diff --git a/.github/workflows/go.yml b/.github/workflows/go.yml
index e9a166e..4bf7a8e 100644
--- a/.github/workflows/go.yml
+++ b/.github/workflows/go.yml
@@ -1,20 +1,59 @@
 name: build
-on: [push]
+on: [push, pull_request]
 jobs:
 
-  build:
-    name: Build
+  test:
+    name: Test
     runs-on: ubuntu-latest
     steps:
-
       - name: Set up Go 1.14
         uses: actions/setup-go@v1
         with:
           go-version: 1.14
         id: go
-
-      - name: Check out code into the Go module directory
+      - name: Check out
         uses: actions/checkout@v2
-
       - name: Test
         run: go test -v ./...
+
+  build-1-13:
+    name: Build on Go 1.13
+    runs-on: ubuntu-latest
+    steps:
+      - name: Set up Go 1.13
+        uses: actions/setup-go@v1
+        with:
+          go-version: 1.13
+        id: go
+      - name: Check out
+        uses: actions/checkout@v2
+      - name: Build
+        run: go build .
+
+  build-1-12:
+    name: Build on Go 1.12
+    runs-on: ubuntu-latest
+    steps:
+      - name: Set up Go 1.12
+        uses: actions/setup-go@v1
+        with:
+          go-version: 1.12
+        id: go
+      - name: Check out
+        uses: actions/checkout@v2
+      - name: Build
+        run: go build .
+
+  build-1-11:
+    name: Build on Go 1.11
+    runs-on: ubuntu-latest
+    steps:
+      - name: Set up Go 1.11
+        uses: actions/setup-go@v1
+        with:
+          go-version: 1.11
+        id: go
+      - name: Check out
+        uses: actions/checkout@v2
+      - name: Build
+        run: go build .
diff --git a/codegen/codegen.go b/codegen/codegen.go
index 8efc0e4..69ca195 100644
--- a/codegen/codegen.go
+++ b/codegen/codegen.go
@@ -23,7 +23,7 @@ func Generate(projectName, frontend string) {
 func (g generator) generate() {
 	fmt.Println("Generating", g.projectName)
 	for path, srcText := range static.Sources() {
-		srcText = strings.ReplaceAll(srcText, "project-name", g.projectName)
+		srcText = strings.Replace(srcText, "project-name", g.projectName, -1)
 		binary := []byte(srcText)
 		g.processFile(path, binary)
 	}