diff --git a/Changes.md b/Changes.md
index f4d5973..20b177a 100644
--- a/Changes.md
+++ b/Changes.md
@@ -1,4 +1,4 @@
-3.0.0ax
+3.0.0a4
 =======
 
 - Dockerfile :
diff --git a/build.py b/build.py
index 5226d78..5913931 100755
--- a/build.py
+++ b/build.py
@@ -50,7 +50,7 @@
 parser.add_argument(
 	"--build-env-version",
 	dest = "buildEnvVersion",
-	default = "3.0.0a3",
+	default = "3.0.0a4",
 	help = "The container image tag to use for docker builds."
 )