diff --git a/README.md b/README.md
index 535e019..1b8e5fd 100644
--- a/README.md
+++ b/README.md
@@ -110,11 +110,11 @@ The race detector can be enabled by setting `XK6_RACE_DETECTOR=1`.
 
 ```go
 builder := xk6.Builder{
-	k6Version: "v0.35.0",
+	K6Version: "v0.35.0",
 	Extensions: []xk6.Dependency{
 		{
-			ModulePath: "github.com/grafana/xk6-browser",
-			Version:    "v0.1.1",
+			PackagePath: "github.com/grafana/xk6-browser",
+			Version:     "v0.1.1",
 		},
 	},
 }
diff --git a/builder.go b/builder.go
index f7e05cf..e818ac9 100644
--- a/builder.go
+++ b/builder.go
@@ -139,7 +139,7 @@ type Dependency struct {
 	// The name (import path) of the Go package. If at a version > 1,
 	// it should contain semantic import version (i.e. "/v2").
 	// Used with `go get`.
-	PackagePath string `json:"module_path,omitempty"`
+	PackagePath string `json:"package_path,omitempty"`
 
 	// The version of the Go module, as used with `go get`.
 	Version string `json:"version,omitempty"`