diff --git a/.github/workflows/integration-test.yml b/.github/workflows/integration-test.yml
index a2f7890b..be6a261e 100644
--- a/.github/workflows/integration-test.yml
+++ b/.github/workflows/integration-test.yml
@@ -38,3 +38,11 @@ jobs:
       uses: ./
       with:
         entrypoint: example/one-of/entrypoint.sh
+    - name: Run stub subfolders example
+      uses: ./
+      with:
+        entrypoint: example/stub-subfolders/entrypoint.sh
+    - name: Run no go_package example
+      uses: ./
+      with:
+        entrypoint: example/no-gopackage/entrypoint.sh
diff --git a/.gitignore b/.gitignore
index 00f277dc..eadf978d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,4 @@ pkged.go
 gripmock
 .idea
 .DS_Store
+protogen
diff --git a/example/no-gopackage/bar/bar.proto b/example/no-gopackage/bar/bar.proto
new file mode 100644
index 00000000..e8fd8511
--- /dev/null
+++ b/example/no-gopackage/bar/bar.proto
@@ -0,0 +1,6 @@
+syntax = "proto3";
+package bar;
+
+message Bar{
+    string name = 1;
+}
diff --git a/example/no-gopackage/bar/deep/bar.proto b/example/no-gopackage/bar/deep/bar.proto
new file mode 100644
index 00000000..1befae86
--- /dev/null
+++ b/example/no-gopackage/bar/deep/bar.proto
@@ -0,0 +1,6 @@
+syntax = "proto3";
+package bar;
+
+message DeepBar{
+    string address = 1;
+}
diff --git a/example/no-gopackage/client/main.go b/example/no-gopackage/client/main.go
new file mode 100644
index 00000000..b2d7c445
--- /dev/null
+++ b/example/no-gopackage/client/main.go
@@ -0,0 +1,38 @@
+package main
+
+import (
+	"context"
+	"log"
+	"os"
+	"time"
+
+	pb "github.com/tokopedia/gripmock/protogen/example/no-gopackage"
+	no_gopackage "github.com/tokopedia/gripmock/protogen/example/no-gopackage/bar"
+	"google.golang.org/grpc"
+)
+
+//go:generate protoc --go_out=plugins=grpc:${GOPATH}/src -I=../../protogen ../hello.proto ../foo.proto ../bar/bar.proto ../bar/deep/bar.proto
+func main() {
+	ctx, cancel := context.WithTimeout(context.Background(), time.Second*5)
+	defer cancel()
+
+	// Set up a connection to the server.
+	conn, err := grpc.DialContext(ctx, "localhost:4770", grpc.WithInsecure(), grpc.WithBlock())
+	if err != nil {
+		log.Fatalf("did not connect: %v", err)
+	}
+	defer conn.Close()
+
+	c := pb.NewGripmockClient(conn)
+
+	// Contact the server and print out its response.
+	name := "tokopedia"
+	if len(os.Args) > 1 {
+		name = os.Args[1]
+	}
+	r, err := c.Greet(context.Background(), &no_gopackage.Bar{Name: name})
+	if err != nil {
+		log.Fatalf("error from grpc: %v", err)
+	}
+	log.Printf("Greeting: %s\nAddress:%s", r.Response, r.Deepbar.Address)
+}
diff --git a/example/no-gopackage/entrypoint.sh b/example/no-gopackage/entrypoint.sh
new file mode 100755
index 00000000..e10bcb63
--- /dev/null
+++ b/example/no-gopackage/entrypoint.sh
@@ -0,0 +1,13 @@
+#!/usr/bin/env sh
+
+# this file is used by .github/workflows/integration-test.yml
+
+gripmock --stub=example/no-gopackage/stub \
+  example/no-gopackage/foo.proto example/no-gopackage/hello.proto \
+  example/no-gopackage/bar/bar.proto \
+  example/no-gopackage/bar/deep/bar.proto &
+
+# wait for generated files to be available and gripmock is up
+sleep 2
+
+go run example/no-gopackage/client/*.go
\ No newline at end of file
diff --git a/example/no-gopackage/foo.proto b/example/no-gopackage/foo.proto
new file mode 100644
index 00000000..dfee27c1
--- /dev/null
+++ b/example/no-gopackage/foo.proto
@@ -0,0 +1,12 @@
+syntax = "proto3";
+
+// simulating neighboring .proto file
+// but different package
+package foo;
+
+import "bar/deep/bar.proto";
+
+message Response {
+    string response = 1;
+    bar.DeepBar deepbar = 2;
+}
diff --git a/example/no-gopackage/hello.proto b/example/no-gopackage/hello.proto
new file mode 100644
index 00000000..14435d99
--- /dev/null
+++ b/example/no-gopackage/hello.proto
@@ -0,0 +1,11 @@
+syntax = "proto3";
+
+package multi_package;
+
+import "bar/bar.proto";
+import "foo.proto";
+
+service Gripmock {
+    rpc Greet (bar.Bar) returns (foo.Response);
+}
+
diff --git a/example/no-gopackage/stub/simple.json b/example/no-gopackage/stub/simple.json
new file mode 100644
index 00000000..38c6eb21
--- /dev/null
+++ b/example/no-gopackage/stub/simple.json
@@ -0,0 +1,17 @@
+{
+ "service":"Gripmock",
+  "method":"Greet",
+  "input":{
+    "equals":{
+      "name":"tokopedia"
+    }
+  },
+  "output":{
+    "data":{
+      "response":"Hello Tokopedia",
+      "deepbar": {
+        "address": "Jakarta"
+      }
+    }
+  }
+}
\ No newline at end of file
diff --git a/fix_gopackage.sh b/fix_gopackage.sh
new file mode 100755
index 00000000..94d61119
--- /dev/null
+++ b/fix_gopackage.sh
@@ -0,0 +1,33 @@
+#!/bin/bash
+
+protos=("$@")
+
+for proto in "${protos[@]}"
+do
+  if grep '^option go_package' $proto;then
+   echo "option go_package detected in $proto, no need to append"
+   exit 1
+  fi
+done
+
+for proto in "${protos[@]}"
+do
+  if [[ -d $proto ]]; then
+    continue
+  fi
+
+  dir=${proto%/*}
+  file=${proto##*/}
+
+  newdir="protogen/$dir"
+  newfile="$newdir/$file"
+  # copy to protogen directory
+  mkdir -p "$newdir" && cp "$proto" "$_"
+
+  syntaxLineNum="$(grep -n "syntax" "$newfile" | head -n 1 | cut -d: -f1)"
+
+  goPackageString="option go_package = \"github.com/tokopedia/gripmock/protogen/$dir\";"
+  sed -i "${syntaxLineNum}s~$~\n$goPackageString~" $newfile
+  echo $newfile
+done
+
diff --git a/gripmock.go b/gripmock.go
index 18a05f4a..c02ae202 100644
--- a/gripmock.go
+++ b/gripmock.go
@@ -1,6 +1,7 @@
 package main
 
 import (
+	"bytes"
 	"flag"
 	"fmt"
 	"log"
@@ -85,12 +86,6 @@ func main() {
 	}
 }
 
-func getProtoName(path string) string {
-	paths := strings.Split(path, "/")
-	filename := paths[len(paths)-1]
-	return strings.Split(filename, ".")[0]
-}
-
 type protocParam struct {
 	protoPath   []string
 	adminPort   string
@@ -101,6 +96,7 @@ type protocParam struct {
 }
 
 func generateProtoc(param protocParam) {
+	param.protoPath = fixGoPackage(param.protoPath)
 	protodirs := strings.Split(param.protoPath[0], "/")
 	protodir := ""
 	if len(protodirs) > 0 {
@@ -130,16 +126,19 @@ func generateProtoc(param protocParam) {
 
 }
 
-func buildServer(output string) {
-	args := []string{"build", "-o", output + "grpcserver", output}
-
-	build := exec.Command("go", args...)
-	build.Stdout = os.Stdout
-	build.Stderr = os.Stderr
-	err := build.Run()
+// append gopackage in proto files if doesn't have any
+func fixGoPackage(protoPaths []string) []string {
+	fixgopackage := exec.Command("fix_gopackage.sh", protoPaths...)
+	buf := &bytes.Buffer{}
+	fixgopackage.Stdout = buf
+	fixgopackage.Stderr = os.Stderr
+	err := fixgopackage.Run()
 	if err != nil {
-		log.Fatal(err)
+		log.Println("error on fixGoPackage", err)
+		return protoPaths
 	}
+
+	return strings.Split(strings.TrimRight(buf.String(), "\n"), "\n")
 }
 
 func runGrpcServer(output string) (*exec.Cmd, <-chan error) {