diff --git a/.travis.yml b/.travis.yml
index d80d24f32c..b0c0c807cb 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -11,6 +11,8 @@ mono:
   - 5.2.0
 dotnet: 2.1.200
 script:
+  - sudo apt-get update
+  - sudo apt-get install castxml
   - ./build.sh --target "Travis" --configuration "Release"
 notifications:
   email: false
diff --git a/build.cake b/build.cake
index 000cbb1784..d653e9da58 100644
--- a/build.cake
+++ b/build.cake
@@ -3,8 +3,8 @@
 ///////////////////////////////////////////////////////////////////////////////
 
 #addin "nuget:?package=NuGet.Core&version=2.14.0"
-#tool "nuget:?package=NuGet.CommandLine&version=4.3.0"
-#tool "nuget:?package=JetBrains.ReSharper.CommandLineTools&version=2017.1.20170613.162720"
+#tool "nuget:?package=NuGet.CommandLine&version=4.7.1"
+#tool "nuget:?package=JetBrains.ReSharper.CommandLineTools&version=2018.2.3"
 
 ///////////////////////////////////////////////////////////////////////////////
 // TOOLS
diff --git a/tools/packages.config b/tools/packages.config
index 3c65df896f..05018882e8 100644
--- a/tools/packages.config
+++ b/tools/packages.config
@@ -1,4 +1,4 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-    <package id="Cake" version="0.28.0" />
+    <package id="Cake" version="0.30.0" />
 </packages>