diff --git a/cmd/server/main.go b/cmd/server/main.go
index f766938..8077751 100644
--- a/cmd/server/main.go
+++ b/cmd/server/main.go
@@ -93,7 +93,7 @@ type Options struct {
 }
 
 func main() {
-	var version = "0.1.1" // set version number
+	var version = common.Version
 
 	opts := &Options{}
 	flag.StringVar(&opts.bindAddr, "bind-addr", "127.0.0.1:9069", "the address to listen on")
diff --git a/common/version.go b/common/version.go
new file mode 100644
index 0000000..4b979c6
--- /dev/null
+++ b/common/version.go
@@ -0,0 +1,14 @@
+package common
+
+// Version is the single source of truth for this daemon's version.
+//
+// It was previously duplicated as a literal in two places that could drift:
+// cmd/server/main.go's --version output and the Version field of the LightdInfo
+// gRPC reply in frontend/service.go. The gRPC one is the load-bearing copy --
+// it is walletrpc/service.proto:48, so every client and every operator probe
+// reads it, and it is the only way to tell from off-box which build a node is
+// running.
+const Version = "0.1.2"
+
+// VersionString is what GetLightdInfo advertises to clients.
+const VersionString = Version + "-dragonxlightd"
diff --git a/frontend/service.go b/frontend/service.go
index 10f932c..608cf60 100644
--- a/frontend/service.go
+++ b/frontend/service.go
@@ -353,7 +353,7 @@ func (s *SqlStreamer) GetLightdInfo(ctx context.Context, in *walletrpc.Empty) (*
 	// TODO these are called Error but they aren't at the moment.
 	// A success will return code 0 and message txhash.
 	return &walletrpc.LightdInfo{
-		Version:                 "0.1.1-dragonxlightd",
+		Version:                 common.VersionString,
 		Vendor:                  "DragonX LightWalletD",
 		TaddrSupport:            true,
 		ChainName:               chainName,