diff --git a/BHoMUpgrader/BHoMUpgrader.csproj b/BHoMUpgrader/BHoMUpgrader.csproj
index dee52a4..faccbba 100644
--- a/BHoMUpgrader/BHoMUpgrader.csproj
+++ b/BHoMUpgrader/BHoMUpgrader.csproj
@@ -36,8 +36,8 @@
       <HintPath>C:\ProgramData\BHoM\Assemblies\BHoM.dll</HintPath>
       <Private>True</Private>
     </Reference>
-    <Reference Include="MongoDB.Bson, Version=2.9.3.0, Culture=neutral, processorArchitecture=MSIL">
-      <HintPath>..\packages\MongoDB.Bson.2.9.3\lib\net452\MongoDB.Bson.dll</HintPath>
+    <Reference Include="MongoDB.Bson, Version=2.18.0.0, Culture=neutral, processorArchitecture=MSIL">
+      <HintPath>..\packages\MongoDB.Bson.2.18.0\lib\net472\MongoDB.Bson.dll</HintPath>
     </Reference>
     <Reference Include="Reflection_Engine">
       <SpecificVersion>False</SpecificVersion>
@@ -50,6 +50,9 @@
     </Reference>
     <Reference Include="System" />
     <Reference Include="System.Core" />
+    <Reference Include="System.Runtime.CompilerServices.Unsafe, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\packages\System.Runtime.CompilerServices.Unsafe.5.0.0\lib\net45\System.Runtime.CompilerServices.Unsafe.dll</HintPath>
+    </Reference>
     <Reference Include="System.Xml.Linq" />
     <Reference Include="System.Data.DataSetExtensions" />
     <Reference Include="Microsoft.CSharp" />
diff --git a/BHoMUpgrader/packages.config b/BHoMUpgrader/packages.config
index 842f2bb..fc0cc05 100644
--- a/BHoMUpgrader/packages.config
+++ b/BHoMUpgrader/packages.config
@@ -1,4 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="MongoDB.Bson" version="2.9.3" targetFramework="net452" />
+  <package id="MongoDB.Bson" version="2.18.0" targetFramework="net472" />
+  <package id="System.Runtime.CompilerServices.Unsafe" version="5.0.0" targetFramework="net472" />
 </packages>
\ No newline at end of file
diff --git a/PostBuild/PostBuild.csproj b/PostBuild/PostBuild.csproj
index 3384485..6754eda 100644
--- a/PostBuild/PostBuild.csproj
+++ b/PostBuild/PostBuild.csproj
@@ -44,8 +44,8 @@
       <Private>True</Private>
       <HintPath>C:\ProgramData\BHoM\Assemblies\BHoM_Engine.dll</HintPath>
     </Reference>
-    <Reference Include="MongoDB.Bson, Version=2.9.3.0, Culture=neutral, processorArchitecture=MSIL">
-      <HintPath>..\packages\MongoDB.Bson.2.9.3\lib\net452\MongoDB.Bson.dll</HintPath>
+    <Reference Include="MongoDB.Bson, Version=2.18.0.0, Culture=neutral, processorArchitecture=MSIL">
+      <HintPath>..\packages\MongoDB.Bson.2.18.0\lib\net472\MongoDB.Bson.dll</HintPath>
     </Reference>
     <Reference Include="Serialiser_Engine">
       <SpecificVersion>False</SpecificVersion>
@@ -54,6 +54,9 @@
     </Reference>
     <Reference Include="System" />
     <Reference Include="System.Core" />
+    <Reference Include="System.Runtime.CompilerServices.Unsafe, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\packages\System.Runtime.CompilerServices.Unsafe.5.0.0\lib\net45\System.Runtime.CompilerServices.Unsafe.dll</HintPath>
+    </Reference>
     <Reference Include="System.Xml.Linq" />
     <Reference Include="System.Data.DataSetExtensions" />
     <Reference Include="Microsoft.CSharp" />
diff --git a/PostBuild/packages.config b/PostBuild/packages.config
index 842f2bb..fc0cc05 100644
--- a/PostBuild/packages.config
+++ b/PostBuild/packages.config
@@ -1,4 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="MongoDB.Bson" version="2.9.3" targetFramework="net452" />
+  <package id="MongoDB.Bson" version="2.18.0" targetFramework="net472" />
+  <package id="System.Runtime.CompilerServices.Unsafe" version="5.0.0" targetFramework="net472" />
 </packages>
\ No newline at end of file