diff --git a/backend/Dockerfile b/backend/Dockerfile
index 1b407d8..1aeced2 100644
--- a/backend/Dockerfile
+++ b/backend/Dockerfile
@@ -11,6 +11,7 @@ RUN apt-get update \
         libpq-dev \
         libjpeg-dev \
         libpng-dev \
+        curl \
     && rm -rf /var/lib/apt/lists/*
 
 COPY Cargo.toml Cargo.lock ./
@@ -28,11 +29,25 @@ WORKDIR /app
 RUN apt-get update \
     && apt-get install -y --no-install-recommends \
         ca-certificates \
+        curl \
         libssl3 \
         libpq5 \
         libjpeg62-turbo \
         libpng16-16 \
+        ocrmypdf \
+        tesseract-ocr \
+        ghostscript \
+        qpdf \
     && rm -rf /var/lib/apt/lists/* \
+    && mkdir -p /usr/local/lib \
+    && curl -fsSL https://github.com/bblanchon/pdfium-binaries/releases/latest/download/pdfium-linux-arm64.tgz -o /tmp/pdfium.tgz \
+    && mkdir -p /tmp/pdfium \
+    && tar -xzf /tmp/pdfium.tgz -C /tmp/pdfium --strip-components=1 \
+    && pdfium_so="$(find /tmp/pdfium -name libpdfium.so -type f | head -n1)" \
+    && [ -n "${pdfium_so}" ] \
+    && mv "${pdfium_so}" /usr/local/lib/libpdfium.so \
+    && ldconfig \
+    && rm -rf /tmp/pdfium.tgz /tmp/pdfium \
     && useradd --system --create-home --uid 10001 appuser
 
 COPY --from=builder /app/target/release/backend /usr/local/bin/papercrate-backend
diff --git a/backend/src/routes/documents.rs b/backend/src/routes/documents.rs
index 0f47ced..306eaba 100644
--- a/backend/src/routes/documents.rs
+++ b/backend/src/routes/documents.rs
@@ -145,6 +145,11 @@ pub struct BulkMoveRequest {
     pub folder_id: Option<Uuid>,
 }
 
+#[derive(Deserialize)]
+pub struct UpdateDocumentRequest {
+    pub title: Option<String>,
+}
+
 #[derive(Serialize)]
 pub struct BulkMoveResponse {
     pub updated: usize,
@@ -627,6 +632,70 @@ pub async fn delete_document(
     Ok(StatusCode::NO_CONTENT)
 }
 
+pub async fn update_document(
+    State(state): State<AppState>,
+    Path(document_id): Path<Uuid>,
+    user: AuthenticatedUser,
+    Json(payload): Json<UpdateDocumentRequest>,
+) -> AppResult<Json<DocumentDetailResponse>> {
+    let mut conn = state.db()?;
+
+    let mut document: Document = documents::table.find(document_id).first(&mut conn)?;
+    if document.deleted_at.is_some() {
+        return Err(AppError::not_found());
+    }
+
+    let new_title = match payload.title {
+        Some(ref title) => {
+            let trimmed = title.trim();
+            if trimmed.is_empty() {
+                return Err(AppError::bad_request("title must not be empty"));
+            }
+            Some(trimmed.to_string())
+        }
+        None => None,
+    };
+
+    if new_title.is_none() {
+        return Err(AppError::bad_request("no changes provided"));
+    }
+
+    if let Some(title) = new_title {
+        let now = Utc::now().naive_utc();
+        diesel::update(documents::table.find(document_id))
+            .set((documents::title.eq(title), documents::updated_at.eq(now)))
+            .execute(&mut conn)?;
+        document = documents::table.find(document_id).first(&mut conn)?;
+    }
+
+    let current_version: DocumentVersion = document_versions::table
+        .filter(document_versions::document_id.eq(document_id))
+        .filter(document_versions::version_number.eq(document.current_version))
+        .first(&mut conn)?;
+
+    let tags_map = load_tags_for_documents(&mut conn, &[document_id])?;
+    let version_id = current_version.id;
+    drop(conn);
+
+    let assets = load_asset_responses(&state, version_id).await?;
+    let thumbnail = assets
+        .iter()
+        .find(|asset| asset.asset_type == "thumbnail")
+        .cloned();
+
+    Ok(Json(DocumentDetailResponse {
+        document: to_document_response(
+            &state,
+            user.user_id,
+            document,
+            tags_map.get(&document_id).cloned(),
+            thumbnail,
+        )?,
+        current_version: to_version_response(current_version),
+        assets,
+    }))
+}
+
 pub async fn move_document(
     State(state): State<AppState>,
     Path(document_id): Path<Uuid>,
diff --git a/backend/src/routes/mod.rs b/backend/src/routes/mod.rs
index 1a0ec60..95f0643 100644
--- a/backend/src/routes/mod.rs
+++ b/backend/src/routes/mod.rs
@@ -64,7 +64,9 @@ pub fn create_router(state: AppState) -> Router<()> {
         )
         .route(
             "/:id",
-            get(documents::get_document).delete(documents::delete_document),
+            get(documents::get_document)
+                .delete(documents::delete_document)
+                .patch(documents::update_document),
         )
         .route("/:id/download", get(documents::download_document))
         .route(
diff --git a/backend/tests/common/mod.rs b/backend/tests/common/mod.rs
index efd9a8b..e861821 100644
--- a/backend/tests/common/mod.rs
+++ b/backend/tests/common/mod.rs
@@ -8,12 +8,6 @@ use async_trait::async_trait;
 use axum::body::Body;
 use axum::http::{Method, Request, StatusCode};
 use axum::Router;
-use diesel::connection::SimpleConnection;
-use diesel::prelude::*;
-use diesel::PgConnection;
-use diesel_migrations::{embed_migrations, EmbeddedMigrations, MigrationHarness};
-use http_body_util::BodyExt;
-use once_cell::sync::Lazy;
 use backend::auth::jwt::JwtService;
 use backend::config::AppConfig;
 use backend::db::{self, PgPool};
@@ -21,6 +15,12 @@ use backend::models::{Job, NewUser};
 use backend::routes;
 use backend::state::AppState;
 use backend::storage::ObjectStorage;
+use diesel::connection::SimpleConnection;
+use diesel::prelude::*;
+use diesel::PgConnection;
+use diesel_migrations::{embed_migrations, EmbeddedMigrations, MigrationHarness};
+use http_body_util::BodyExt;
+use once_cell::sync::Lazy;
 use rand::rngs::OsRng;
 use serde::Serialize;
 use tokio::sync::Mutex;
@@ -238,9 +238,7 @@ impl TestApp {
     pub async fn jobs_by_type(&self, ty: &str) -> Result<Vec<Job>> {
         let ty = ty.to_string();
         self.with_conn(move |conn| {
-            use backend::schema::jobs::dsl::{
-                job_type as job_type_col, jobs as jobs_table,
-            };
+            use backend::schema::jobs::dsl::{job_type as job_type_col, jobs as jobs_table};
             let rows = jobs_table
                 .filter(job_type_col.eq(&ty))
                 .load::<Job>(conn)