diff --git a/apps/frontend/app/admin/releases/page.tsx b/apps/frontend/app/admin/releases/page.tsx
index 9e55914..1b974f8 100644
--- a/apps/frontend/app/admin/releases/page.tsx
+++ b/apps/frontend/app/admin/releases/page.tsx
@@ -18,6 +18,7 @@ import {
 
 const ANDROID_PLATFORM = 'ANDROID' as const;
 const APK_ACCEPT = '.apk,application/vnd.android.package-archive';
+const MAX_RELEASE_FILE_BYTES = 350 * 1024 * 1024;
 
 function formatBytes(value: string) {
   const size = Number(value);
@@ -83,6 +84,10 @@ export default function AdminReleasesPage() {
       showToast('Выберите файл релиза');
       return;
     }
+    if (file.size > MAX_RELEASE_FILE_BYTES) {
+      showToast('APK не должен превышать 350 МБ');
+      return;
+    }
     const parsedVersionCode = Number(versionCode);
     if (!version.trim() || !Number.isInteger(parsedVersionCode) || parsedVersionCode < 1) {
       showToast('Укажите версию и положительный код версии');
diff --git a/apps/frontend/lib/api.ts b/apps/frontend/lib/api.ts
index 6a8d8ca..a6dda47 100644
--- a/apps/frontend/lib/api.ts
+++ b/apps/frontend/lib/api.ts
@@ -1809,6 +1809,13 @@ export async function uploadAdminAppRelease(
 
   if (!response.ok) {
     const body = await response.json().catch(() => ({}));
+    if (response.status === 413) {
+      throw new ApiError(
+        'Файл слишком большой для загрузки (лимит сервера). Максимальный размер APK — 350 МБ. Попросите администратора обновить nginx: ./install.sh --fix-proxy',
+        413,
+        'UPLOAD_TOO_LARGE'
+      );
+    }
     const message = typeof body?.message === 'string' ? body.message : 'Не удалось загрузить релиз';
     throw new ApiError(message, response.status, 'UPLOAD_FAILED');
   }
diff --git a/install.sh b/install.sh
index 17506c0..cae1bce 100644
--- a/install.sh
+++ b/install.sh
@@ -2306,6 +2306,9 @@ generate_all_self_signed_certs() {
   ok "Самоподписанный сертификат создан: ${LOCAL_CERTS_DIR}/shared-intranet"
 }
 
+# Лимит тела запроса в nginx (APK до 350 МБ + запас на multipart).
+NGINX_RELEASE_UPLOAD_BODY_SIZE="${NGINX_RELEASE_UPLOAD_BODY_SIZE:-512m}"
+
 nginx_conf_target() {
   local label="$1"
   if [[ "$NGINX_MODE" == "docker" ]]; then
@@ -2571,6 +2574,10 @@ ${proxy_ws}
     }
 
     location ^~ /idp-api/ {
+        client_max_body_size ${NGINX_RELEASE_UPLOAD_BODY_SIZE};
+        proxy_read_timeout 900s;
+        proxy_send_timeout 900s;
+        client_body_timeout 900s;
 ${proxy_idp}
 ${nginx_proxy_headers_api}
     }
@@ -2611,7 +2618,7 @@ server {
     listen 80;
     listen [::]:80;
     server_name ${domain};
-    client_max_body_size 100m;
+    client_max_body_size ${NGINX_RELEASE_UPLOAD_BODY_SIZE};
 ${server_dns}
 ${ws_block}
 ${api_location}
@@ -2626,7 +2633,7 @@ ${http_preamble}server {
     listen [::]:443 ssl http2;
     server_name ${domain};
 ${ssl_block}
-    client_max_body_size 100m;
+    client_max_body_size ${NGINX_RELEASE_UPLOAD_BODY_SIZE};
 ${server_dns}
 ${ws_block}
 ${api_location}
@@ -2661,6 +2668,10 @@ ${proxy_ws}
     }
 
     location ^~ /idp-api/ {
+        client_max_body_size ${NGINX_RELEASE_UPLOAD_BODY_SIZE};
+        proxy_read_timeout 900s;
+        proxy_send_timeout 900s;
+        client_body_timeout 900s;
 ${proxy_idp}
 ${nginx_proxy_headers_api}
     }
@@ -2709,6 +2720,7 @@ server {
     listen 80;
     listen [::]:80;
     server_name ${domain};
+    client_max_body_size ${NGINX_RELEASE_UPLOAD_BODY_SIZE};
 ${server_dns}
 ${idp_api_block}
     location / {
@@ -2726,7 +2738,7 @@ ${http_preamble}server {
     listen [::]:443 ssl http2;
     server_name ${domain};
 ${ssl_block}
-    client_max_body_size 50m;
+    client_max_body_size ${NGINX_RELEASE_UPLOAD_BODY_SIZE};
 ${server_dns}
 ${idp_api_block}
     location / {
@@ -2761,7 +2773,7 @@ server {
     listen 80;
     listen [::]:80;
     server_name ${domain};
-    client_max_body_size 50m;
+    client_max_body_size ${NGINX_RELEASE_UPLOAD_BODY_SIZE};
 ${server_dns}
 ${idp_api_block}
     location / {
@@ -2779,7 +2791,7 @@ ${http_preamble}server {
     listen [::]:443 ssl http2;
     server_name ${domain};
 ${ssl_block}
-    client_max_body_size 50m;
+    client_max_body_size ${NGINX_RELEASE_UPLOAD_BODY_SIZE};
 ${server_dns}
 ${idp_api_block}
     location / {