diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
index 43ca31193b..dde0d1ca6f 100644
--- a/RELEASE_NOTES.md
+++ b/RELEASE_NOTES.md
@@ -1,4 +1,4 @@
-#### 4.0.0-rc8 - 14.03.2017
+#### 4.0.0-rc9 - 14.03.2017
 * Make Paket compatible with DotNet SDK / MSBuild 15 / Visual Sudio 2017
 * Tail Recursive Package Resolution - https://github.com/fsprojects/Paket/pull/2066
 * Reorganized resolver - https://github.com/fsprojects/Paket/pull/2039
diff --git a/src/Paket.Core/Files/ProjectFile.fs b/src/Paket.Core/Files/ProjectFile.fs
index cb5b5ee2c3..7c7296d9d9 100644
--- a/src/Paket.Core/Files/ProjectFile.fs
+++ b/src/Paket.Core/Files/ProjectFile.fs
@@ -12,6 +12,7 @@ open System.Xml
 open Paket.Xml
 open Paket.Requirements
 open Paket.PackageSources
+open System.Globalization
 
 [<RequireQualifiedAccess>]
 type BuildAction =
@@ -1524,7 +1525,7 @@ type ProjectFile with
     member this.GetToolsVersion () : float =
         try
             let v = this.ProjectNode.Attributes.["ToolsVersion"].Value
-            match Double.TryParse v with
+            match Double.TryParse(v, NumberStyles.Any, CultureInfo.InvariantCulture) with
             | true , 15.0 -> 
                     let sdkAttr = this.ProjectNode.Attributes.["Sdk"]
                     if  isNull sdkAttr || String.IsNullOrWhiteSpace sdkAttr.Value