diff --git a/config/base_config.go b/config/base_config.go
index 63bdc9f..8164970 100644
--- a/config/base_config.go
+++ b/config/base_config.go
@@ -2,7 +2,6 @@ package config
 
 import (
 	"errors"
-	"github.com/open-policy-agent/opa/rego"
 	"log"
 	"net/http"
 	"time"
@@ -18,8 +17,6 @@ type Config struct {
 	// You must set either URL or Policy.
 	Policy string `json:"policy,omitempty"`
 
-	instantiatedPolicy *rego.PreparedEvalQuery
-
 	// Query is the name of the policy to query.
 	Query string `json:"query,omitempty"`
 
@@ -31,13 +28,15 @@ type Config struct {
 	ExceptedResult bool `json:"excepted_result,omitempty"`
 
 	// DeniedStatusCode is the status code that should be returned if the request is denied.
+	// Default to http.StatusForbidden.
 	DeniedStatusCode int `json:"denied_status,omitempty"`
 
 	// DeniedMessage is the message that should be returned if the request is denied.
+	// Default to "Forbidden".
 	DeniedMessage string `json:"denied_message,omitempty"`
 
-	// Headers is a list of headers to send to the OPA server.
-	// All headers are sent to the OPA server except those in the IgnoredHeaders list.
+	// Headers is a list of headers to send to the OPA server in addition.
+	// All headers in the request are sent to the OPA server except those in the IgnoredHeaders list.
 	Headers map[string][]string `json:"headers,omitempty"`
 
 	// IgnoredHeaders is a list of headers to ignore when sending to the OPA server.
@@ -61,6 +60,12 @@ func (c *Config) Validate() error {
 			c.Logger = log.Default()
 		}
 	}
+	if c.DeniedStatusCode == 0 {
+		c.DeniedStatusCode = http.StatusForbidden
+	}
+	if c.DeniedMessage == "" {
+		c.DeniedMessage = "Forbidden"
+	}
 	if c.Timeout == 0 {
 		c.Timeout = 10 * time.Second
 	}
diff --git a/config/base_config_test.go b/config/base_config_test.go
index d4c2025..435f99f 100644
--- a/config/base_config_test.go
+++ b/config/base_config_test.go
@@ -1,7 +1,6 @@
 package config
 
 import (
-	"github.com/open-policy-agent/opa/rego"
 	"log"
 	"net/http"
 	"testing"
@@ -12,7 +11,6 @@ func TestConfig_Validate(t *testing.T) {
 	type fields struct {
 		URL                 string
 		Policy              string
-		instantiatedPolicy  *rego.PreparedEvalQuery
 		Query               string
 		InputCreationMethod func(r *http.Request) (map[string]interface{}, error)
 		ExceptedResult      bool
@@ -110,7 +108,6 @@ func TestConfig_Validate(t *testing.T) {
 			c := &Config{
 				URL:                 tt.fields.URL,
 				Policy:              tt.fields.Policy,
-				instantiatedPolicy:  tt.fields.instantiatedPolicy,
 				Query:               tt.fields.Query,
 				InputCreationMethod: tt.fields.InputCreationMethod,
 				ExceptedResult:      tt.fields.ExceptedResult,
diff --git a/fiber_middleware.go b/fiber_middleware.go
index 852c591..2b58f63 100644
--- a/fiber_middleware.go
+++ b/fiber_middleware.go
@@ -9,7 +9,7 @@ import (
 	"net/http"
 )
 
-// InputCreationMethod is the method that is used to create the input for the policy.
+// FiberInputCreationMethod is the method that is used to create the input for the policy.
 type FiberInputCreationMethod func(c *fiber.Ctx) (map[string]interface{}, error)
 
 type FiberMiddleware struct {
@@ -40,7 +40,7 @@ func NewFiberMiddleware(cfg *config.Config, input FiberInputCreationMethod) (*Fi
 func (g *FiberMiddleware) Use() func(c *fiber.Ctx) error {
 	return func(c *fiber.Ctx) error {
 		if g.Config.Debug {
-			g.Config.Logger.Printf("[opa-middleware-fiber] Request: %s", c.Request().URI())
+			g.Config.Logger.Printf("[opa-middleware-fiber] Request received")
 		}
 		result, err := g.query(c)
 		if err != nil {
diff --git a/gin_middleware.go b/gin_middleware.go
index fa66de7..9a2d32b 100644
--- a/gin_middleware.go
+++ b/gin_middleware.go
@@ -12,7 +12,7 @@ type GinInputCreationMethod func(c *gin.Context) (map[string]interface{}, error)
 
 type GinMiddleware struct {
 	Config *config.Config
-	// BindingMethod is a function that returns the value to be sent to the OPA server.
+	// InputCreationMethod is a function that returns the value to be sent to the OPA server.
 	InputCreationMethod GinInputCreationMethod `json:"binding_method,omitempty"`
 }
 
@@ -44,7 +44,7 @@ func NewGinMiddleware(cfg *config.Config, input GinInputCreationMethod) (*GinMid
 func (g *GinMiddleware) Use() func(c *gin.Context) {
 	return func(c *gin.Context) {
 		if g.Config.Debug {
-			g.Config.Logger.Printf("[opa-middleware-gin] Request: %s", c.Request.URL.String())
+			g.Config.Logger.Printf("[opa-middleware-gin] Request received")
 		}
 		result, err := g.query(c)
 		if err != nil {
diff --git a/http_middleware.go b/http_middleware.go
index 83d8722..e2cc143 100644
--- a/http_middleware.go
+++ b/http_middleware.go
@@ -31,7 +31,7 @@ func NewHTTPMiddleware(cfg *config.Config, next http.Handler) (*HTTPMiddleware,
 // ServeHTTP serves the http request. Act as Use acts in other frameworks.
 func (h *HTTPMiddleware) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
 	if h.Config.Debug {
-		h.Config.Logger.Printf("[opa-middleware-http] Request: %s", req.URL.String())
+		h.Config.Logger.Printf("[opa-middleware-http] Request received")
 	}
 	result, err := h.query(req)
 	if err != nil {