diff --git a/src/OpaqueVal.cc b/src/OpaqueVal.cc
index 4c36084091..b4dcc25a32 100644
--- a/src/OpaqueVal.cc
+++ b/src/OpaqueVal.cc
@@ -70,12 +70,6 @@ OpaqueValPtr OpaqueMgr::Instantiate(const std::string& id) const {
     return x != _types.end() ? (*x->second)() : nullptr;
 }
 
-broker::expected<broker::data> OpaqueVal::Serialize() const {
-    if ( auto res = SerializeData() )
-        return zeek::detail::BrokerDataAccess::Unbox(*res);
-    return {broker::make_error(broker::ec::serialization_failed)};
-}
-
 std::optional<BrokerData> OpaqueVal::SerializeData() const {
     auto type = OpaqueMgr::mgr()->TypeID(this);
 
@@ -89,8 +83,6 @@ std::optional<BrokerData> OpaqueVal::SerializeData() const {
     return std::move(builder).Build();
 }
 
-OpaqueValPtr OpaqueVal::Unserialize(const broker::data& data) { return UnserializeData(BrokerDataView(&data)); }
-
 OpaqueValPtr OpaqueVal::UnserializeData(BrokerDataView data) {
     if ( ! data.IsList() )
         return nullptr;
@@ -114,22 +106,9 @@ OpaqueValPtr OpaqueVal::UnserializeData(BrokerListView v) {
     return val;
 }
 
-broker::expected<broker::data> OpaqueVal::DoSerialize() const {
-    return {broker::make_error(broker::ec::serialization_failed)};
-}
+std::optional<BrokerData> OpaqueVal::DoSerializeData() const { return std::nullopt; }
 
-std::optional<BrokerData> OpaqueVal::DoSerializeData() const {
-    if ( auto res = DoSerialize() ) {
-        return BrokerData{std::move(*res)};
-    }
-    return std::nullopt;
-}
-
-bool OpaqueVal::DoUnserialize(const broker::data&) { return false; }
-
-bool OpaqueVal::DoUnserializeData(BrokerDataView data) {
-    return DoUnserialize(zeek::detail::BrokerDataAccess::Unbox(data));
-}
+bool OpaqueVal::DoUnserializeData(BrokerDataView data) { return false; }
 
 std::optional<BrokerData> OpaqueVal::SerializeType(const TypePtr& t) {
     if ( t->InternalType() == TYPE_INTERNAL_ERROR )
diff --git a/src/OpaqueVal.h b/src/OpaqueVal.h
index 8b6c88b69a..ba0a048979 100644
--- a/src/OpaqueVal.h
+++ b/src/OpaqueVal.h
@@ -119,28 +119,11 @@ public:
     explicit OpaqueVal(OpaqueTypePtr t);
     ~OpaqueVal() override = default;
 
-    /**
-     * Serializes the value into a Broker representation.
-     *
-     * @return the broker representation, or an error if serialization
-     * isn't supported or failed.
-     */
-    [[deprecated("Remove in v7.1: use SerializeData instead")]] broker::expected<broker::data> Serialize() const;
-
     /**
      * @copydoc Serialize
      */
     std::optional<BrokerData> SerializeData() const;
 
-    /**
-     * Reinstantiates a value from its serialized Broker representation.
-     *
-     * @param data Broker representation as returned by *Serialize()*.
-     * @return unserialized instances with reference count at +1
-     */
-    [[deprecated("Remove in v7.1: use UnserializeData instead")]] static OpaqueValPtr Unserialize(
-        const broker::data& data);
-
     /**
      * @copydoc Unserialize
      */
@@ -155,11 +138,6 @@ protected:
     friend class Val;
     friend class OpaqueMgr;
 
-    /**
-     * @deprecated Override DoSerializeData instead. Remove in v7.1.
-     */
-    virtual broker::expected<broker::data> DoSerialize() const;
-
     /**
      * Must be overridden to provide a serialized version of the derived
      * class' state.
@@ -169,11 +147,6 @@ protected:
      */
     virtual std::optional<BrokerData> DoSerializeData() const;
 
-    /**
-     * @deprecated Override DoUnserializeData instead. Remove in v7.1.
-     */
-    virtual bool DoUnserialize(const broker::data& data);
-
     /**
      * Must be overridden to recreate the derived class' state from a
      * serialization.