diff --git a/build/NuSpecs/UmbracoCms.Core.nuspec b/build/NuSpecs/UmbracoCms.Core.nuspec
index 35eef49ec2..fce15eb487 100644
--- a/build/NuSpecs/UmbracoCms.Core.nuspec
+++ b/build/NuSpecs/UmbracoCms.Core.nuspec
@@ -23,7 +23,7 @@
                   the latter would pick anything below 3.0.0 and that includes prereleases such as 3.0.0-alpha, and we do
                   not want this to happen as the alpha of the next major is, really, the next major already.
                 -->
-                <dependency id="LightInject" version="[6.4.0,6.999999)" />
+                <dependency id="LightInject" version="[5.4.0,5.999999)" />
                 <dependency id="LightInject.Annotation" version="[1.1.0,1.999999)" />
                 <dependency id="LightInject.Web" version="[2.0.0,2.999999)" />
                 <dependency id="Microsoft.AspNet.Identity.Core" version="[2.2.2,2.999999)" />
diff --git a/src/Umbraco.Core/Umbraco.Core.csproj b/src/Umbraco.Core/Umbraco.Core.csproj
index 635d8080cf..2ea5292d73 100755
--- a/src/Umbraco.Core/Umbraco.Core.csproj
+++ b/src/Umbraco.Core/Umbraco.Core.csproj
@@ -77,7 +77,7 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>
-    <PackageReference Include="LightInject" Version="6.4.0" />
+    <PackageReference Include="LightInject" Version="5.4.0" />
     <PackageReference Include="LightInject.Annotation" Version="1.1.0" />
     <PackageReference Include="LightInject.Web" Version="2.0.0" />
     <PackageReference Include="Microsoft.AspNet.Identity.Core">
diff --git a/src/Umbraco.Tests/Umbraco.Tests.csproj b/src/Umbraco.Tests/Umbraco.Tests.csproj
index 8397e0baf3..9d4bc4294c 100644
--- a/src/Umbraco.Tests/Umbraco.Tests.csproj
+++ b/src/Umbraco.Tests/Umbraco.Tests.csproj
@@ -83,7 +83,7 @@
     <PackageReference Include="HtmlAgilityPack">
       <Version>1.8.14</Version>
     </PackageReference>
-    <PackageReference Include="LightInject" Version="6.4.0" />
+    <PackageReference Include="LightInject" Version="5.4.0" />
     <PackageReference Include="LightInject.Annotation" Version="1.1.0" />
     <PackageReference Include="Lucene.Net" Version="3.0.3" />
     <PackageReference Include="Lucene.Net.Contrib" Version="3.0.3" />
diff --git a/src/Umbraco.Web/Umbraco.Web.csproj b/src/Umbraco.Web/Umbraco.Web.csproj
index ce244f126c..a6cbefa825 100644
--- a/src/Umbraco.Web/Umbraco.Web.csproj
+++ b/src/Umbraco.Web/Umbraco.Web.csproj
@@ -68,7 +68,7 @@
     <PackageReference Include="ImageProcessor">
       <Version>2.7.0.100</Version>
     </PackageReference>
-    <PackageReference Include="LightInject" Version="6.4.0" />
+    <PackageReference Include="LightInject" Version="5.4.0" />
     <PackageReference Include="LightInject.Annotation" Version="1.1.0" />
     <PackageReference Include="LightInject.Mvc" Version="2.0.0" />
     <PackageReference Include="LightInject.WebApi" Version="2.0.0" />
@@ -1306,4 +1306,4 @@
       <Output TaskParameter="SerializationAssembly" ItemName="SerializationAssembly" />
     </SGen>
   </Target>
-</Project>
\ No newline at end of file
+</Project>