diff --git a/Dockerfile b/Dockerfile
index 8f85fc4..2525c49 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -7,8 +7,8 @@ RUN cat /etc/os-release
 
 # Install necessary packages
 RUN apk update && \
-    apk add git pkgconf make g++ openssl libheif libheif-dev tiff tiff-dev && \
-    rustup target add x86_64-unknown-linux-gnu
+    apk add git pkgconf make g++ openssl openssl-dev libheif libheif-dev tiff tiff-dev && \
+    rustup target add x86_64-unknown-linux-musl
 
 # Create a new Rust binary project
 RUN USER=root cargo new --bin quoter
diff --git a/src/handlers/proxy.rs b/src/handlers/proxy.rs
index 9b75e7d..eca6024 100644
--- a/src/handlers/proxy.rs
+++ b/src/handlers/proxy.rs
@@ -35,14 +35,9 @@ pub async fn proxy_handler(
         "png" => "image/png",
         "webp" => "image/webp",
         "gif" => "image/gif",
-        "heic" | "heif" | "tiff" | "tif" => {
-            // Для HEIC и TIFF файлов мы всё равно будем отдавать оригинальный content-type,
-            // но при сохранении миниатюр они будут конвертированы в JPEG
-            match ext.as_str() {
-                "heic" | "heif" => "image/heic",
-                _ => "image/tiff"
-            }
-        },
+        "jfif" => "image/jpeg",
+        "heic" | "heif" => "image/heic",
+        "tif" | "tiff" => "image/tiff",
         "mp3" => "audio/mpeg",
         "wav" => "audio/x-wav",
         "ogg" => "audio/ogg",
diff --git a/src/thumbnail.rs b/src/thumbnail.rs
index 291822c..87859e4 100644
--- a/src/thumbnail.rs
+++ b/src/thumbnail.rs
@@ -132,7 +132,7 @@ pub async fn thumbdata_save(
         
         // Определяем выходной формат
         let output_ext = match ext.as_str() {
-            "heic" | "heif" | "tiff" | "tif" => "jpg", // Конвертируем HEIC и TIFF в JPEG
+            "heic" | "heif" => "jpg", // Конвертируем HEIC в JPEG
             _ => &ext
         };