diff --git a/src/Microsoft.Azure.Functions.PowerShellWorker.csproj b/src/Microsoft.Azure.Functions.PowerShellWorker.csproj
index ae45debd..3dde9b27 100644
--- a/src/Microsoft.Azure.Functions.PowerShellWorker.csproj
+++ b/src/Microsoft.Azure.Functions.PowerShellWorker.csproj
@@ -20,10 +20,10 @@ Licensed under the MIT license. See LICENSE file in the project root for full li
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Grpc.Core" Version="1.20.1" />
+    <PackageReference Include="Grpc.Core" Version="2.27.0" />
     <PackageReference Include="Microsoft.PowerShell.SDK" Version="7.0.0" />
     <PackageReference Include="CommandLineParser" Version="2.3.0" />
-    <PackageReference Include="Google.Protobuf" Version="3.7.0" />
+    <PackageReference Include="Google.Protobuf" Version="3.11.4" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/tools/helper.psm1 b/tools/helper.psm1
index 5af17d4e..30f777b2 100644
--- a/tools/helper.psm1
+++ b/tools/helper.psm1
@@ -9,6 +9,8 @@ $IsWindowsEnv = [RuntimeInformation]::IsOSPlatform([OSPlatform]::Windows)
 $RepoRoot = (Resolve-Path "$PSScriptRoot/..").Path
 $MinimalSDKVersion = '3.1.1'
 $LocalDotnetDirPath = if ($IsWindowsEnv) { "$env:LocalAppData\Microsoft\dotnet" } else { "$env:HOME/.dotnet" }
+$GrpcToolsVersion = '2.27.0' # grpc.tools
+$GoogleProtobufToolsVersion = '3.11.4' # google.protobuf.tools
 
 function Find-Dotnet
 {
@@ -141,29 +143,24 @@ function Resolve-ProtoBufToolPath
         }
 
         $Script:protoc_Path =
-            Get-ChildItem "$nugetPath/grpc.tools/*/$protoc_Name" -Recurse |
-            Where-Object FullName -Like "*$plat_arch_Name*" |
-            Sort-Object -Property FullName -Descending |
-            Select-Object -First 1 | ForEach-Object FullName
+            Resolve-Path "$nugetPath/grpc.tools/$GrpcToolsVersion/tools/$plat_arch_Name/$protoc_Name" |
+            ForEach-Object Path
 
         if (-not $Script:protoc_Path) {
             throw "Couldn't find the executable 'protoc'. Check if the package 'grpc.tools' has been restored."
         }
 
         $Script:grpc_csharp_plugin_Path =
-            Get-ChildItem "$nugetPath/grpc.tools/*/$grpc_csharp_plugin_Name" -Recurse |
-            Where-Object FullName -Like "*$plat_arch_Name*" |
-            Sort-Object -Property FullName -Descending |
-            Select-Object -First 1 | ForEach-Object FullName
+            Resolve-Path "$nugetPath/grpc.tools/$GrpcToolsVersion/tools/$plat_arch_Name/$grpc_csharp_plugin_Name" |
+            ForEach-Object Path
 
         if (-not $Script:grpc_csharp_plugin_Path) {
             throw "Couldn't find the executable 'grpc_csharp_plugin'. Check if the package 'grpc.tools' has been restored."
         }
 
         $Script:google_protobuf_tools_Path =
-            Get-ChildItem "$nugetPath/google.protobuf.tools/*/tools" |
-            Sort-Object -Property FullName -Descending |
-            Select-Object -First 1 | ForEach-Object FullName
+            Resolve-Path "$nugetPath/google.protobuf.tools/$GoogleProtobufToolsVersion/tools" |
+            ForEach-Object Path
 
         if (-not $Script:google_protobuf_tools_Path) {
             throw "Couldn't find the protobuf tools. Check if the package 'google.protobuf.tools' has been restored."
diff --git a/tools/protobuf.tools.csproj b/tools/protobuf.tools.csproj
index 8e069cfe..f74bf36a 100644
--- a/tools/protobuf.tools.csproj
+++ b/tools/protobuf.tools.csproj
@@ -11,8 +11,8 @@ Licensed under the MIT license. See LICENSE file in the project root for full li
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Grpc.Tools" Version="1.15.0" />
-    <PackageReference Include="Google.Protobuf.Tools" Version="3.6.1" />
+    <PackageReference Include="Grpc.Tools" Version="2.27.0" />
+    <PackageReference Include="Google.Protobuf.Tools" Version="3.11.4" />
   </ItemGroup>
 
 </Project>