diff --git a/include/discord_rpc.h b/include/discord_rpc.h
index 9470434..b057358 100644
--- a/include/discord_rpc.h
+++ b/include/discord_rpc.h
@@ -1,5 +1,6 @@
 #pragma once
 #include <stdint.h>
+#include <string.h>
 
 // clang-format off
 
@@ -23,6 +24,19 @@
 extern "C" {
 #endif
 
+// Activity Type
+#define DISCORD_ACTIVITY_TYPE_GAME 0
+#define DISCORD_ACTIVITY_TYPE_STREAMING 1
+#define DISCORD_ACTIVITY_TYPE_LISTENING 2
+#define DISCORD_ACTIVITY_TYPE_WATCHING 3
+#define DISCORD_ACTIVITY_TYPE_CUSTOM 4
+#define DISCORD_ACTIVITY_TYPE_COMPETING 5
+
+typedef struct DiscordButton {
+    const char* label;
+    const char* url;
+} DiscordButton;
+
 typedef struct DiscordRichPresence {
     const char* state;   /* max 128 bytes */
     const char* details; /* max 128 bytes */
@@ -40,6 +54,24 @@ typedef struct DiscordRichPresence {
     const char* joinSecret;     /* max 128 bytes */
     const char* spectateSecret; /* max 128 bytes */
     int8_t instance;
+    
+    // New Fields
+    const char* name;
+    int type;
+    const char* url;
+    int64_t createdAt;
+    const char* applicationId;
+    int statusDisplayType;
+    const char* detailsUrl;
+    const char* stateUrl;
+    const char* emojiName;
+    const char* emojiId;
+    int8_t emojiAnimated;
+    int flags;
+    const char* button1Label;
+    const char* button1Url;
+    const char* button2Label;
+    const char* button2Url;
 } DiscordRichPresence;
 
 typedef struct DiscordUser {
diff --git a/src/serialization.cpp b/src/serialization.cpp
index 70efa63..039f155 100644
--- a/src/serialization.cpp
+++ b/src/serialization.cpp
@@ -107,6 +107,25 @@ size_t JsonWriteRichPresenceObj(char* dest,
 
                 WriteOptionalString(writer, "state", presence->state);
                 WriteOptionalString(writer, "details", presence->details);
+                WriteOptionalString(writer, "url", presence->url);
+                WriteOptionalString(writer, "application_id", presence->applicationId);
+                WriteOptionalString(writer, "details_url", presence->detailsUrl);
+                WriteOptionalString(writer, "state_url", presence->stateUrl);
+
+                if (presence->type) {
+                     WriteKey(writer, "type");
+                     writer.Int(presence->type);
+                }
+
+                if (presence->createdAt) {
+                     WriteKey(writer, "created_at");
+                     writer.Int64(presence->createdAt);
+                }
+                
+                if (presence->statusDisplayType) {
+                     WriteKey(writer, "status_display_type");
+                     writer.Int(presence->statusDisplayType);
+                }
 
                 if (presence->startTimestamp || presence->endTimestamp) {
                     WriteObject timestamps(writer, "timestamps");
@@ -157,6 +176,43 @@ size_t JsonWriteRichPresenceObj(char* dest,
                     WriteOptionalString(writer, "join", presence->joinSecret);
                     WriteOptionalString(writer, "spectate", presence->spectateSecret);
                 }
+                
+                if ((presence->emojiName && presence->emojiName[0]) ||
+                    (presence->emojiId && presence->emojiId[0])) {
+                     WriteObject emoji(writer, "emoji");
+                     WriteOptionalString(writer, "name", presence->emojiName);
+                     WriteOptionalString(writer, "id", presence->emojiId);
+                     if (presence->emojiAnimated) {
+                         WriteKey(writer, "animated");
+                         writer.Bool(presence->emojiAnimated);
+                     }
+                }
+
+                if (presence->flags) {
+                    WriteKey(writer, "flags");
+                    writer.Int(presence->flags);
+                }
+
+                if (presence->button1Label && presence->button1Label[0] &&
+                    presence->button1Url && presence->button1Url[0]) {
+                    WriteKey(writer, "buttons");
+                    writer.StartArray();
+                    
+                    writer.StartObject();
+                    WriteOptionalString(writer, "label", presence->button1Label);
+                    WriteOptionalString(writer, "url", presence->button1Url);
+                    writer.EndObject();
+
+                    if (presence->button2Label && presence->button2Label[0] &&
+                        presence->button2Url && presence->button2Url[0]) {
+                        writer.StartObject();
+                        WriteOptionalString(writer, "label", presence->button2Label);
+                        WriteOptionalString(writer, "url", presence->button2Url);
+                        writer.EndObject();
+                    }
+                    
+                    writer.EndArray();
+                }
 
                 writer.Key("instance");
                 writer.Bool(presence->instance != 0);