diff --git a/build/version.ps1 b/build/version.ps1
index 305e90dd9..303163a0c 100644
--- a/build/version.ps1
+++ b/build/version.ps1
@@ -1 +1 @@
-$AntlrVersion = "4.2.2-alpha001"
+$AntlrVersion = "4.2.2-dev"
diff --git a/runtime/CSharp/Antlr4.Runtime/Properties/AssemblyInfo.cs b/runtime/CSharp/Antlr4.Runtime/Properties/AssemblyInfo.cs
index 4fc22707f..ffd421f17 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("4.2.2.0")]
-[assembly: AssemblyInformationalVersion("4.2.2-alpha001")]
+[assembly: AssemblyInformationalVersion("4.2.2-dev")]
 #endif
diff --git a/runtime/CSharp/Antlr4BuildTasks/Properties/AssemblyInfo.cs b/runtime/CSharp/Antlr4BuildTasks/Properties/AssemblyInfo.cs
index 0cc203f4c..2d1d62a0b 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("4.2.2.0")]
-[assembly: AssemblyInformationalVersion("4.2.2-alpha001")]
+[assembly: AssemblyInformationalVersion("4.2.2-dev")]