diff --git a/pkg/acsengine/defaults.go b/pkg/acsengine/defaults.go
index ac6dadf490..9493ccd93e 100644
--- a/pkg/acsengine/defaults.go
+++ b/pkg/acsengine/defaults.go
@@ -21,7 +21,7 @@ const (
 	// AzureCniPluginVer specifies version of Azure CNI plugin, which has been mirrored from
 	// https://github.com/Azure/azure-container-networking/releases/download/${AZURE_PLUGIN_VER}/azure-vnet-cni-linux-amd64-${AZURE_PLUGIN_VER}.tgz
 	// to https://acs-mirror.azureedge.net/cni/
-	AzureCniPluginVer = "v1.0.6"
+	AzureCniPluginVer = "v1.0.4"
 	// CNIPluginVer specifies the version of CNI implementation
 	// https://github.com/containernetworking/plugins
 	CNIPluginVer = "v0.7.0"