diff --git a/Cargo.lock b/Cargo.lock
index 16c26b1..448fc36 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -6,7 +6,7 @@ version = "0.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1be241f88f3b1e7e9a3fbe3b5a8a0f6915b5a1d7ee0d9a248d3376d01068cc60"
 dependencies = [
- "actix-rt 1.1.1",
+ "actix-rt",
  "actix_derive",
  "bitflags",
  "bytes 0.5.6",
@@ -48,7 +48,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "177837a10863f15ba8d3ae3ec12fac1099099529ed20083a27fdfe247381d0dc"
 dependencies = [
  "actix-codec",
- "actix-rt 1.1.1",
+ "actix-rt",
  "actix-service",
  "actix-utils",
  "derive_more",
@@ -68,7 +68,7 @@ checksum = "452299e87817ae5673910e53c243484ca38be3828db819b6011736fc6982e874"
 dependencies = [
  "actix-codec",
  "actix-connect",
- "actix-rt 1.1.1",
+ "actix-rt",
  "actix-service",
  "actix-threadpool",
  "actix-utils",
@@ -117,16 +117,6 @@ dependencies = [
  "syn",
 ]
 
-[[package]]
-name = "actix-macros"
-version = "0.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dbcb2b608f0accc2f5bcf3dd872194ce13d94ee45b571487035864cf966b04ef"
-dependencies = [
- "quote",
- "syn",
-]
-
 [[package]]
 name = "actix-multipart"
 version = "0.3.0"
@@ -164,7 +154,7 @@ version = "1.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "143fcc2912e0d1de2bcf4e2f720d2a60c28652ab4179685a1ee159e0fb3db227"
 dependencies = [
- "actix-macros 0.1.3",
+ "actix-macros",
  "actix-threadpool",
  "copyless",
  "futures-channel",
@@ -173,17 +163,6 @@ dependencies = [
  "tokio 0.2.25",
 ]
 
-[[package]]
-name = "actix-rt"
-version = "2.0.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c88cf46527e27f66efcd5831f60b3d9c2dac795b6d255ed17791752d6c36a8ea"
-dependencies = [
- "actix-macros 0.2.0",
- "futures-core",
- "tokio 1.2.0",
-]
-
 [[package]]
 name = "actix-server"
 version = "1.0.4"
@@ -191,7 +170,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "45407e6e672ca24784baa667c5d32ef109ccdd8d5e0b5ebb9ef8a67f4dfb708e"
 dependencies = [
  "actix-codec",
- "actix-rt 1.1.1",
+ "actix-rt",
  "actix-service",
  "actix-utils",
  "futures-channel",
@@ -220,8 +199,8 @@ version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "47239ca38799ab74ee6a8a94d1ce857014b2ac36f242f70f3f75a66f691e791c"
 dependencies = [
- "actix-macros 0.1.3",
- "actix-rt 1.1.1",
+ "actix-macros",
+ "actix-rt",
  "actix-server",
  "actix-service",
  "log",
@@ -262,7 +241,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2e9022dec56632d1d7979e59af14f0597a28a830a9c1c7fec8b2327eb9f16b5a"
 dependencies = [
  "actix-codec",
- "actix-rt 1.1.1",
+ "actix-rt",
  "actix-service",
  "bitflags",
  "bytes 0.5.6",
@@ -283,9 +262,9 @@ checksum = "e641d4a172e7faa0862241a20ff4f1f5ab0ab7c279f00c2d4587b77483477b86"
 dependencies = [
  "actix-codec",
  "actix-http",
- "actix-macros 0.1.3",
+ "actix-macros",
  "actix-router",
- "actix-rt 1.1.1",
+ "actix-rt",
  "actix-server",
  "actix-service",
  "actix-testing",
@@ -456,7 +435,7 @@ checksum = "b381e490e7b0cfc37ebc54079b0413d8093ef43d14a4e4747083f7fa47a9e691"
 dependencies = [
  "actix-codec",
  "actix-http",
- "actix-rt 1.1.1",
+ "actix-rt",
  "actix-service",
  "base64 0.13.0",
  "bytes 0.5.6",
@@ -714,7 +693,7 @@ version = "0.1.0"
 dependencies = [
  "actix",
  "actix-multipart",
- "actix-rt 2.0.2",
+ "actix-rt",
  "actix-web",
  "actix-web-actors",
  "bcrypt",
@@ -2851,11 +2830,7 @@ dependencies = [
  "memchr",
  "mio 0.7.8",
  "num_cpus",
- "once_cell",
- "parking_lot",
  "pin-project-lite 0.2.4",
- "signal-hook-registry",
- "winapi 0.3.9",
 ]
 
 [[package]]
diff --git a/Cargo.toml b/Cargo.toml
index 3b21245..89f3816 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,7 +11,7 @@ yaml-rust = "0.4.5"
 mysql = "20.1.0"
 actix = "0.10.0"
 actix-web = "3.3.2"
-actix-rt = "2.0.2"
+actix-rt = "1.1.1"
 actix-multipart = "0.3.0"
 actix-web-actors = "3.0.0"
 serde = { version = "1.0.123", features = ["derive"] }
diff --git a/src/data/base_request_handler.rs b/src/data/base_request_handler.rs
index 70d7eb9..01b2e41 100644
--- a/src/data/base_request_handler.rs
+++ b/src/data/base_request_handler.rs
@@ -36,7 +36,7 @@ struct SuccessMessage {
 
 pub struct PostFile {
     pub name: String,
-    pub buff: bytes::Bytes,
+    pub buff: actix_web::web::Bytes,
 }
 
 /// Single request body  value
diff --git a/src/data/error.rs b/src/data/error.rs
index dee74c8..dd084a2 100644
--- a/src/data/error.rs
+++ b/src/data/error.rs
@@ -1,8 +1,7 @@
 use core::fmt;
 use std::error;
 use std::error::Error;
-
-use serde::export::Formatter;
+use std::fmt::Formatter;
 
 /// Simple rust error
 ///
@@ -37,4 +36,5 @@ impl fmt::Display for ExecError {
     }
 }
 
+
 impl error::Error for ExecError {}
\ No newline at end of file
diff --git a/src/server.rs b/src/server.rs
index e78424e..d7730ae 100644
--- a/src/server.rs
+++ b/src/server.rs
@@ -4,8 +4,7 @@ use std::pin::Pin;
 use actix_web::{App, FromRequest, http, HttpMessage, HttpRequest, HttpResponse, HttpServer, web};
 use actix_web::dev::{Decompress, Payload, PayloadStream};
 use actix_web::error::{ErrorBadRequest, ErrorInternalServerError, PayloadError};
-use actix_web::web::{Bytes, BytesMut};
-use bytes::{Buf, BufMut};
+use actix_web::web::{Bytes, BytesMut, BufMut, Buf};
 use encoding_rs::UTF_8;
 use futures::{FutureExt, Stream, StreamExt};
 use futures::future::LocalBoxFuture;
diff --git a/src/utils/crypt_utils.rs b/src/utils/crypt_utils.rs
index 070a6fa..439a30c 100644
--- a/src/utils/crypt_utils.rs
+++ b/src/utils/crypt_utils.rs
@@ -59,6 +59,7 @@ pub fn legacy_crypt_pass(pass: &str) -> ResultBoxError<String> {
 pub fn rand_str(len: usize) -> String {
     thread_rng()
         .sample_iter(&Alphanumeric)
+        .map(char::from)
         .take(len)
         .collect()
 }
\ No newline at end of file
diff --git a/src/utils/pdf_utils.rs b/src/utils/pdf_utils.rs
index 0d980dd..1cf0794 100644
--- a/src/utils/pdf_utils.rs
+++ b/src/utils/pdf_utils.rs
@@ -7,10 +7,12 @@ use pdf::backend::Backend;
 use crate::data::error::{ExecError, ResultBoxError};
 
 /// Check out whether a PDF is a valid PDF or not, by trying to open it
-pub fn is_valid_pdf(file: &bytes::Bytes) -> ResultBoxError<bool> {
+pub fn is_valid_pdf(file: &actix_web::web::Bytes) -> ResultBoxError<bool> {
     let backend = file.to_vec();
 
-    match backend.read_xref_table_and_trailer() {
+    let start_offset = backend.locate_start_offset()?;
+
+    match backend.read_xref_table_and_trailer(start_offset) {
         Ok((refs, _)) => {
             if refs.is_empty() {
                 Err(ExecError::boxed_string(format!("Detected a PDF with 0 references (file size: {})!", file.len())))
@@ -20,7 +22,7 @@ pub fn is_valid_pdf(file: &bytes::Bytes) -> ResultBoxError<bool> {
         }
 
         Err(e) => {
-            println!("Error while parsing PDF: {}", e);
+            println!("Error while parsing PDF: {:?}", e);
             Ok(false)
         }
     }