diff --git a/routes/artworks.cpp b/routes/artworks.cpp
index 2b1bda8..35de753 100644
--- a/routes/artworks.cpp
+++ b/routes/artworks.cpp
@@ -13,7 +13,7 @@ static inline Nodes parse_description_line(const httplib::Request& req, const Co
 static inline Element generate_description(const httplib::Request& req, const Config& config, const std::string& description);
 static inline Element generate_illust_tags(const httplib::Request& req, const Config& config, const Illust& illust);
 static inline std::string generate_description_text(const httplib::Request& req, const Config& config, std::string description);
-static inline Nodes generate_ogp_nodes(const httplib::Request& req, const Config& config, const Illust& illust);
+static inline Nodes generate_ogp_nodes(const httplib::Request& req, const Config& config, const Illust& illust, bool preview);
 
 static inline bool is_true(const std::string& str);
 static inline std::string time_to_string(time_t time);
@@ -53,7 +53,7 @@ void artworks_route(const httplib::Request& req, httplib::Response& res, const C
     }
     body.nodes.push_back(generate_illust_tags(req, config, illust));
     body.nodes.push_back(Element("p", {time_to_string(illust.upload_time)}));
-    serve(req, res, config, illust.title, std::move(body), generate_ogp_nodes(req, config, illust));
+    serve(req, res, config, illust.title, std::move(body), generate_ogp_nodes(req, config, illust, preview));
 }
 
 static inline Element generate_user_link(const httplib::Request& req, const Config& config, const Illust& illust) {
@@ -227,12 +227,16 @@ static inline std::string generate_description_text(const httplib::Request& req,
     return new_description;
 }
 
-static inline Nodes generate_ogp_nodes(const httplib::Request& req, const Config& config, const Illust& illust) {
+static inline Nodes generate_ogp_nodes(const httplib::Request& req, const Config& config, const Illust& illust, bool preview) {
+    std::string url = get_origin(req, config) + "/artworks/" + std::to_string(illust.illust_id);
+    if (preview) {
+        url += "?preview=1";
+    }
     Nodes nodes({
         Element("meta", {{"property", "og:title"}, {"content", illust.title}}, {}),
         Element("meta", {{"property", "og:type"}, {"content", "photo"}}, {}),
         Element("meta", {{"property", "og:site_name"}, {"content", "Pixwhile"}}, {}),
-        Element("meta", {{"property", "og:url"}, {"content", get_origin(req, config) + "/artworks/" + std::to_string(illust.illust_id)}}, {})
+        Element("meta", {{"property", "og:url"}, {"content", std::move(url)}}, {})
     });
     if (illust.comment) {
         nodes.push_back(Element("meta", {{"property", "og:description"}, {"content", generate_description_text(req, config, *illust.comment)}}, {}));
diff --git a/routes/users/illustrations.cpp b/routes/users/illustrations.cpp
index e7f9351..d731949 100644
--- a/routes/users/illustrations.cpp
+++ b/routes/users/illustrations.cpp
@@ -6,7 +6,7 @@
 #include "../../pixivclient.h"
 #include "common.h"
 
-static inline Nodes generate_ogp_nodes(const httplib::Request& req, const Config& config, const User& user);
+static inline Nodes generate_ogp_nodes(const httplib::Request& req, const Config& config, const User& user, uint64_t page);
 
 void user_illustrations_route(const httplib::Request& req, httplib::Response& res, const Config& config, PixivClient& pixiv_client) {
     uint64_t user_id = to_ull(req.matches[1].str());
@@ -36,15 +36,21 @@ void user_illustrations_route(const httplib::Request& req, httplib::Response& re
         generate_user_header(std::move(user), config),
         generate_illusts_pager(req, config, illusts, page, "illusts")
     });
-    serve(req, res, config, user.display_name + "'s illustrations", std::move(body), generate_ogp_nodes(req, config, user));
+    serve(req, res, config, user.display_name + "'s illustrations", std::move(body), generate_ogp_nodes(req, config, user, page));
 }
 
-static inline Nodes generate_ogp_nodes(const httplib::Request& req, const Config& config, const User& user) {
+static inline Nodes generate_ogp_nodes(const httplib::Request& req, const Config& config, const User& user, uint64_t page) {
+    using namespace std::string_literals;
+
+    std::string url = get_origin(req, config) + "/users/" + std::to_string(user.user_id) + "/illustrations";
+    if (page != 0) {
+        url += "?p="s + std::to_string(page + 1);
+    }
     Nodes nodes({
         Element("meta", {{"property", "og:title"}, {"content", user.display_name + " (@" + user.username + ')'}}, {}),
         Element("meta", {{"property", "og:type"}, {"content", user.ogp_image ? "photo" : "website"}}, {}),
         Element("meta", {{"property", "og:site_name"}, {"content", "Pixwhile"}}, {}),
-        Element("meta", {{"property", "og:url"}, {"content", get_origin(req, config) + "/users/" + std::to_string(user.user_id) + "/illustrations"}}, {})
+        Element("meta", {{"property", "og:url"}, {"content", std::move(url)}}, {})
     });
     if (user.ogp_image) {
         nodes.push_back(Element("meta", {{"property", "og:image"}, {"content", proxy_image_url(config, *user.ogp_image)}}, {}));
diff --git a/thirdparty/FastHash.h b/thirdparty/FastHash.h
index 8b97771..c3b9aea 100644
--- a/thirdparty/FastHash.h
+++ b/thirdparty/FastHash.h
@@ -37,6 +37,8 @@
 // Source: fast-hash https://github.com/ztanml/fast-hash (26 Nov 2021)
 // Changes: General uplift and providing a general constant hash for ranges
 
+#include <cstdint>
+
 #pragma once
 
 // Compression function for Merkle-Damgard construction.