrossRuntime Include="cross-arm-win" Condition="$(AndroidSupportedTargetAotAbisForConditionalChecks.Contains (':win-armeabi-v7a:'))">
       <Strip>$(AndroidMxeFullPath)\bin\$(MingwCommandPrefix32)-strip</Strip>
-      <StripFlags>-S</StripFlags>
+      <StripFlags></StripFlags>
       <ExePrefix>armv7-linux-android-</ExePrefix>
       <ExeSuffix>.exe</ExeSuffix>
       <InstallPath></InstallPath>
@@ -168,7 +168,7 @@
 
     <_MonoCrossRuntime Include="cross-arm64-win" Condition="$(AndroidSupportedTargetAotAbisForConditionalChecks.Contains (':win-arm64:'))">
       <Strip>$(AndroidMxeFullPath)\bin\$(MingwCommandPrefix64)-strip</Strip>
-      <StripFlags>-S</StripFlags>
+      <StripFlags></StripFlags>
       <ExePrefix>aarch64-v8a-linux-android-</ExePrefix>
       <ExeSuffix>.exe</ExeSuffix>
       <InstallPath></InstallPath>
@@ -177,7 +177,7 @@
 
     <_MonoCrossRuntime Include="cross-x86-win" Condition="$(AndroidSupportedTargetAotAbisForConditionalChecks.Contains (':win-x86:'))">
       <Strip>$(AndroidMxeFullPath)\bin\$(MingwCommandPrefix32)-strip</Strip>
-      <StripFlags>-S</StripFlags>
+      <StripFlags></StripFlags>
       <ExePrefix>i686-linux-android-</ExePrefix>
       <ExeSuffix>.exe</ExeSuffix>
       <InstallPath></InstallPath>
@@ -186,7 +186,7 @@
 
     <_MonoCrossRuntime Include="cross-x86_64-win" Condition="$(AndroidSupportedTargetAotAbisForConditionalChecks.Contains (':win-x86_64:'))">
       <Strip>$(AndroidMxeFullPath)\bin\$(MingwCommandPrefix64)-strip</Strip>
-      <StripFlags>-S</StripFlags>
+      <StripFlags></StripFlags>
       <ExePrefix>x86_64-linux-android-</ExePrefix>
       <ExeSuffix>.exe</ExeSuffix>
       <InstallPath></InstallPath>
diff --git a/src/mono-runtimes/mono-runtimes.targets b/src/mono-runtimes/mono-runtimes.targets
index 32d9e609865..f164e8a9adb 100644
--- a/src/mono-runtimes/mono-runtimes.targets
+++ b/src/mono-runtimes/mono-runtimes.targets
@@ -44,7 +44,7 @@
     <_MonoSdksMxePrefixDir>$(AndroidToolchainDirectory)</_MonoSdksMxePrefixDir>
     <_MonoSdksMxeSrc>$(MSBuildThisFileDirectory)..\..\external\mxe</_MonoSdksMxeSrc>
 
-    <_MonoSdksParameters>CONFIGURATION=$(_MonoSdksConfiguration) IGNORE_PROVISION_MXE=true IGNORE_PROVISION_ANDROID=true IGNORE_PACKAGE_LLVM=true ANDROID_TOOLCHAIN_DIR=&quot;$(_MonoSdksAndroidToolchainDir)&quot; ANDROID_TOOLCHAIN_CACHE_DIR=&quot;$(_MonoSdksAndroidToolchainCacheDir)&quot; ANDROID_TOOLCHAIN_PREFIX=&quot;$(_MonoSdksAndroidToolchainPrefix)&quot; LLVM_SRC=&quot;$(_MonoSdksLlvmSrc)&quot; MXE_PREFIX_DIR=&quot;$(_MonoSdksMxePrefixDir)&quot; MXE_SRC=&quot;$(_MonoSdksMxeSrc)&quot;</_MonoSdksParameters>
+    <_MonoSdksParameters>CONFIGURATION=$(_MonoSdksConfiguration) IGNORE_PROVISION_MXE=true IGNORE_PROVISION_ANDROID=true IGNORE_PROVISION_LLVM=true ANDROID_TOOLCHAIN_DIR=&quot;$(_MonoSdksAndroidToolchainDir)&quot; ANDROID_TOOLCHAIN_CACHE_DIR=&quot;$(_MonoSdksAndroidToolchainCacheDir)&quot; ANDROID_TOOLCHAIN_PREFIX=&quot;$(_MonoSdksAndroidToolchainPrefix)&quot; LLVM_SRC=&quot;$(_MonoSdksLlvmSrc)&quot; MXE_PREFIX_DIR=&quot;$(_MonoSdksMxePrefixDir)&quot; MXE_SRC=&quot;$(_MonoSdksMxeSrc)&quot;</_MonoSdksParameters>
   </PropertyGroup>
   <PropertyGroup>
     <ForceBuildDependsOn>
@@ -142,7 +142,7 @@
         ToolExe="$(GitToolExe)">
       <Output TaskParameter="Time" PropertyName="_LlvmCommitTime" />
     </GitCommitTime>
-    <Touch Files="$(LlvmSourceFullPath)\Makefile.config.in" Time="$(_LlvmCommitTime)" />
+    <Touch Files="$(LlvmSourceFullPath)\CMakeLists.txt" Time="$(_LlvmCommitTime)" />
   </Target>
 
   <Target Name="_PrepareLlvmItems">
@@ -158,7 +158,7 @@
   <Target Name="_BuildLlvm"
       Condition=" '@(_LlvmRuntime)' != '' "
       DependsOnTargets="_SetAutogenShTimeToLastCommitTimestamp;_PrepareLlvmItems"
-      Inputs="$(LlvmSourceFullPath)\Makefile.config.in"
+      Inputs="$(LlvmSourceFullPath)\CMakeLists.txt"
       Outputs="@(_LlvmSourceBinary)">
     <Exec
         Command="make DISABLE_IOS=1 $(MakeConcurrency) @(_LlvmRuntime->'package-llvm-%(Identity)', ' ') $(_MonoSdksParameters) @(_LlvmRuntime->'%(PackageOptions)', ' ')"
@@ -584,12 +584,12 @@
   </Target>
   <Target Name="ForceBuild"
       DependsOnTargets="GetMonoBundleItems;$(ForceBuildDependsOn)"
-      Inputs="$(MonoSourceFullPath)\autogen.sh;$(LlvmSourceFullPath)\Makefile.config.in"
+      Inputs="$(MonoSourceFullPath)\autogen.sh;$(LlvmSourceFullPath)\CMakeLists.txt"
       Outputs="@(BundleItem)">
   </Target>
   <Target Name="_BuildUnlessCached"
       DependsOnTargets="_SetAutogenShTimeToLastCommitTimestamp;GetMonoBundleItems"
-      Inputs="$(MonoSourceFullPath)\autogen.sh;$(LlvmSourceFullPath)\Makefile.config.in"
+      Inputs="$(MonoSourceFullPath)\autogen.sh;$(LlvmSourceFullPath)\CMakeLists.txt"
       Outputs="@(BundleItem)">
     <PropertyGroup>
       <_Now>$([System.DateTime]::Now.Ticks)</_Now>