diff --git a/Cargo.lock b/Cargo.lock
index d2b9b9e..d28fccb 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -103,9 +103,9 @@ dependencies = [
 
 [[package]]
 name = "actix-cors"
-version = "0.6.5"
+version = "0.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0346d8c1f762b41b458ed3145eea914966bb9ad20b9be0d6d463b20d45586370"
+checksum = "f9e772b3bcafe335042b5db010ab7c09013dad6eac4915c91d8d50902769f331"
 dependencies = [
  "actix-utils",
  "actix-web",
@@ -218,9 +218,9 @@ dependencies = [
 
 [[package]]
 name = "actix-identity"
-version = "0.6.0"
+version = "0.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "36e1cc6f95e245b2f3c6995df4e1c0c697704c48c28ec325d135a3ca039d4952"
+checksum = "1478456bca71c7b04411da1afb0c506e16dec6863815207693b791247511027f"
 dependencies = [
  "actix-service",
  "actix-session",
@@ -367,9 +367,9 @@ dependencies = [
 
 [[package]]
 name = "actix-session"
-version = "0.8.0"
+version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2e6a28f813a6671e1847d005cad0be36ae4d016287690f765c303379837c13d6"
+checksum = "b671404ec72194d8af58c2bdaf51e3c477a0595056bd5010148405870dda8df2"
 dependencies = [
  "actix",
  "actix-redis",
@@ -377,7 +377,6 @@ dependencies = [
  "actix-utils",
  "actix-web",
  "anyhow",
- "async-trait",
  "derive_more",
  "futures-core",
  "rand 0.8.5",
@@ -411,20 +410,19 @@ dependencies = [
 
 [[package]]
 name = "actix-tls"
-version = "3.1.1"
+version = "3.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "72616e7fbec0aa99c6f3164677fa48ff5a60036d0799c98cab894a44f3e0efc3"
+checksum = "929e47cc23865cdb856e59673cfba2d28f00b3bbd060dfc80e33a00a3cea8317"
 dependencies = [
  "actix-rt",
  "actix-service",
  "actix-utils",
  "futures-core",
  "http 0.2.9",
+ "http 1.0.0",
  "impl-more",
  "openssl",
  "pin-project-lite 0.2.13",
- "rustls 0.21.10",
- "rustls-webpki",
  "tokio 1.35.1",
  "tokio-openssl",
  "tokio-rustls 0.23.4",
@@ -2948,16 +2946,26 @@ dependencies = [
 ]
 
 [[package]]
-name = "env_logger"
-version = "0.10.2"
+name = "env_filter"
+version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4cd405aab171cb85d6735e5c8d9db038c17d3ca007a4d2c25f337935c3d90580"
+checksum = "a009aa4810eb158359dda09d0c87378e4bbb89b5a801f016885a4707ba24f7ea"
 dependencies = [
- "humantime",
- "is-terminal",
  "log",
  "regex",
- "termcolor",
+]
+
+[[package]]
+name = "env_logger"
+version = "0.11.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "05e7cf40684ae96ade6232ed84582f40ce0a66efcd43a5117aef610534f8e0b8"
+dependencies = [
+ "anstream",
+ "anstyle",
+ "env_filter",
+ "humantime",
+ "log",
 ]
 
 [[package]]
@@ -4175,17 +4183,6 @@ version = "2.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8f518f335dce6725a761382244631d86cf0ccb2863413590b31338feb467f9c3"
 
-[[package]]
-name = "is-terminal"
-version = "0.4.9"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cb0889898416213fab133e1d33a0e5858a48177452750691bde3666d0fdbaf8b"
-dependencies = [
- "hermit-abi",
- "rustix",
- "windows-sys 0.48.0",
-]
-
 [[package]]
 name = "itertools"
 version = "0.11.0"
@@ -8197,7 +8194,7 @@ version = "1.6.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "97fee6b57c6a41524a810daee9286c02d7752c4253064d0b05472833a438f675"
 dependencies = [
- "cfg-if 0.1.10",
+ "cfg-if 1.0.0",
  "rand 0.8.5",
  "static_assertions",
 ]
diff --git a/Cargo.toml b/Cargo.toml
index 6746d53..6dfb996 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -77,16 +77,16 @@ rust-version = "1.72"
 actix = "0.13"
 actix-broker = "0.4"
 actix-codec = "0.5"
-actix-cors = "0.6"
+actix-cors = "0.7"
 actix-files = "0.6"
 actix-http = "3.5"
-actix-identity = "0.6"
+actix-identity = "0.7"
 actix-multipart = "0.6"
 actix-multipart-derive = "0.6"
 actix-protobuf = "0.10"
-actix-session = "0.8"
+actix-session = "0.9"
 actix-test = "0.1"
-actix-tls = "3.1.1"
+actix-tls = "3.2"
 actix-utils = "3"
 actix-web = "4.4"
 actix-web-actors = "4.1"
@@ -97,7 +97,7 @@ awc = "3.2"
 chrono = { version = "0.4.20", default-features = false, features = ["clock", "serde"] }
 derive_more = "0.99.7"
 dotenvy = "0.15"
-env_logger = "0.10"
+env_logger = "0.11"
 futures-util = { version = "0.3.17", default-features = false, features = ["std"] }
 log = "0.4"
 openssl = { version = "0.10.60", features = ["v110"] }
diff --git a/json/json-decode-error/Cargo.toml b/json/json-decode-error/Cargo.toml
index 1ec786d..91c8f5a 100644
--- a/json/json-decode-error/Cargo.toml
+++ b/json/json-decode-error/Cargo.toml
@@ -8,4 +8,4 @@ actix-web.workspace = true
 
 env_logger.workspace = true
 log.workspace = true
-serde = "1"
+serde.workspace = true
diff --git a/json/json-decode-error/src/main.rs b/json/json-decode-error/src/main.rs
index eed6819..c9f87fd 100644
--- a/json/json-decode-error/src/main.rs
+++ b/json/json-decode-error/src/main.rs
@@ -1,7 +1,7 @@
 use actix_web::{error, post, web, App, HttpRequest, HttpResponse, HttpServer, Responder};
 use serde::Deserialize;
 
-#[derive(Deserialize)]
+#[derive(Debug, Deserialize)]
 struct Info {
     name: String,
 }
@@ -38,6 +38,7 @@ async fn main() -> std::io::Result<()> {
                 .error_handler(json_error_handler),
         )
     })
+    .workers(2)
     .bind(("127.0.0.1", 8080))?
     .run()
     .await
diff --git a/json/json-error/src/main.rs b/json/json-error/src/main.rs
index dda7c3a..2e4d06a 100644
--- a/json/json-error/src/main.rs
+++ b/json/json-error/src/main.rs
@@ -1,13 +1,9 @@
 //! This example is meant to show how to automatically generate a json error response when something goes wrong.
 
-use std::{
-    fmt::{Display, Formatter, Result as FmtResult},
-    io,
-};
+use std::{fmt, io};
 
 use actix_web::{http::StatusCode, web, App, HttpResponse, HttpServer, ResponseError};
 use serde::Serialize;
-use serde_json::{json, to_string_pretty};
 
 #[derive(Debug, Serialize)]
 struct Error {
@@ -15,16 +11,16 @@ struct Error {
     status: u16,
 }
 
-impl Display for Error {
-    fn fmt(&self, f: &mut Formatter) -> FmtResult {
-        write!(f, "{}", to_string_pretty(self).unwrap())
+impl fmt::Display for Error {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "{}", serde_json::to_string_pretty(self).unwrap())
     }
 }
 
 impl ResponseError for Error {
     // builds the actual response to send back when an error occurs
     fn error_response(&self) -> HttpResponse {
-        let err_json = json!({ "error": self.msg });
+        let err_json = serde_json::json!({ "error": self.msg });
         HttpResponse::build(StatusCode::from_u16(self.status).unwrap()).json(err_json)
     }
 }
@@ -43,6 +39,7 @@ async fn main() -> io::Result<()> {
     log::info!("starting HTTP server at http://localhost:8080");
 
     HttpServer::new(|| App::new().service(web::resource("/").route(web::get().to(index))))
+        .workers(2)
         .bind(("127.0.0.1", 8080))?
         .run()
         .await