diff --git a/.depend b/.depend
index c32b60c..e69de29 100644
--- a/.depend
+++ b/.depend
@@ -1,543 +0,0 @@
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-/usr/include/signal/session_record.h:
-/usr/include/signal/session_pre_key.h:
-/usr/include/signal/sender_key_record.h:
-signal.hh:
-/usr/include/signal/key_helper.h:
-/usr/include/signal/session_builder.h:
-/usr/include/signal/session_cipher.h:
-/usr/include/signal/session_pre_key.h:
-/usr/include/signal/protocol.h:
-/usr/include/signal/curve.h:
-gcrypt.hh:
-util.hh:
-.pgp.o: pgp.cpp plugin.hh pgp.hh
-plugin.hh:
-pgp.hh:
-.user.o: user.cpp plugin.hh account.hh omemo.hh \
- /usr/include/signal/signal_protocol.h /usr/include/signal/ratchet.h \
- /usr/include/signal/signal_protocol_types.h /usr/include/signal/curve.h \
- /usr/include/signal/session_record.h \
- /usr/include/signal/session_pre_key.h \
- /usr/include/signal/sender_key_record.h signal.hh \
- deps/fmt/include/fmt/core.h /usr/include/signal/key_helper.h \
- /usr/include/signal/session_builder.h \
- /usr/include/signal/session_cipher.h \
- /usr/include/signal/session_pre_key.h /usr/include/signal/protocol.h \
- /usr/include/signal/curve.h user.hh channel.hh
-plugin.hh:
-account.hh:
-omemo.hh:
-/usr/include/signal/signal_protocol.h:
-/usr/include/signal/ratchet.h:
-/usr/include/signal/signal_protocol_types.h:
-/usr/include/signal/curve.h:
-/usr/include/signal/session_record.h:
-/usr/include/signal/session_pre_key.h:
-/usr/include/signal/sender_key_record.h:
-signal.hh:
-deps/fmt/include/fmt/core.h:
-/usr/include/signal/key_helper.h:
-/usr/include/signal/session_builder.h:
-/usr/include/signal/session_cipher.h:
-/usr/include/signal/session_pre_key.h:
-/usr/include/signal/protocol.h:
-/usr/include/signal/curve.h:
-user.hh:
-channel.hh:
-.util.o: util.cpp plugin.hh util.hh
-plugin.hh:
-util.hh:
-xmpp/.presence.o: xmpp/presence.cpp xmpp/stanza.hh
-xmpp/stanza.hh:
-xmpp/.iq.o: xmpp/iq.cpp xmpp/stanza.hh
-xmpp/stanza.hh:
-xmpp/.node.o: xmpp/node.cpp xmpp/node.hh deps/fmt/include/fmt/core.h \
- xmpp/xep-0027.inl xmpp/ns.hh xmpp/xep-0030.inl xmpp/xep-0045.inl \
- xmpp/xep-0049.inl xmpp/xep-0115.inl xmpp/xep-0280.inl xmpp/xep-0319.inl \
- xmpp/rfc-6121.inl
-xmpp/node.hh:
-deps/fmt/include/fmt/core.h:
-xmpp/xep-0027.inl:
-xmpp/ns.hh:
-xmpp/xep-0030.inl:
-xmpp/xep-0045.inl:
-xmpp/xep-0049.inl:
-xmpp/xep-0115.inl:
-xmpp/xep-0280.inl:
-xmpp/xep-0319.inl:
-xmpp/rfc-6121.inl:
diff --git a/.gitignore b/.gitignore
index e46f175..e635207 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,6 +3,7 @@
 compile_commands.json
 .cache
 cscope*
+.depend
 *.d
 *.gcno
 *.gcda
diff --git a/.gitmodules b/.gitmodules
index 537eb1e..044f278 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -4,3 +4,6 @@
 [submodule "diff"]
 	path = deps/diff
 	url = https://github.com/kristapsdz/libdiff
+[submodule "deps/optional"]
+	path = deps/optional
+	url = https://github.com/TartanLlama/optional
diff --git a/channel.cpp b/channel.cpp
index 7e840ee..70c2afa 100644
--- a/channel.cpp
+++ b/channel.cpp
@@ -9,6 +9,7 @@
 #include <time.h>
 #include <regex>
 #include <fmt/core.h>
+#include <tl/optional.hpp>
 #include <strophe.h>
 #include <weechat/weechat-plugin.h>
 
@@ -1056,7 +1057,7 @@ struct t_channel_member *channel__remove_member(struct t_account *account,
 
 int channel__send_message(struct t_account *account, struct t_channel *channel,
                           std::string to, std::string body,
-                          std::optional<std::string> oob = {})
+                          tl::optional<std::string> oob = {})
 {
     xmpp_stanza_t *message = xmpp_message_new(account->context,
                     channel->type == CHANNEL_TYPE_MUC
diff --git a/deps/optional b/deps/optional
new file mode 160000
index 0000000..c28fcf7
--- /dev/null
+++ b/deps/optional
@@ -0,0 +1 @@
+Subproject commit c28fcf74d207fc667c4ed3dbae4c251ea551c8c1
diff --git a/makefile b/makefile
index d91faf1..af958d7 100644
--- a/makefile
+++ b/makefile
@@ -5,10 +5,10 @@ endif
 
 RM ?= rm -f
 FIND ?= find
-CC = $(if $(shell which gcc-12.0.1),gcc-12.0.1,cc)
-CXX = $(if $(shell which g++-12.0.1),g++-12.0.1,c++)
+CC = gcc
+CXX = g++
 
-INCLUDES=-Ilibstrophe -Ideps -Ideps/fmt/include \
+INCLUDES=-Ilibstrophe -Ideps -Ideps/optional/include -Ideps/fmt/include \
 	 $(shell xml2-config --cflags) \
 	 $(shell pkg-config --cflags gpgme) \
 	 $(shell pkg-config --cflags libsignal-protocol-c)
@@ -25,7 +25,7 @@ CFLAGS+=$(DBGCFLAGS) \
 CPPFLAGS+=$(DBGCFLAGS) -O0 \
 	  -fno-omit-frame-pointer -fPIC \
 	  -fvisibility=hidden -fvisibility-inlines-hidden \
-	  -std=c++23 -gdwarf-4 -fkeep-inline-functions  \
+	  -std=c++20 -gdwarf-4 -fkeep-inline-functions  \
 	  -Wall -Wextra -pedantic \
 	  -Wno-missing-field-initializers \
 	  $(INCLUDES)
diff --git a/omemo.cpp b/omemo.cpp
index 5867375..6a3d5e7 100644
--- a/omemo.cpp
+++ b/omemo.cpp
@@ -16,6 +16,7 @@
 #include <time.h>
 #include <math.h>
 #include <limits.h>
+#include <tl/optional.hpp>
 #include <strophe.h>
 #include <weechat/weechat-plugin.h>
 
@@ -1691,7 +1692,7 @@ int bks_store_bundle(struct signal_protocol_address *address,
     return 0;
 }
 
-std::optional<libsignal::pre_key_bundle> bks_load_bundle(struct signal_protocol_address *address, t_omemo *omemo)
+tl::optional<libsignal::pre_key_bundle> bks_load_bundle(struct signal_protocol_address *address, t_omemo *omemo)
 {
     std::string k_bundle_pk = fmt::format("bundle_pk_{}_{}", address->name, address->device_id);
     std::string k_bundle_sk = fmt::format("bundle_sk_{}_{}", address->name, address->device_id);
diff --git a/user.hh b/user.hh
index c0b2d65..d477257 100644
--- a/user.hh
+++ b/user.hh
@@ -6,13 +6,14 @@
 
 #include <optional>
 #include <string>
+#include <tl/optional.hpp>
 
 struct t_user_profile
 {
     char *avatar_hash;
     char *status_text;
     char *status;
-    std::optional<std::string> idle;
+    tl::optional<std::string> idle;
     char *display_name;
     char *email;
     char *role;
diff --git a/xmpp/node.cpp b/xmpp/node.cpp
index 64a4ca9..df4d7d4 100644
--- a/xmpp/node.cpp
+++ b/xmpp/node.cpp
@@ -26,7 +26,7 @@ std::string get_name(xmpp_stanza_t *stanza) {
         return {};
 }
 
-std::optional<std::string> get_attribute(xmpp_stanza_t *stanza, const char *name) {
+tl::optional<std::string> get_attribute(xmpp_stanza_t *stanza, const char *name) {
     const char *result = NULL;
     result = xmpp_stanza_get_attribute(stanza, name);
     if (result)
@@ -124,14 +124,14 @@ void xml::message::bind(xmpp_ctx_t *context, xmpp_stanza_t *stanza) {
     node::bind(context, stanza);
 }
 
-std::optional<std::string> xml::presence::show() {
+tl::optional<std::string> xml::presence::show() {
     auto child = get_children("show");
     if (child.size() > 0)
         return child.front().get().text;
     return {};
 }
 
-std::optional<std::string> xml::presence::status() {
+tl::optional<std::string> xml::presence::status() {
     auto child = get_children("status");
     if (child.size() > 0)
         return child.front().get().text;
diff --git a/xmpp/node.hh b/xmpp/node.hh
index 4f5990f..5247a0a 100644
--- a/xmpp/node.hh
+++ b/xmpp/node.hh
@@ -16,10 +16,11 @@
 #include <variant>
 #include <fmt/core.h>
 #include <strophe.h>
+#include <tl/optional.hpp>
 
 std::string get_name(xmpp_stanza_t *stanza);
 
-std::optional<std::string> get_attribute(xmpp_stanza_t *stanza, const char *name);
+tl::optional<std::string> get_attribute(xmpp_stanza_t *stanza, const char *name);
 
 std::string get_text(xmpp_stanza_t *stanza);
 
@@ -59,10 +60,10 @@ namespace xml {
 
         xmpp_ctx_t *context;
 
-        std::optional<std::string> name;
+        tl::optional<std::string> name;
 
-        std::optional<std::string> id;
-        std::optional<std::string> ns;
+        tl::optional<std::string> id;
+        tl::optional<std::string> ns;
 
         std::map<std::string, std::string> attributes;
         std::vector<node> children;
@@ -71,7 +72,7 @@ namespace xml {
 
         virtual void bind(xmpp_ctx_t *context, xmpp_stanza_t *stanza);
 
-        inline std::optional<std::string>
+        inline tl::optional<std::string>
         get_attr(const std::string& name) {
             auto attribute = attributes.find(name);
             if (attribute != attributes.end())
@@ -227,10 +228,10 @@ namespace xml {
             bind(context, stanza);
         }
 
-        std::optional<jid> from;
-        std::optional<jid> to;
+        tl::optional<jid> from;
+        tl::optional<jid> to;
 
-        std::optional<std::string> type;
+        tl::optional<std::string> type;
 
         void bind(xmpp_ctx_t *context, xmpp_stanza_t *stanza) override;
     };
@@ -242,13 +243,13 @@ namespace xml {
             bind(context, stanza);
         }
 
-        std::optional<jid> from;
-        std::optional<jid> to;
+        tl::optional<jid> from;
+        tl::optional<jid> to;
 
-        std::optional<std::string> type;
+        tl::optional<std::string> type;
 
-        std::optional<std::string> show();
-        std::optional<std::string> status();
+        tl::optional<std::string> show();
+        tl::optional<std::string> status();
 
         void bind(xmpp_ctx_t *context, xmpp_stanza_t *stanza) override;
     };
@@ -259,10 +260,10 @@ namespace xml {
             bind(context, stanza);
         }
 
-        std::optional<jid> from;
-        std::optional<jid> to;
+        tl::optional<jid> from;
+        tl::optional<jid> to;
 
-        std::optional<std::string> type;
+        tl::optional<std::string> type;
 
         void bind(xmpp_ctx_t *context, xmpp_stanza_t *stanza) override;
     };
@@ -273,8 +274,8 @@ namespace xml {
             bind(context, stanza);
         }
 
-        std::optional<jid> from;
-        std::optional<jid> to;
+        tl::optional<jid> from;
+        tl::optional<jid> to;
 
         void bind(xmpp_ctx_t *context, xmpp_stanza_t *stanza) override;
     };
diff --git a/xmpp/xep-0027.inl b/xmpp/xep-0027.inl
index 5763d82..4cd91cc 100644
--- a/xmpp/xep-0027.inl
+++ b/xmpp/xep-0027.inl
@@ -17,29 +17,29 @@ namespace xml {
     /* Current Jabber OpenPGP Usage */
     class xep0027 : virtual public node {
     private:
-        std::optional<std::optional<std::string>> _signature;
-        std::optional<std::optional<std::string>> _encrypted;
+        tl::optional<tl::optional<std::string>> _signature;
+        tl::optional<tl::optional<std::string>> _encrypted;
     public:
-        std::optional<std::string>& signature() {
+        tl::optional<std::string>& signature() {
             if (!_signature)
             {
                 auto child = get_children<jabber::x::signed_>("x");
                 if (child.size() > 0)
                     _signature = child.front().get().text;
                 else
-                    _signature.emplace(std::nullopt);
+                    _signature.emplace(tl::nullopt);
             }
             return *_signature;
         }
 
-        std::optional<std::string>& encrypted() {
+        tl::optional<std::string>& encrypted() {
             if (!_encrypted)
             {
                 auto child = get_children<jabber::x::encrypted>("x");
                 if (child.size() > 0)
                     _encrypted = child.front().get().text;
                 else
-                    _encrypted.emplace(std::nullopt);
+                    _encrypted.emplace(tl::nullopt);
             }
             return *_encrypted;
         }
diff --git a/xmpp/xep-0045.inl b/xmpp/xep-0045.inl
index 2aa2da1..44edb7f 100644
--- a/xmpp/xep-0045.inl
+++ b/xmpp/xep-0045.inl
@@ -108,8 +108,8 @@ namespace xml {
                 };
 
                 std::string reason;
-                std::optional<jid> from;
-                std::optional<jid> to;
+                tl::optional<jid> from;
+                tl::optional<jid> to;
             };
 
             struct destroy {
@@ -121,7 +121,7 @@ namespace xml {
                 };
 
                 std::string reason;
-                std::optional<jid> target;
+                tl::optional<jid> target;
             };
 
             struct invite {
@@ -135,8 +135,8 @@ namespace xml {
                 };
 
                 std::string reason;
-                std::optional<jid> from;
-                std::optional<jid> to;
+                tl::optional<jid> from;
+                tl::optional<jid> to;
             };
 
             class item {
@@ -152,7 +152,7 @@ namespace xml {
                     }
 
                     std::string reason;
-                    std::optional<jid> target;
+                    tl::optional<jid> target;
                     std::string nick;
                 };
 
@@ -186,10 +186,10 @@ namespace xml {
                 std::vector<actor> actors;
                 std::vector<continue_> continues;
                 std::string reason;
-                std::optional<enum affiliation> affiliation;
-                std::optional<jid> target;
-                std::optional<std::string> nick;
-                std::optional<enum role> role;
+                tl::optional<enum affiliation> affiliation;
+                tl::optional<jid> target;
+                tl::optional<std::string> nick;
+                tl::optional<enum role> role;
             };
 
         public:
@@ -300,10 +300,10 @@ namespace xml {
                     description = child.get().text;
             }
 
-            std::optional<jid> by;
-            std::optional<enum action> type;
-            std::optional<enum condition> condition;
-            std::optional<std::string> description;
+            tl::optional<jid> by;
+            tl::optional<enum action> type;
+            tl::optional<enum condition> condition;
+            tl::optional<std::string> description;
 
             const char* reason() {
                 if (condition)
@@ -331,9 +331,9 @@ namespace xml {
         };
 
     private:
-        std::optional<bool> _muc;
-        std::optional<std::optional<x>> _muc_user;
-        std::optional<std::optional<error>> _error;
+        tl::optional<bool> _muc;
+        tl::optional<tl::optional<x>> _muc_user;
+        tl::optional<tl::optional<error>> _error;
     public:
         bool muc() {
             if (!_muc)
@@ -344,26 +344,26 @@ namespace xml {
             return *_muc;
         }
 
-        std::optional<x>& muc_user() {
+        tl::optional<x>& muc_user() {
             if (!_muc_user)
             {
                 auto child = get_children<jabber_org::protocol::muc::user>("x");
                 if (child.size() > 0)
                     _muc_user = child.front().get();
                 else
-                    _muc_user.emplace(std::nullopt);
+                    _muc_user.emplace(tl::nullopt);
             }
             return *_muc_user;
         }
 
-        std::optional<error>& error() {
+        tl::optional<error>& error() {
             if (!_error)
             {
                 auto child = get_children("error");
                 if (child.size() > 0)
                     _error = child.front().get();
                 else
-                    _error.emplace(std::nullopt);
+                    _error.emplace(tl::nullopt);
             }
             return *_error;
         }
diff --git a/xmpp/xep-0115.inl b/xmpp/xep-0115.inl
index 17cdc3f..09c8f5d 100644
--- a/xmpp/xep-0115.inl
+++ b/xmpp/xep-0115.inl
@@ -29,23 +29,23 @@ namespace xml{
                     verification = *attr;
             };
 
-            std::optional<std::string> ext;
+            tl::optional<std::string> ext;
             std::string hashalgo;
             std::string node;
             std::string verification;
         };
 
     private:
-        std::optional<std::optional<caps>> _capabilities;
+        tl::optional<tl::optional<caps>> _capabilities;
     public:
-        std::optional<caps> capabilities() {
+        tl::optional<caps> capabilities() {
             if (!_capabilities)
             {
                 auto child = get_children<jabber_org::protocol::caps>("c");
                 if (child.size() > 0)
                     _capabilities = caps(child.front().get());
                 else
-                    _capabilities.emplace(std::nullopt);
+                    _capabilities.emplace(tl::nullopt);
             }
             return *_capabilities;
         }
diff --git a/xmpp/xep-0319.inl b/xmpp/xep-0319.inl
index f466666..bc91fc3 100644
--- a/xmpp/xep-0319.inl
+++ b/xmpp/xep-0319.inl
@@ -19,24 +19,24 @@ namespace xml {
     /* Last User Interaction in Presence */
     class xep0319 : virtual public node {
     private:
-        std::optional<std::optional<std::chrono::system_clock::time_point>> _idle_since;
+        tl::optional<tl::optional<std::chrono::system_clock::time_point>> _idle_since;
     public:
-        std::optional<std::chrono::system_clock::time_point> idle_since() {
+        tl::optional<std::chrono::system_clock::time_point> idle_since() {
             if (!_idle_since)
             {
                 auto children = get_children<urn::xmpp::idle::_1>("idle");
                 if (children.size() <= 0)
-                    _idle_since.emplace(std::nullopt);
+                    _idle_since.emplace(tl::nullopt);
                 else {
                     auto since = children.front().get().get_attr("since");
                     if (!since)
-                        _idle_since.emplace(std::nullopt);
+                        _idle_since.emplace(tl::nullopt);
                     else {
                         try {
                             _idle_since = get_time(*since);
                         }
                         catch (const std::invalid_argument& ex) {
-                            _idle_since.emplace(std::nullopt);
+                            _idle_since.emplace(tl::nullopt);
                         }
                     }
                 }