diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 5ffb9789..fefff9a8 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -81,9 +81,8 @@ In section *blockbook* update information how to build and configure Blockbook s
 
 Update *package_maintainer* and *package_maintainer_email* options in section *meta*.
 
-Execute script *contrib/scripts/check-ports.go* that will check mandatory ports and uniquity of registered ports.
-
-Execute script *contrib/scripts/generate-port-registry.go* that will update *docs/ports.md*.
+Execute script *go run contrib/scripts/check-and-generate-port-registry.go -w* that checks mandatory ports and 
+uniqueness of ports and updates registry of ports *docs/ports.md*.
 
 Now you can try generate package definitions as described above in order to check outputs.
 
diff --git a/contrib/scripts/generate-port-registry.go b/contrib/scripts/check-and-generate-port-registry.go
similarity index 80%
rename from contrib/scripts/generate-port-registry.go
rename to contrib/scripts/check-and-generate-port-registry.go
index 20375eea..94e7c2c4 100755
--- a/contrib/scripts/generate-port-registry.go
+++ b/contrib/scripts/check-and-generate-port-registry.go
@@ -36,6 +36,67 @@ type Config struct {
 	Ports map[string]uint16 `json:"ports"`
 }
 
+func checkPorts() int {
+	ports := make(map[uint16][]string)
+	status := 0
+
+	files, err := ioutil.ReadDir(inputDir)
+	if err != nil {
+		panic(err)
+	}
+
+	for _, fi := range files {
+		if fi.IsDir() || fi.Name()[0] == '.' {
+			continue
+		}
+
+		path := filepath.Join(inputDir, fi.Name())
+		f, err := os.Open(path)
+		if err != nil {
+			panic(fmt.Errorf("%s: %s", path, err))
+		}
+		defer f.Close()
+
+		v := Config{}
+		d := json.NewDecoder(f)
+		err = d.Decode(&v)
+		if err != nil {
+			panic(fmt.Errorf("%s: json: %s", path, err))
+		}
+
+		if _, ok := v.Ports["blockbook_internal"]; !ok {
+			fmt.Printf("%s: missing blockbook_internal port\n", v.Coin.Name)
+			status = 1
+		}
+		if _, ok := v.Ports["blockbook_public"]; !ok {
+			fmt.Printf("%s: missing blockbook_public port\n", v.Coin.Name)
+			status = 1
+		}
+		if _, ok := v.Ports["backend_rpc"]; !ok {
+			fmt.Printf("%s: missing backend_rpc port\n", v.Coin.Name)
+			status = 1
+		}
+
+		for _, port := range v.Ports {
+			if port > 0 {
+				ports[port] = append(ports[port], v.Coin.Name)
+			}
+		}
+	}
+
+	for port, coins := range ports {
+		if len(coins) > 1 {
+			fmt.Printf("port %d: registered by %q\n", port, coins)
+			status = 1
+		}
+	}
+
+	if status != 0 {
+		fmt.Println("Got some errors")
+	}
+	return status
+}
+
 func main() {
 	output := "stdout"
 	if len(os.Args) > 1 {
@@ -48,6 +109,11 @@ func main() {
 		}
 	}
 
+	status := checkPorts()
+	if status != 0 {
+		os.Exit(status)
+	}
+
 	slice, err := loadPortInfo(inputDir)
 	if err != nil {
 		panic(err)
diff --git a/contrib/scripts/check-ports.go b/contrib/scripts/check-ports.go
deleted file mode 100755
index 1e509de1..00000000
--- a/contrib/scripts/check-ports.go
+++ /dev/null
@@ -1,83 +0,0 @@
-//usr/bin/go run $0 $@ ; exit
-package main
-
-import (
-	"encoding/json"
-	"fmt"
-	"io/ioutil"
-	"os"
-	"path/filepath"
-)
-
-const configDir = "configs/coins"
-
-type Config struct {
-	Coin struct {
-		Name string `json:"name"`
-	}
-	Ports map[string]uint16 `json:"ports"`
-}
-
-func main() {
-	ports := make(map[uint16][]string)
-	status := 0
-
-	files, err := ioutil.ReadDir(configDir)
-	if err != nil {
-		panic(err)
-	}
-
-	for _, fi := range files {
-		if fi.IsDir() || fi.Name()[0] == '.' {
-			continue
-		}
-
-		path := filepath.Join(configDir, fi.Name())
-		f, err := os.Open(path)
-		if err != nil {
-			panic(fmt.Errorf("%s: %s", path, err))
-		}
-		defer f.Close()
-
-		v := Config{}
-		d := json.NewDecoder(f)
-		err = d.Decode(&v)
-		if err != nil {
-			panic(fmt.Errorf("%s: json: %s", path, err))
-		}
-
-		if _, ok := v.Ports["blockbook_internal"]; !ok {
-			fmt.Printf("%s: missing blockbook_internal port\n", v.Coin.Name)
-			status = 1
-		}
-		if _, ok := v.Ports["blockbook_public"]; !ok {
-			fmt.Printf("%s: missing blockbook_public port\n", v.Coin.Name)
-			status = 1
-		}
-		if _, ok := v.Ports["backend_rpc"]; !ok {
-			fmt.Printf("%s: missing backend_rpc port\n", v.Coin.Name)
-			status = 1
-		}
-
-		for _, port := range v.Ports {
-			if port > 0 {
-				ports[port] = append(ports[port], v.Coin.Name)
-			}
-		}
-	}
-
-	for port, coins := range ports {
-		if len(coins) > 1 {
-			fmt.Printf("port %d: registered by %q\n", port, coins)
-			status = 1
-		}
-	}
-
-	if status == 0 {
-		fmt.Println("OK")
-	} else {
-		fmt.Println("Got some errors")
-	}
-
-	os.Exit(status)
-}
diff --git a/docs/ports.md b/docs/ports.md
index 77072825..e400f01d 100644
--- a/docs/ports.md
+++ b/docs/ports.md
@@ -8,7 +8,7 @@
 | Dash                     | 9033                    | 9133                  | 8033             | 38333                       |
 | Litecoin                 | 9034                    | 9134                  | 8034             | 38334                       |
 | Bgold                    | 9035                    | 9135                  | 8035             | 38335                       |
-| Ethereum                 | 9036                    | 9136                  | 8036             | 38336 p2p, 8136 http        |
+| Ethereum                 | 9036                    | 9136                  | 8036             | 8136 http, 38336 p2p        |
 | Ethereum Classic         | 9037                    | 9137                  | 8037             |                             |
 | Dogecoin                 | 9038                    | 9138                  | 8038             | 38338                       |
 | Namecoin                 | 9039                    | 9139                  | 8039             | 38339                       |