diff --git a/Cargo.lock b/Cargo.lock
index 9ba8f60..ea1665c 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2581,7 +2581,7 @@ dependencies = [
 
 [[package]]
 name = "rustpad"
-version = "0.2.38"
+version = "0.2.39"
 dependencies = [
  "argon2",
  "aws-config",
diff --git a/Cargo.toml b/Cargo.toml
index 14a127b..53f89a2 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "rustpad"
-version = "0.2.38"
+version = "0.2.39"
 edition = "2024"
 rust-version = "1.94"
 description = "Collaborative Markdown notepad built with Axum, WebSockets and SQLite, PostgreSQL and MySQL"
diff --git a/migrations/mysql/0030_document_utf8mb4.sql b/migrations/mysql/0030_document_utf8mb4.sql
new file mode 100644
index 0000000..7608cdc
--- /dev/null
+++ b/migrations/mysql/0030_document_utf8mb4.sql
@@ -0,0 +1,8 @@
+-- Existing MySQL databases may have inherited utf8mb3 from the database default.
+-- Convert all persisted document text to utf8mb4 so emoji and other 4-byte
+-- Unicode characters can be stored in both current documents and revisions.
+ALTER TABLE pads CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
+ALTER TABLE revisions CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
+ALTER TABLE workspaces CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
+ALTER TABLE notes CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
+ALTER TABLE note_revisions CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
diff --git a/migrations/postgres/0030_document_utf8mb4.sql b/migrations/postgres/0030_document_utf8mb4.sql
new file mode 100644
index 0000000..8555157
--- /dev/null
+++ b/migrations/postgres/0030_document_utf8mb4.sql
@@ -0,0 +1,2 @@
+-- PostgreSQL text values are already stored as UTF-8.
+SELECT 1;
diff --git a/migrations/sqlite/0030_document_utf8mb4.sql b/migrations/sqlite/0030_document_utf8mb4.sql
new file mode 100644
index 0000000..6407c77
--- /dev/null
+++ b/migrations/sqlite/0030_document_utf8mb4.sql
@@ -0,0 +1,2 @@
+-- SQLite TEXT values already support full Unicode.
+SELECT 1;
diff --git a/src/database.rs b/src/database.rs
index eb2f663..e165bf5 100644
--- a/src/database.rs
+++ b/src/database.rs
@@ -29,10 +29,18 @@ impl Database {
         sqlx::any::install_default_drivers();
         let kind = DatabaseKind::from_url(url)?;
         debug!(?kind, max_connections, "initializing database pool");
-        let pool = AnyPoolOptions::new()
-            .max_connections(max_connections)
-            .connect(url)
-            .await?;
+        let mut options = AnyPoolOptions::new().max_connections(max_connections);
+        if kind == DatabaseKind::MySql {
+            options = options.after_connect(|connection, _metadata| {
+                Box::pin(async move {
+                    sqlx::query("SET NAMES utf8mb4 COLLATE utf8mb4_unicode_ci")
+                        .execute(connection)
+                        .await?;
+                    Ok(())
+                })
+            });
+        }
+        let pool = options.connect(url).await?;
         if kind == DatabaseKind::Sqlite {
             debug!("applying SQLite connection pragmas");
             sqlx::query(queries::get(kind, queries::SQLITE_FOREIGN_KEYS_ON))
diff --git a/static/css/styles.css b/static/css/styles.css
index e823d68..155f0f3 100644
--- a/static/css/styles.css
+++ b/static/css/styles.css
@@ -3746,7 +3746,7 @@ dialog::backdrop {
 .markdown-details>summary {
   padding: .55em .8em;
   color: var(--text);
-  font-weight: 650;
+  font-weight: 400;
   cursor: pointer;
   user-select: none;
 }