diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index eb5b4eb..06980e1 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -45,8 +45,8 @@ jobs:
     #  workaround for actions/setup-dotnet#155
     - name: Clear package cache
       run: dotnet clean Wasmtime.sln && dotnet nuget locals all --clear
-    - name: Enable development builds for the main branch
-      if: github.ref == 'refs/heads/main' || github.base_ref == 'main'
+    - name: Enable development builds for the main branch on schedule
+      if: github.ref == 'refs/heads/main' && github.event_name == 'schedule'
       shell: bash
       run: |
         echo "DevBuild=true" >> $GITHUB_ENV
diff --git a/Directory.Build.props b/Directory.Build.props
index a3b3054..45dfd23 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -1,7 +1,7 @@
 <Project>
   <PropertyGroup>
-    <DevBuild Condition="'$(DevBuild)'==''">true</DevBuild>
-    <WasmtimeVersion Condition="'$(WasmtimeVersion)'==''">19.0.1</WasmtimeVersion>
+    <DevBuild Condition="'$(DevBuild)'==''">false</DevBuild>
+    <WasmtimeVersion Condition="'$(WasmtimeVersion)'==''">20.0.2</WasmtimeVersion>
     <WasmtimeDotnetVersion Condition="'$(WasmtimeDotnetVersion)'==''"></WasmtimeDotnetVersion>
     <WasmtimePackageVersion Condition="'$(DevBuild)'=='true'">$(WasmtimeVersion)$(WasmtimeDotnetVersion)-dev</WasmtimePackageVersion>
     <WasmtimePackageVersion Condition="'$(WasmtimePackageVersion)'==''">$(WasmtimeVersion)$(WasmtimeDotnetVersion)</WasmtimePackageVersion>
diff --git a/src/AssemblyAttributes.cs b/src/AssemblyAttributes.cs
index 1b1f1ea..dffc923 100644
--- a/src/AssemblyAttributes.cs
+++ b/src/AssemblyAttributes.cs
@@ -1,3 +1,3 @@
 using System.Runtime.CompilerServices;
 
-[assembly: InternalsVisibleTo("Wasmtime.Tests")]
\ No newline at end of file
+[assembly: InternalsVisibleTo("Wasmtime.Tests, PublicKey=0024000004800000940000000602000000240000525341310004000001000100fd9d8818d77c29c70efc6c0c573d0547c68c817daa3367480741c301cbff5faf8e118dbbbaa6d54b5d81232da8f3d94d0de6e957dd712ad5d859497f212f43d92cc16ae545812320b8db34f661c51e254719a1d30c46a13110bd4d7167ebf7119d8fd6f24dcfbcd298ac5806be089cbca5edf9167d28a3c8af3fc08c994972c1")]
\ No newline at end of file
diff --git a/src/Utils/wasmtime.snk b/src/Utils/wasmtime.snk
new file mode 100644
index 0000000..14d61b8
Binary files /dev/null and b/src/Utils/wasmtime.snk differ
diff --git a/src/Wasmtime.csproj b/src/Wasmtime.csproj
index 7708152..242d6b4 100644
--- a/src/Wasmtime.csproj
+++ b/src/Wasmtime.csproj
@@ -97,6 +97,8 @@ The .NET embedding of Wasmtime enables .NET code to instantiate WebAssembly modu
     <ReleaseURLBase Condition="'$(ReleaseURLBase)'==''">$(BaseURL)/v$(WasmtimeVersion)</ReleaseURLBase>
     <ReleaseFileNameBase Condition="'$(DevBuild)'=='true'">wasmtime-dev</ReleaseFileNameBase>
     <ReleaseFileNameBase Condition="'$(ReleaseFileNameBase)'==''">wasmtime-v$(WasmtimeVersion)</ReleaseFileNameBase>
+    <SignAssembly>True</SignAssembly>
+    <AssemblyOriginatorKeyFile>Utils\wasmtime.snk</AssemblyOriginatorKeyFile>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/tests/Utils/wasmtime.tests.snk b/tests/Utils/wasmtime.tests.snk
new file mode 100644
index 0000000..c842c38
Binary files /dev/null and b/tests/Utils/wasmtime.tests.snk differ
diff --git a/tests/Wasmtime.Tests.csproj b/tests/Wasmtime.Tests.csproj
index 859eb82..ba074a7 100644
--- a/tests/Wasmtime.Tests.csproj
+++ b/tests/Wasmtime.Tests.csproj
@@ -16,6 +16,11 @@
     </PackageReference>
   </ItemGroup>
 
+  <PropertyGroup>
+    <SignAssembly>true</SignAssembly>
+    <AssemblyOriginatorKeyFile>Utils\wasmtime.tests.snk</AssemblyOriginatorKeyFile>
+  </PropertyGroup>
+
   <ItemGroup>
     <ProjectReference Include="..\src\Wasmtime.csproj" />
   </ItemGroup>