diff --git a/Cargo.lock b/Cargo.lock
index af787b3e..5819260a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -150,15 +150,16 @@ checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
 [[package]]
 name = "chrono"
-version = "0.4.19"
+version = "0.4.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "670ad68c9088c2a963aaa298cb369688cf3f9465ce5e2d4ca10e6e0098a1ce73"
+checksum = "6127248204b9aba09a362f6c930ef6a78f2c1b2215f8a7b398c06e1083f17af0"
 dependencies = [
- "libc",
+ "js-sys",
  "num-integer",
  "num-traits",
  "serde",
  "time",
+ "wasm-bindgen",
  "winapi",
 ]
 
diff --git a/tough/Cargo.toml b/tough/Cargo.toml
index 4647b1b7..0968d3c7 100644
--- a/tough/Cargo.toml
+++ b/tough/Cargo.toml
@@ -9,7 +9,7 @@ keywords = ["tuf", "update", "repository"]
 edition = "2018"
 
 [dependencies]
-chrono = { version = "0.4.11", features = ["serde"] }
+chrono = { version = "0.4.20", features = ["serde"] }
 dyn-clone = "1.0.5"
 globset = { version = "0.4.8" }
 hex = "0.4.2"
diff --git a/tuftool/Cargo.toml b/tuftool/Cargo.toml
index 04cc17d1..0ec0b558 100644
--- a/tuftool/Cargo.toml
+++ b/tuftool/Cargo.toml
@@ -16,7 +16,7 @@ rusoto-native-tls = ["rusoto_core/native-tls", "rusoto_credential", "rusoto_ssm/
 rusoto-rustls = ["rusoto_core/rustls", "rusoto_credential", "rusoto_ssm/rustls", "rusoto_kms/rustls",]
 
 [dependencies]
-chrono = "0.4.11"
+chrono = "0.4.20"
 hex = "0.4.2"
 log = "0.4.8"
 maplit = "1.0.1"