diff --git a/http/render/json.go b/http/render/json.go
index 70dbfb7..a238205 100644
--- a/http/render/json.go
+++ b/http/render/json.go
@@ -14,8 +14,11 @@ const JSONContentType = "application/json"
 
 // APIError contains error information that is rendered by JSONError.
 type APIError struct {
-	Code   int    `json:"code"`
-	Reason string `json:"reason"`
+	// Code is the http status code.
+	Code int `json:"code"`
+
+	// Error is the reason for the error.
+	Error string `json:"error"`
 }
 
 // JSONInternalServerError writes a JSON internal server error.
@@ -33,10 +36,10 @@ func JSONError(rw http.ResponseWriter, code int, reason string) {
 	rw.Header().Set("Content-Type", JSONContentType)
 	rw.WriteHeader(code)
 
-	apiErr := APIError{Code: code, Reason: reason}
+	apiErr := APIError{Code: code, Error: reason}
 	b, err := jsoniter.Marshal(apiErr)
 	if err != nil {
-		_, _ = rw.Write([]byte(`{"reason":"Internal Server Error"}`))
+		_, _ = rw.Write([]byte(`{"code":500,"error":"internal server error"}`))
 	}
 
 	_, _ = rw.Write(b)
diff --git a/http/render/json_test.go b/http/render/json_test.go
index e63a81a..b61c9eb 100644
--- a/http/render/json_test.go
+++ b/http/render/json_test.go
@@ -15,7 +15,7 @@ func TestJSONInternalServerError(t *testing.T) {
 
 	render.JSONInternalServerError(rec)
 
-	want := `{"code":500,"reason":"internal server error"}`
+	want := `{"code":500,"error":"internal server error"}`
 	assert.Equal(t, http.StatusInternalServerError, rec.Code)
 	assert.Equal(t, "application/json", rec.Header().Get("Content-Type"))
 	assert.Equal(t, want, rec.Body.String())
@@ -26,7 +26,7 @@ func TestJSONErrorf(t *testing.T) {
 
 	render.JSONErrorf(rec, http.StatusBadRequest, "test %s", "message")
 
-	want := `{"code":400,"reason":"test message"}`
+	want := `{"code":400,"error":"test message"}`
 	assert.Equal(t, http.StatusBadRequest, rec.Code)
 	assert.Equal(t, "application/json", rec.Header().Get("Content-Type"))
 	assert.Equal(t, want, rec.Body.String())
@@ -37,7 +37,7 @@ func TestJSONError(t *testing.T) {
 
 	render.JSONError(rec, http.StatusBadRequest, "test message")
 
-	want := `{"code":400,"reason":"test message"}`
+	want := `{"code":400,"error":"test message"}`
 	assert.Equal(t, http.StatusBadRequest, rec.Code)
 	assert.Equal(t, "application/json", rec.Header().Get("Content-Type"))
 	assert.Equal(t, want, rec.Body.String())