diff --git a/src/Thrift.Net.Antlr/Thrift.Net.Antlr.csproj b/src/Thrift.Net.Antlr/Thrift.Net.Antlr.csproj
index 0c740e7..7a44581 100644
--- a/src/Thrift.Net.Antlr/Thrift.Net.Antlr.csproj
+++ b/src/Thrift.Net.Antlr/Thrift.Net.Antlr.csproj
@@ -6,7 +6,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Antlr4.Runtime.Standard" Version="4.9.1" />
+    <PackageReference Include="Antlr4.Runtime.Standard" Version="4.11.1" />
     <PackageReference Include="StyleCop.Analyzers" Version="1.1.118">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>