diff --git a/Cargo.lock b/Cargo.lock
index c30967c..ba03ef0 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -55,11 +55,11 @@ dependencies = [
  "futures",
  "http",
  "log",
- "rustls",
+ "rustls 0.16.0",
  "tokio-rustls",
  "trust-dns-proto 0.18.0-alpha.2",
  "trust-dns-resolver 0.18.0-alpha.2",
- "webpki",
+ "webpki 0.21.3",
 ]
 
 [[package]]
@@ -173,9 +173,9 @@ dependencies = [
  "either",
  "futures",
  "log",
- "rustls",
+ "rustls 0.16.0",
  "tokio-rustls",
- "webpki",
+ "webpki 0.21.3",
  "webpki-roots 0.17.0",
 ]
 
@@ -293,7 +293,7 @@ dependencies = [
  "mime",
  "percent-encoding",
  "rand",
- "rustls",
+ "rustls 0.16.0",
  "serde",
  "serde_json",
  "serde_urlencoded",
@@ -380,9 +380,9 @@ checksum = "0e4cec68f03f32e44924783795810fa50a7035d8c8ebe78580ad7e6c703fba38"
 
 [[package]]
 name = "cc"
-version = "1.0.59"
+version = "1.0.70"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "66120af515773fb005778dc07c261bd201ec8ce50bd6e7144c927753fe013381"
+checksum = "d26a6ce4b6a484fa3edb70f7efa6fc430fd2b87285fe8b84304fd0936faa0dc0"
 
 [[package]]
 name = "cfg-if"
@@ -1174,9 +1174,9 @@ checksum = "1ab52be62400ca80aa00285d25253d7f7c437b7375c4de678f5405d3afe82ca5"
 
 [[package]]
 name = "once_cell"
-version = "1.4.1"
+version = "1.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "260e51e7efe62b592207e9e13a68e43692a7a279171d6ba57abd208bf23645ad"
+checksum = "692fcb63b64b1758029e0a96ee63e049ce8c5948587f2f7208df04625e5f6b56"
 
 [[package]]
 name = "openssl"
@@ -1445,9 +1445,9 @@ dependencies = [
 
 [[package]]
 name = "ring"
-version = "0.16.15"
+version = "0.16.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "952cd6b98c85bbc30efa1ba5783b8abf12fec8b3287ffa52605b9432313e34e4"
+checksum = "3053cf52e236a3ed746dfc745aa9cacf1b791d846bdaf412f60a8d7d6e17c8fc"
 dependencies = [
  "cc",
  "libc",
@@ -1473,8 +1473,20 @@ dependencies = [
  "base64 0.10.1",
  "log",
  "ring",
- "sct",
- "webpki",
+ "sct 0.6.0",
+ "webpki 0.21.3",
+]
+
+[[package]]
+name = "rustls"
+version = "0.20.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9b5ac6078ca424dc1d3ae2328526a76787fecc7f8011f520e3276730e711fc95"
+dependencies = [
+ "log",
+ "ring",
+ "sct 0.7.0",
+ "webpki 0.22.0",
 ]
 
 [[package]]
@@ -1509,6 +1521,16 @@ dependencies = [
  "untrusted",
 ]
 
+[[package]]
+name = "sct"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d53dcdb7c9f8158937a7981b48accfd39a43af418591a5d008c7b22b5e1b7ca4"
+dependencies = [
+ "ring",
+ "untrusted",
+]
+
 [[package]]
 name = "security-framework"
 version = "0.4.4"
@@ -1758,9 +1780,9 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3068d891551949b37681724d6b73666787cc63fa8e255c812a41d2513aff9775"
 dependencies = [
  "futures-core",
- "rustls",
+ "rustls 0.16.0",
  "tokio",
- "webpki",
+ "webpki 0.21.3",
 ]
 
 [[package]]
@@ -2106,7 +2128,7 @@ dependencies = [
  "crossbeam-channel 0.5.0",
  "futures",
  "reqwest",
- "rustls",
+ "rustls 0.20.0",
  "serde",
  "serde_json",
  "tokio",
@@ -2124,13 +2146,23 @@ dependencies = [
  "untrusted",
 ]
 
+[[package]]
+name = "webpki"
+version = "0.22.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f095d78192e208183081cc07bc5515ef55216397af48b873e5edcd72637fa1bd"
+dependencies = [
+ "ring",
+ "untrusted",
+]
+
 [[package]]
 name = "webpki-roots"
 version = "0.17.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a262ae37dd9d60f60dd473d1158f9fbebf110ba7b6a5051c8160460f6043718b"
 dependencies = [
- "webpki",
+ "webpki 0.21.3",
 ]
 
 [[package]]
@@ -2139,7 +2171,7 @@ version = "0.19.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f8eff4b7516a57307f9349c64bf34caa34b940b66fed4b2fb3136cb7386e5739"
 dependencies = [
- "webpki",
+ "webpki 0.21.3",
 ]
 
 [[package]]
diff --git a/Cargo.toml b/Cargo.toml
index ac02f8c..2607138 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -22,7 +22,7 @@ bytes = "0.5.6"
 actix-rt = "1.1.1"
 tokio = { version = "0.2.22", features = ["process"] }
 tokio-util = { version = "0.3.1", features = ["codec"] }
-rustls = "0.16"
+rustls = "0.20"
 webpki-roots = "0.19.0"
 clap = "2.33.3"
 crossbeam-channel = "0.5.0"