diff --git a/Cargo.lock b/Cargo.lock
index 41c1dcde5..43340accf 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -304,6 +304,15 @@ dependencies = [
  "alloc-no-stdlib",
 ]
 
+[[package]]
+name = "android_system_properties"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d7ed72e1635e121ca3e79420540282af22da58be50de153d36f81ddc6b83aa9e"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "ansi_term"
 version = "0.12.1"
@@ -506,10 +515,11 @@ checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
 [[package]]
 name = "chrono"
-version = "0.4.20"
+version = "0.4.21"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6127248204b9aba09a362f6c930ef6a78f2c1b2215f8a7b398c06e1083f17af0"
+checksum = "3f725f340c3854e3cb3ab736dc21f0cca183303acea3b3ffec30f141503ac8eb"
 dependencies = [
+ "iana-time-zone",
  "js-sys",
  "num-integer",
  "num-traits",
@@ -578,6 +588,22 @@ version = "0.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a2df960f5d869b2dd8532793fde43eb5427cceb126c929747a26823ab0eeb536"
 
+[[package]]
+name = "core-foundation"
+version = "0.9.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "194a7a9e6de53fa55116934067c844d9d749312f75c6f6d0980e8c252f8c2146"
+dependencies = [
+ "core-foundation-sys",
+ "libc",
+]
+
+[[package]]
+name = "core-foundation-sys"
+version = "0.8.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5827cebf4670468b8772dd191856768aedcb1b0278a04f989f7766351917b9dc"
+
 [[package]]
 name = "cpufeatures"
 version = "0.2.2"
@@ -972,6 +998,19 @@ version = "2.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9a3a5bfb195931eeb336b2a7b4d761daec841b97f947d34394601737a7bba5e4"
 
+[[package]]
+name = "iana-time-zone"
+version = "0.1.41"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1779539f58004e5dba1c1f093d44325ebeb244bfc04b791acdc0aaeca9c04570"
+dependencies = [
+ "android_system_properties",
+ "core-foundation",
+ "js-sys",
+ "wasm-bindgen",
+ "winapi 0.3.9",
+]
+
 [[package]]
 name = "idna"
 version = "0.2.3"
@@ -1055,9 +1094,9 @@ checksum = "112c678d4050afce233f4f2852bb2eb519230b3cf12f33585275537d7e41578d"
 
 [[package]]
 name = "js-sys"
-version = "0.3.57"
+version = "0.3.59"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "671a26f820db17c2a2750743f1dd03bafd15b98c9f30c7c2628c024c05d73397"
+checksum = "258451ab10b34f8af53416d1fdab72c22e805f0c92a1136d59470ec0b11138b2"
 dependencies = [
  "wasm-bindgen",
 ]
@@ -2315,9 +2354,9 @@ checksum = "fd6fbd9a79829dd1ad0cc20627bf1ed606756a7f77edff7b66b7064f9cb327c6"
 
 [[package]]
 name = "wasm-bindgen"
-version = "0.2.80"
+version = "0.2.82"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "27370197c907c55e3f1a9fbe26f44e937fe6451368324e009cba39e139dc08ad"
+checksum = "fc7652e3f6c4706c8d9cd54832c4a4ccb9b5336e2c3bd154d5cccfbf1c1f5f7d"
 dependencies = [
  "cfg-if 1.0.0",
  "wasm-bindgen-macro",
@@ -2325,13 +2364,13 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-backend"
-version = "0.2.80"
+version = "0.2.82"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "53e04185bfa3a779273da532f5025e33398409573f348985af9a1cbf3774d3f4"
+checksum = "662cd44805586bd52971b9586b1df85cdbbd9112e4ef4d8f41559c334dc6ac3f"
 dependencies = [
  "bumpalo",
- "lazy_static",
  "log",
+ "once_cell",
  "proc-macro2",
  "quote",
  "syn",
@@ -2340,9 +2379,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-macro"
-version = "0.2.80"
+version = "0.2.82"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "17cae7ff784d7e83a2fe7611cfe766ecf034111b49deb850a3dc7699c08251f5"
+checksum = "b260f13d3012071dfb1512849c033b1925038373aea48ced3012c09df952c602"
 dependencies = [
  "quote",
  "wasm-bindgen-macro-support",
@@ -2350,9 +2389,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-macro-support"
-version = "0.2.80"
+version = "0.2.82"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "99ec0dc7a4756fffc231aab1b9f2f578d23cd391390ab27f952ae0c9b3ece20b"
+checksum = "5be8e654bdd9b79216c2929ab90721aa82faf65c48cdf08bdc4e7f51357b80da"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -2363,9 +2402,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-shared"
-version = "0.2.80"
+version = "0.2.82"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d554b7f530dee5964d9a9468d95c1f8b8acae4f282807e7d27d4b03099a46744"
+checksum = "6598dd0bd3c7d51095ff6531a5b23e02acdc81804e30d8f07afb77b7215a140a"
 
 [[package]]
 name = "web-sys"
diff --git a/taskchampion/sync-server/Cargo.toml b/taskchampion/sync-server/Cargo.toml
index 273850e96..6a732c691 100644
--- a/taskchampion/sync-server/Cargo.toml
+++ b/taskchampion/sync-server/Cargo.toml
@@ -19,7 +19,7 @@ clap = "^3.2.10"
 log = "^0.4.17"
 env_logger = "^0.9.0"
 rusqlite = { version = "0.28", features = ["bundled"] }
-chrono = { version = "^0.4.20", features = ["serde"] }
+chrono = { version = "^0.4.21", features = ["serde"] }
 
 [dev-dependencies]
 actix-rt = "^1.1.1"
diff --git a/taskchampion/taskchampion/Cargo.toml b/taskchampion/taskchampion/Cargo.toml
index f31dc0f41..1c1b6e6ca 100644
--- a/taskchampion/taskchampion/Cargo.toml
+++ b/taskchampion/taskchampion/Cargo.toml
@@ -14,7 +14,7 @@ edition = "2018"
 uuid = { version = "^1.1.2", features = ["serde", "v4"] }
 serde = { version = "^1.0.143", features = ["derive"] }
 serde_json = "^1.0"
-chrono = { version = "^0.4.20", features = ["serde"] }
+chrono = { version = "^0.4.21", features = ["serde"] }
 anyhow = "1.0"
 thiserror = "1.0"
 ureq = "^2.5.0"