diff --git a/runtime/CSharp/Antlr4.Runtime/Properties/AssemblyInfo.cs b/runtime/CSharp/Antlr4.Runtime/Properties/AssemblyInfo.cs
index cd9aaf725..af2883d4a 100644
--- a/runtime/CSharp/Antlr4.Runtime/Properties/AssemblyInfo.cs
+++ b/runtime/CSharp/Antlr4.Runtime/Properties/AssemblyInfo.cs
@@ -80,5 +80,5 @@ using System.Runtime.InteropServices;
 [assembly: AssemblyVersion("4.2.0.0")]
 #if !NET_CF
 [assembly: AssemblyFileVersion("4.2.0.0")]
-[assembly: AssemblyInformationalVersion("4.2.0-alpha001")]
+[assembly: AssemblyInformationalVersion("4.2.0-dev")]
 #endif
diff --git a/runtime/CSharp/Antlr4BuildTasks/Properties/AssemblyInfo.cs b/runtime/CSharp/Antlr4BuildTasks/Properties/AssemblyInfo.cs
index c89ca6efe..c1762f175 100644
--- a/runtime/CSharp/Antlr4BuildTasks/Properties/AssemblyInfo.cs
+++ b/runtime/CSharp/Antlr4BuildTasks/Properties/AssemblyInfo.cs
@@ -70,4 +70,4 @@ using System.Runtime.InteropServices;
 // [assembly: AssemblyVersion("1.0.*")]
 [assembly: AssemblyVersion("4.2.0.0")]
 [assembly: AssemblyFileVersion("4.2.0.0")]
-[assembly: AssemblyInformationalVersion("4.2.0-alpha001")]
+[assembly: AssemblyInformationalVersion("4.2.0-dev")]