diff --git a/cmd/abci-cli/abci-cli.go b/cmd/abci-cli/abci-cli.go
index 1b08b76ab..accae9d1e 100644
--- a/cmd/abci-cli/abci-cli.go
+++ b/cmd/abci-cli/abci-cli.go
@@ -12,6 +12,7 @@ import (
 
 	"github.com/tendermint/abci/client"
 	"github.com/tendermint/abci/types"
+	"github.com/tendermint/abci/version"
 	"github.com/urfave/cli"
 )
 
@@ -43,7 +44,7 @@ func main() {
 	app := cli.NewApp()
 	app.Name = "abci-cli"
 	app.Usage = "abci-cli [command] [args...]"
-	app.Version = "0.3.0" // hex handling
+	app.Version = version.Version
 	app.Flags = []cli.Flag{
 		cli.StringFlag{
 			Name:  "address",
diff --git a/version/version.go b/version/version.go
new file mode 100644
index 000000000..04695d9b8
--- /dev/null
+++ b/version/version.go
@@ -0,0 +1,9 @@
+package version
+
+// NOTE: we should probably be versioning the ABCI and the abci-cli separately
+
+const Maj = "0"
+const Min = "4"
+const Fix = "0"
+
+const Version = "0.4.0" // new Query args and response (with proof!)