diff --git a/Makefile b/Makefile
index b5fea5f..8c1d844 100644
--- a/Makefile
+++ b/Makefile
@@ -1,12 +1,21 @@
 VERSION := $(shell git describe --tags --always)
+CONFIG_URL := https://cfg.rpchub.io/agg/op-default.json
 
-GOLDFLAGS += -X github.com/BlockPILabs/aggregator/version.Version=$(VERSION)
+GOLDFLAGS := -X github.com/BlockPILabs/aggregator/version.Version=$(VERSION)
+GO_OPLDFLAGS := -X github.com/BlockPILabs/aggregator/config.DefaultConfigUrl=$(CONFIG_URL)
 GOFLAGS = -ldflags "$(GOLDFLAGS)"
 
+
 all: build
 
 .PHONY: build
 build:
-	go build $(GOFLAGS) -o ./build/ ./cmd/aggregator
+	CGO_ENABLED=0 go build -ldflags "$(GOLDFLAGS)" -o ./build/ ./cmd/aggregator
+build-op:
+	CGO_ENABLED=0 go build -ldflags "$(GOLDFLAGS) $(GO_OPLDFLAGS)"  -o ./build/ ./cmd/aggregator
+#build-windows:
+#	CGO_ENABLED=0 GOOS=windows GOARCH=amd64 go build $(GOFLAGS) -o ./build/ ./cmd/aggregator
+#build-mac:
+#	CGO_ENABLED=0 GOOS=darwin GOARCH=arm64 go build $(GOFLAGS) -o ./build/ ./cmd/aggregator
 clean:
 	rm -rf build/*
diff --git a/README.md b/README.md
index e4d3836..7bb25ee 100644
--- a/README.md
+++ b/README.md
@@ -39,4 +39,4 @@ curl -u rpchub:<password> -X POST 'http://localhost:8012/config' --header 'Conte
 ## Reset configuration
 1. Stop the aggregator. 
 2. Delete the configuration directory `rm -rf $HOME/.rpchub/aggregator/`.
-3. Restart the aggregator
+3. Restart the aggregator
\ No newline at end of file
diff --git a/config/config.go b/config/config.go
index a45a943..b1bde1c 100644
--- a/config/config.go
+++ b/config/config.go
@@ -18,7 +18,7 @@ import (
 var (
 	logger            = log.Module("config")
 	locker            = sync.Mutex{}
-	defaultConfigUrl  = "https://cfg.rpchub.io/agg/default.json"
+	DefaultConfigUrl  = "https://cfg.rpchub.io/agg/default.json"
 	defaultPhishingDb = "https://cfg.rpchub.io/agg/scam-addresses.json"
 
 	_Config = &Config{
@@ -94,7 +94,7 @@ func LoadDefault() *Config {
 
 	retries := 0
 	for {
-		statusCode, data, err := (&fasthttp.Client{}).GetTimeout(nil, defaultConfigUrl, time.Second*5)
+		statusCode, data, err := (&fasthttp.Client{}).GetTimeout(nil, DefaultConfigUrl, time.Second*5)
 		if err == nil && statusCode == 200 {
 			err = json.Unmarshal(data, &cfg)
 			if err == nil {
diff --git a/funding.json b/funding.json
new file mode 100644
index 0000000..a8c8dbd
--- /dev/null
+++ b/funding.json
@@ -0,0 +1,5 @@
+{
+  "opRetro": {
+    "projectId": "0xc8baf94c13404f1f5f1fb13de286c052bae58919ca80fd2be5d61312be096b35"
+  }
+}