diff --git a/Cargo.lock b/Cargo.lock
index 1fa232c3..e9020b2b 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1083,6 +1083,23 @@ dependencies = [
  "want",
 ]
 
+[[package]]
+name = "hyper-rustls"
+version = "0.27.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5ee4be2c948921a1a5320b629c4193916ed787a7f7f293fd3f7f5a6c9de74155"
+dependencies = [
+ "futures-util",
+ "http 1.1.0",
+ "hyper 1.2.0",
+ "hyper-util",
+ "rustls",
+ "rustls-pki-types",
+ "tokio",
+ "tokio-rustls",
+ "tower-service",
+]
+
 [[package]]
 name = "hyper-tls"
 version = "0.6.0"
@@ -2063,9 +2080,9 @@ checksum = "c08c74e62047bb2de4ff487b251e4a92e24f48745648451635cec7d591162d9f"
 
 [[package]]
 name = "reqwest"
-version = "0.12.4"
+version = "0.12.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "566cafdd92868e0939d3fb961bd0dc25fcfaaed179291093b3d43e6b3150ea10"
+checksum = "c7d6d2a27d57148378eb5e111173f4276ad26340ecc5c49a4a2152167a2d6a37"
 dependencies = [
  "base64 0.22.0",
  "bytes",
@@ -2078,6 +2095,7 @@ dependencies = [
  "http-body 1.0.0",
  "http-body-util",
  "hyper 1.2.0",
+ "hyper-rustls",
  "hyper-tls",
  "hyper-util",
  "ipnet",
@@ -2104,6 +2122,21 @@ dependencies = [
  "winreg",
 ]
 
+[[package]]
+name = "ring"
+version = "0.17.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c17fa4cb658e3583423e915b9f3acc01cceaee1860e33d59ebae66adc3a2dc0d"
+dependencies = [
+ "cc",
+ "cfg-if",
+ "getrandom",
+ "libc",
+ "spin",
+ "untrusted",
+ "windows-sys 0.52.0",
+]
+
 [[package]]
 name = "rustc-demangle"
 version = "0.1.23"
@@ -2123,6 +2156,19 @@ dependencies = [
  "windows-sys 0.52.0",
 ]
 
+[[package]]
+name = "rustls"
+version = "0.23.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ebbbdb961df0ad3f2652da8f3fdc4b36122f568f968f45ad3316f26c025c677b"
+dependencies = [
+ "once_cell",
+ "rustls-pki-types",
+ "rustls-webpki",
+ "subtle",
+ "zeroize",
+]
+
 [[package]]
 name = "rustls-pemfile"
 version = "1.0.4"
@@ -2148,6 +2194,17 @@ version = "1.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ecd36cc4259e3e4514335c4a138c6b43171a8d61d8f5c9348f9fc7529416f247"
 
+[[package]]
+name = "rustls-webpki"
+version = "0.102.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f3bce581c0dd41bce533ce695a1437fa16a7ab5ac3ccfa99fe1a620a7885eabf"
+dependencies = [
+ "ring",
+ "rustls-pki-types",
+ "untrusted",
+]
+
 [[package]]
 name = "rustversion"
 version = "1.0.14"
@@ -2276,9 +2333,9 @@ dependencies = [
 
 [[package]]
 name = "serde_json"
-version = "1.0.117"
+version = "1.0.118"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "455182ea6142b14f93f4bc5320a2b31c1f266b66a4a5c858b013302a5d8cbfc3"
+checksum = "d947f6b3163d8857ea16c4fa0dd4840d52f3041039a85decd46867eb1abef2e4"
 dependencies = [
  "itoa",
  "ryu",
@@ -2452,6 +2509,12 @@ version = "0.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5ee073c9e4cd00e28217186dbe12796d692868f432bf2e97ee73bed0c56dfa01"
 
+[[package]]
+name = "subtle"
+version = "2.6.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "13c2bddecc57b384dee18652358fb23172facb8a2c51ccc10d74c157bdea3292"
+
 [[package]]
 name = "syn"
 version = "1.0.109"
@@ -2486,9 +2549,9 @@ dependencies = [
 
 [[package]]
 name = "sync_wrapper"
-version = "0.1.2"
+version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2047c6ded9c721764247e62cd3b03c09ffc529b2ba5b10ec482ae507a4a70160"
+checksum = "a7065abeca94b6a8a577f9bd45aa0867a2238b74e8eb67cf10d492bc39351394"
 
 [[package]]
 name = "system-configuration"
@@ -2638,6 +2701,17 @@ dependencies = [
  "tokio",
 ]
 
+[[package]]
+name = "tokio-rustls"
+version = "0.26.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0c7bc40d0e5a97695bb96e27995cd3a08538541b0a846f65bba7a359f36700d4"
+dependencies = [
+ "rustls",
+ "rustls-pki-types",
+ "tokio",
+]
+
 [[package]]
 name = "tokio-stream"
 version = "0.1.14"
@@ -2850,6 +2924,12 @@ dependencies = [
  "tempfile",
 ]
 
+[[package]]
+name = "untrusted"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8ecb6da28b8a351d773b68d5825ac39017e680750f980f3a1a85cd8dd28a47c1"
+
 [[package]]
 name = "url"
 version = "2.5.0"
@@ -3229,3 +3309,9 @@ version = "0.1.0"
 dependencies = [
  "zerocopy",
 ]
+
+[[package]]
+name = "zeroize"
+version = "1.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ced3678a2879b30306d323f4542626697a464a97c0a07c9aebf7ebca65cd4dde"
diff --git a/mdbook-course/Cargo.toml b/mdbook-course/Cargo.toml
index f984257f..c1164363 100644
--- a/mdbook-course/Cargo.toml
+++ b/mdbook-course/Cargo.toml
@@ -18,5 +18,5 @@ mdbook = "0.4.40"
 pretty_env_logger = "0.5.0"
 regex = "1.10"
 serde = "1.0.203"
-serde_json = "1.0.117"
+serde_json = "1.0.118"
 serde_yaml = "0.9"
diff --git a/src/concurrency/sync-exercises/Cargo.toml b/src/concurrency/sync-exercises/Cargo.toml
index e88a243c..882e80aa 100644
--- a/src/concurrency/sync-exercises/Cargo.toml
+++ b/src/concurrency/sync-exercises/Cargo.toml
@@ -13,7 +13,7 @@ name = "link-checker"
 path = "link-checker.rs"
 
 [dependencies]
-reqwest = { version = "0.12.4", features = ["blocking"] }
+reqwest = { version = "0.12.5", features = ["blocking"] }
 scraper = "0.19.0"
 thiserror = "1.0.61"