diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
index 046eb41..8760de9 100644
--- a/RELEASE_NOTES.md
+++ b/RELEASE_NOTES.md
@@ -1,2 +1,29 @@
-#### 1.4.0-beta2 October 31 2019 ####
-Fixed [an issue with Snapshot serialization in v1.4.0-beta1](https://github.com/akkadotnet/Akka.Persistence.MongoDB/pull/98)
\ No newline at end of file
+#### 1.4.0-beta3 February 04 2020 ####
+
+Introduced legacy serialization modes.
+
+[Going from v1.4.0 onwards, all events and snapshots are saved as byte arrays using the standard Akka.Persistence format](https://github.com/akkadotnet/Akka.Persistence.MongoDB/issues/72).
+
+However, in the event that you have one of the following use cases:
+
+1. Legacy data all stored in the original BSON / "object" format;
+2. A use case where BSON is preferable, i.e. so it can be queried directly via MongoDb queries rather than Akka.Persistence.Query; or
+3. A requirement to keep all data in human-readable form.
+
+Then you can disable binary serialization (enabled by default) via the following HOCON:
+
+```
+akka.persistence.mongodb{
+   journal{
+    legacy-serialization = off
+  }
+
+  snapshot-store{
+   legacy-serialization = off
+ }
+}
+```
+
+Setting `legacy-serialization = on` will allow you to save objects in a BSON format.
+
+**WARNING**: However, `legacy-serialization = on` will break Akka.NET serialization. `IActorRef`s, Akka.Cluster.Sharding, `AtLeastOnceDelivery` actors, and other built-in Akka.NET use cases can't be properly supported using this format. Use it at your own risk.
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diff --git a/build.fsx b/build.fsx
index ae2608b..0e19f78 100644
--- a/build.fsx
+++ b/build.fsx
@@ -23,15 +23,20 @@ let solutionFile = FindFirstMatchingFile "*.sln" __SOURCE_DIRECTORY__  // dynami
 let buildNumber = environVarOrDefault "BUILD_NUMBER" "0"
 let hasTeamCity = (not (buildNumber = "0")) // check if we have the TeamCity environment variable for build # set
 let preReleaseVersionSuffix = "beta" + (if (not (buildNumber = "0")) then (buildNumber) else DateTime.UtcNow.Ticks.ToString())
+let releaseNotes =
+    File.ReadLines (__SOURCE_DIRECTORY__ @@ "RELEASE_NOTES.md")
+    |> ReleaseNotesHelper.parseReleaseNotes
+
+let versionFromReleaseNotes =
+    match releaseNotes.SemVer.PreRelease with
+    | Some r -> r.Origin
+    | None -> ""
+
 let versionSuffix = 
     match (getBuildParam "nugetprerelease") with
     | "dev" -> preReleaseVersionSuffix
-    | "" -> ""
+    | "" -> versionFromReleaseNotes
     | str -> str
-    
-let releaseNotes =
-    File.ReadLines "./RELEASE_NOTES.md"
-    |> ReleaseNotesHelper.parseReleaseNotes
 
 // Directories
 let toolsDir = __SOURCE_DIRECTORY__ @@ "tools"
@@ -139,7 +144,7 @@ Target "SignPackages" (fun _ ->
     if(canSign) then
         log "Signing information is available."
         
-        let assemblies = !! (outputNuGet @@ "*.nupkg")
+        let assemblies = !! (outputNuGet @@ "*.*upkg")
 
         let signPath =
             let globalTool = tryFindFileOnPath "SignClient.exe"
diff --git a/src/common.props b/src/common.props
index b71854b..a4f5244 100644
--- a/src/common.props
+++ b/src/common.props
@@ -1,12 +1,30 @@
 <Project>
   <PropertyGroup>
-    <Copyright>Copyright © 2013-2019 Akka.NET Project</Copyright>
+    <Copyright>Copyright © 2013-2020 Akka.NET Project</Copyright>
     <Authors>Akka.NET Contrib</Authors>
     <VersionPrefix>1.4.0</VersionPrefix>
     <PackageIconUrl>http://getakka.net/images/akkalogo.png</PackageIconUrl>
     <PackageProjectUrl>https://github.com/akkadotnet/Akka.Persistence.MongoDB</PackageProjectUrl>
     <PackageLicenseUrl>https://github.com/akkadotnet/Akka.Persistence.MongoDB/blob/master/LICENSE.md</PackageLicenseUrl>
-    <PackageReleaseNotes>Fixed [an issue with Snapshot serialization in v1.4.0-beta1](https://github.com/akkadotnet/Akka.Persistence.MongoDB/pull/98)</PackageReleaseNotes>
+    <PackageReleaseNotes>Introduced legacy serialization modes.
+[Going from v1.4.0 onwards, all events and snapshots are saved as byte arrays using the standard Akka.Persistence format](https://github.com/akkadotnet/Akka.Persistence.MongoDB/issues/72).
+However, in the event that you have one of the following use cases:
+1. Legacy data all stored in the original BSON / "object" format;
+2. A use case where BSON is preferable, i.e. so it can be queried directly via MongoDb queries rather than Akka.Persistence.Query; or
+3. A requirement to keep all data in human-readable form.
+Then you can disable binary serialization (enabled by default) via the following HOCON:
+```
+akka.persistence.mongodb{
+journal{
+legacy-serialization = off
+}
+snapshot-store{
+legacy-serialization = off
+}
+}
+```
+Setting `legacy-serialization = on` will allow you to save objects in a BSON format.
+WARNING**: However, `legacy-serialization = on` will break Akka.NET serialization. `IActorRef`s, Akka.Cluster.Sharding, `AtLeastOnceDelivery` actors, and other built-in Akka.NET use cases can't be properly supported using this format. Use it at your own risk.</PackageReleaseNotes>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <Description>Akka Persistence journal and snapshot store backed by MongoDB database.</Description>
     <NoWarn>$(NoWarn);CS1591</NoWarn>
@@ -16,4 +34,16 @@
     <TestSdkVersion>16.4.0</TestSdkVersion>
     <AkkaVersion>1.4.0-beta4</AkkaVersion>
   </PropertyGroup>
+  <!-- SourceLink support for all Akka.NET projects -->
+  <ItemGroup>
+    <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.0.0" PrivateAssets="All" />
+  </ItemGroup>
+  <PropertyGroup>
+    <PublishRepositoryUrl>true</PublishRepositoryUrl>
+    <!-- Optional: Embed source files that are not tracked by the source control manager in the PDB -->
+    <EmbedUntrackedSources>true</EmbedUntrackedSources>
+    <!-- Optional: Build symbol package (.snupkg) to distribute the PDB containing Source Link -->
+    <IncludeSymbols>true</IncludeSymbols>
+    <SymbolPackageFormat>snupkg</SymbolPackageFormat>
+  </PropertyGroup>
 </Project>
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