diff --git a/q3rcon.go b/q3rcon.go
index ca287c6..05bf60a 100644
--- a/q3rcon.go
+++ b/q3rcon.go
@@ -14,12 +14,12 @@ import (
 const respBufSiz = 2048
 
 type encoder interface {
-	Encode(cmd string) ([]byte, error)
+	encode(cmd string) ([]byte, error)
 }
 
 type decoder interface {
-	IsValid(buf []byte) bool
-	Decode(buf []byte) string
+	isValid(buf []byte) bool
+	decode(buf []byte) string
 }
 
 type Rcon struct {
@@ -101,7 +101,7 @@ func (r Rcon) Send(cmdWithArgs string) (string, error) {
 
 	go r.listen(timeout, respChan, errChan)
 
-	encodedCmd, err := r.request.Encode(cmdWithArgs)
+	encodedCmd, err := r.request.encode(cmdWithArgs)
 	if err != nil {
 		return "", fmt.Errorf("error encoding command: %w", err)
 	}
@@ -153,8 +153,8 @@ func (r Rcon) listen(timeout time.Duration, respChan chan<- string, errChan chan
 				}
 			}
 
-			if r.response.IsValid(respBuf[:rlen]) {
-				sb.WriteString(r.response.Decode(respBuf[:rlen]))
+			if r.response.isValid(respBuf[:rlen]) {
+				sb.WriteString(r.response.decode(respBuf[:rlen]))
 			}
 		}
 	}
diff --git a/request.go b/request.go
index 331e148..fea54ec 100644
--- a/request.go
+++ b/request.go
@@ -23,7 +23,7 @@ func newRequest(password string) request {
 	}
 }
 
-func (r request) Encode(cmd string) ([]byte, error) {
+func (r request) encode(cmd string) ([]byte, error) {
 	if cmd == "" {
 		return nil, errors.New("command cannot be empty")
 	}
diff --git a/response.go b/response.go
index 1c4f452..7087049 100644
--- a/response.go
+++ b/response.go
@@ -12,10 +12,10 @@ func newResponse() response {
 	return response{}
 }
 
-func (r response) IsValid(buf []byte) bool {
+func (r response) isValid(buf []byte) bool {
 	return len(buf) > len(responseHeader) && bytes.HasPrefix(buf, []byte(responseHeader))
 }
 
-func (r response) Decode(buf []byte) string {
+func (r response) decode(buf []byte) string {
 	return string(buf[len(responseHeader):])
 }