diff --git a/serde-json/src/cc/otavia/json/JsonHelper.scala b/serde-json/src/cc/otavia/json/JsonHelper.scala
index b5dc19da5..7736d23de 100644
--- a/serde-json/src/cc/otavia/json/JsonHelper.scala
+++ b/serde-json/src/cc/otavia/json/JsonHelper.scala
@@ -377,10 +377,6 @@ private[json] object JsonHelper {
         out.writeByte('\"')
     }
 
-    final def serializeLocale(locale: Locale, out: Buffer): Unit = ???
-
-    final def serializeCurrency(currency: Currency, out: Buffer): Unit = ???
-
     final def deserializeUUID(in: Buffer): UUID = {
         assert(in.skipIfNextIs('\"'), s"except \" but get ${in.readByte.toChar}")
         val uuid = BufferUtils.readStringAsUUID(in)
@@ -388,12 +384,4 @@ private[json] object JsonHelper {
         uuid
     }
 
-    final def deserializeLocale(in: Buffer): Locale = ???
-
-    final def deserializeCurrency(in: Buffer): Currency = ???
-
-    final def serializeMoney(money: Money, out: Buffer): Unit = ???
-
-    final def deserializeMoney(in: Buffer): Money = ???
-
 }
diff --git a/serde-json/src/cc/otavia/json/JsonSerde.scala b/serde-json/src/cc/otavia/json/JsonSerde.scala
index a7f30c6ee..ef75734c2 100644
--- a/serde-json/src/cc/otavia/json/JsonSerde.scala
+++ b/serde-json/src/cc/otavia/json/JsonSerde.scala
@@ -277,29 +277,8 @@ trait JsonSerde[A] extends Serde[A] with SerdeOps {
         this
     }
 
-    override final protected def serializeLocale(locale: Locale, out: Buffer): this.type = {
-        JsonHelper.serializeLocale(locale, out)
-        this
-    }
-
-    override final protected def serializeCurrency(currency: Currency, out: Buffer): this.type = {
-        JsonHelper.serializeCurrency(currency, out)
-        this
-    }
-
     override final protected def deserializeUUID(in: Buffer): UUID = JsonHelper.deserializeUUID(in)
 
-    override final protected def deserializeLocale(in: Buffer): Locale = JsonHelper.deserializeLocale(in)
-
-    override final protected def deserializeCurrency(in: Buffer): Currency = JsonHelper.deserializeCurrency(in)
-
-    override final protected def serializeMoney(money: Money, out: Buffer): this.type = {
-        JsonHelper.serializeMoney(money, out)
-        this
-    }
-
-    override final protected def deserializeMoney(in: Buffer): Money = JsonHelper.deserializeMoney(in)
-
 }
 
 object JsonSerde {
diff --git a/serde/src/cc/otavia/serde/SerdeOps.scala b/serde/src/cc/otavia/serde/SerdeOps.scala
index eadd25f79..ca0f7bb49 100644
--- a/serde/src/cc/otavia/serde/SerdeOps.scala
+++ b/serde/src/cc/otavia/serde/SerdeOps.scala
@@ -599,28 +599,6 @@ trait SerdeOps {
      */
     protected def serializeUUID(uuid: UUID, out: Buffer): this.type
 
-    /** Serialize [[Locale]] value to [[Buffer]].
-     *
-     *  @param locale
-     *    Value.
-     *  @param out
-     *    Output [[Buffer]].
-     *  @return
-     *    This [[Serde]] instance.
-     */
-    protected def serializeLocale(locale: Locale, out: Buffer): this.type
-
-    /** Serialize [[Currency]] value to [[Buffer]].
-     *
-     *  @param currency
-     *    Value.
-     *  @param out
-     *    Output [[Buffer]].
-     *  @return
-     *    This [[Serde]] instance.
-     */
-    protected def serializeCurrency(currency: Currency, out: Buffer): this.type
-
     /** Deserialize [[UUID]] value from [[Buffer]].
      *
      *  @param in
@@ -630,45 +608,4 @@ trait SerdeOps {
      */
     protected def deserializeUUID(in: Buffer): UUID
 
-    /** Deserialize [[Locale]] value from [[Buffer]].
-     *
-     *  @param in
-     *    Input [[Buffer]]
-     *  @return
-     *    [[Locale]] value.
-     */
-    protected def deserializeLocale(in: Buffer): Locale
-
-    /** Deserialize [[Currency]] value from [[Buffer]].
-     *
-     *  @param in
-     *    Input [[Buffer]]
-     *  @return
-     *    [[Currency]] value.
-     */
-    protected def deserializeCurrency(in: Buffer): Currency
-
-    //// otavia common data types
-    // serialize ops
-
-    /** Serialize [[Money]] value to [[Buffer]].
-     *
-     *  @param money
-     *    Value.
-     *  @param out
-     *    Output [[Buffer]].
-     *  @return
-     *    This [[Serde]] instance.
-     */
-    protected def serializeMoney(money: Money, out: Buffer): this.type
-
-    /** Deserialize [[Money]] value from [[Buffer]].
-     *
-     *  @param in
-     *    Input [[Buffer]]
-     *  @return
-     *    [[Money]] value.
-     */
-    protected def deserializeMoney(in: Buffer): Money
-
 }