diff --git a/Cargo.lock b/Cargo.lock
index ec1b395..2cc6d49 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -34,9 +34,9 @@ dependencies = [
 
 [[package]]
 name = "anyhow"
-version = "1.0.55"
+version = "1.0.56"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "159bb86af3a200e19a068f4224eae4c8bb2d0fa054c7e5d1cacd5cef95e684cd"
+checksum = "4361135be9122e0870de935d7c439aef945b9f9ddd4199a553b5270b49c82a27"
 
 [[package]]
 name = "atty"
@@ -121,9 +121,9 @@ dependencies = [
 
 [[package]]
 name = "clap"
-version = "3.1.3"
+version = "3.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "86f8c0e2a6b902acc18214e24a6935cdaf8a8e34231913d4404dcaee659f65a1"
+checksum = "d8c93436c21e4698bacadf42917db28b23017027a4deccb35dbe47a7e7840123"
 dependencies = [
  "atty",
  "bitflags",
@@ -136,18 +136,18 @@ dependencies = [
 
 [[package]]
 name = "cortex-a"
-version = "7.0.1"
+version = "7.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5bd95fd055d118f77d4e4d527201b6ceccd13586b19b4dac1270f7081fef0f98"
+checksum = "27bd91f65ccd348bb2d043d98c5b34af141ecef7f102147f59bf5898f6e734ad"
 dependencies = [
  "tock-registers",
 ]
 
 [[package]]
 name = "crossterm"
-version = "0.23.0"
+version = "0.23.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "77b75a27dc8d220f1f8521ea69cd55a34d720a200ebb3a624d9aa19193d3b432"
+checksum = "f1fd7173631a4e9e2ca8b32ae2fad58aab9843ea5aaf56642661937d87e28a3e"
 dependencies = [
  "bitflags",
  "crossterm_winapi",
@@ -326,9 +326,9 @@ dependencies = [
 
 [[package]]
 name = "libc"
-version = "0.2.119"
+version = "0.2.121"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1bf2e165bb3457c8e098ea76f3e3bc9db55f87aa90d52d0e6be741470916aaa4"
+checksum = "efaa7b300f3b5fe8eb6bf21ce3895e1751d9665086af2d64b42f19701015ff4f"
 
 [[package]]
 name = "lock_api"
@@ -341,9 +341,9 @@ dependencies = [
 
 [[package]]
 name = "log"
-version = "0.4.14"
+version = "0.4.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "51b9bbe6c47d51fc3e1a9b945965946b4c44142ab8792c50835a980d362c2710"
+checksum = "6389c490849ff5bc16be905ae24bc913a9c8892e19b2341dbc175e14c341c2b8"
 dependencies = [
  "cfg-if",
 ]
@@ -412,26 +412,27 @@ dependencies = [
 
 [[package]]
 name = "mio"
-version = "0.8.0"
+version = "0.8.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ba272f85fa0b41fc91872be579b3bbe0f56b792aa361a380eb669469f68dafb2"
+checksum = "52da4364ffb0e4fe33a9841a98a3f3014fb964045ce4f7a45a398243c8d6b0c9"
 dependencies = [
  "libc",
  "log",
  "miow",
  "ntapi",
+ "wasi",
  "winapi",
 ]
 
 [[package]]
 name = "mio-serial"
-version = "5.0.1"
+version = "5.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d6f47dcdec193b77e2166faa0e3be4ee04f324ce6780c54efe7af6c3ee7360e4"
+checksum = "531e0f6dc55a5aa7b8d320407c5c4ced464e23815c60f6a1e6d9e225d2b45905"
 dependencies = [
  "log",
- "mio 0.7.14",
- "nix 0.22.3",
+ "mio 0.8.2",
+ "nix",
  "serialport",
  "winapi",
 ]
@@ -445,19 +446,6 @@ dependencies = [
  "winapi",
 ]
 
-[[package]]
-name = "nix"
-version = "0.22.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e4916f159ed8e5de0082076562152a76b7a1f64a01fd9d1e0fea002c37624faf"
-dependencies = [
- "bitflags",
- "cc",
- "cfg-if",
- "libc",
- "memoffset",
-]
-
 [[package]]
 name = "nix"
 version = "0.23.1"
@@ -508,9 +496,9 @@ dependencies = [
 
 [[package]]
 name = "once_cell"
-version = "1.9.0"
+version = "1.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "da32515d9f6e6e489d7bc9d84c71b060db7247dc035bbe44eac88cf87486d8d5"
+checksum = "87f3e037eac156d1775da914196f0f37741a274155e34a0b7e427c35d2a2ecb9"
 
 [[package]]
 name = "os_str_bytes"
@@ -573,9 +561,9 @@ checksum = "9ff023245bfcc73fb890e1f8d5383825b3131cc920020a5c487d6f113dfc428a"
 
 [[package]]
 name = "quote"
-version = "1.0.15"
+version = "1.0.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "864d3e96a899863136fc6e99f3d7cae289dafe43bf2c5ac19b70df7210c0a145"
+checksum = "632d02bff7f874a36f33ea8bb416cd484b90cc66c1194b1a1110d067a7013f58"
 dependencies = [
  "proc-macro2",
 ]
@@ -588,18 +576,18 @@ checksum = "bd7a31eed1591dcbc95d92ad7161908e72f4677f8fabf2a32ca49b4237cbf211"
 
 [[package]]
 name = "redox_syscall"
-version = "0.2.11"
+version = "0.2.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8380fe0152551244f0747b1bf41737e0f8a74f97a14ccefd1148187271634f3c"
+checksum = "8ae183fc1b06c149f0c1793e1eb447c8b04bfe46d48e9e48bfb8d2d7ed64ecf0"
 dependencies = [
  "bitflags",
 ]
 
 [[package]]
 name = "regex"
-version = "1.5.4"
+version = "1.5.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d07a8629359eb56f1e2fb1652bb04212c072a87ba68546a04065d525673ac461"
+checksum = "1a11647b6b25ff05a515cb92c365cec08801e83423a235b51e231e1808747286"
 dependencies = [
  "aho-corasick",
  "memchr",
@@ -634,7 +622,7 @@ dependencies = [
  "bitflags",
  "cfg-if",
  "mach 0.2.3",
- "nix 0.23.1",
+ "nix",
  "regex",
  "winapi",
 ]
@@ -651,9 +639,9 @@ dependencies = [
 
 [[package]]
 name = "signal-hook-mio"
-version = "0.2.1"
+version = "0.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "29fd5867f1c4f2c5be079aee7a2adf1152ebb04a4bc4d341f504b7dece607ed4"
+checksum = "29ad2e15f37ec9a6cc544097b78a1ec90001e9f71b81338ca39f430adaca99af"
 dependencies = [
  "libc",
  "mio 0.7.14",
@@ -721,9 +709,9 @@ checksum = "73473c0e59e6d5812c5dfe2a064a6444949f089e20eec9a2e5506596494e4623"
 
 [[package]]
 name = "syn"
-version = "1.0.86"
+version = "1.0.89"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8a65b3f4ffa0092e9887669db0eae07941f023991ab58ea44da8fe8e2d511c6b"
+checksum = "ea297be220d52398dcc07ce15a209fce436d361735ac1db700cab3b6cdfb9f54"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -732,18 +720,18 @@ dependencies = [
 
 [[package]]
 name = "termcolor"
-version = "1.1.2"
+version = "1.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2dfed899f0eb03f32ee8c6a0aabdb8a7949659e3466561fc0adf54e26d88c5f4"
+checksum = "bab24d30b911b2376f3a13cc2cd443142f0c81dda04c118693e35b3835757755"
 dependencies = [
  "winapi-util",
 ]
 
 [[package]]
 name = "textwrap"
-version = "0.14.2"
+version = "0.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0066c8d12af8b5acd21e00547c3797fde4e8677254a7ee429176ccebbe93dd80"
+checksum = "b1141d4d61095b28419e22cb0bbf02755f5e54e0526f97f1e3d1d160e60885fb"
 
 [[package]]
 name = "tock-registers"
@@ -760,7 +748,7 @@ dependencies = [
  "bytes",
  "libc",
  "memchr",
- "mio 0.8.0",
+ "mio 0.8.2",
  "num_cpus",
  "once_cell",
  "parking_lot",
@@ -784,9 +772,9 @@ dependencies = [
 
 [[package]]
 name = "tokio-serial"
-version = "5.4.1"
+version = "5.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c75b04fbb029a3f77272b3356453c97c5dbdebcf28aa248a34fd80a442f2dda1"
+checksum = "e5488e0c75c70e880823aebc3ad4ac0a6da6f48d95bc1b9a52bd3200d6f1e724"
 dependencies = [
  "cfg-if",
  "futures",
@@ -829,9 +817,15 @@ checksum = "f70329e2cbe45d6c97a5112daad40c34cd9a4e18edb5a2a18fefeb584d8d25e5"
 
 [[package]]
 name = "ux"
-version = "0.1.3"
+version = "0.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "88dfeb711b61ce620c0cb6fd9f8e3e678622f0c971da2a63c4b3e25e88ed012f"
+checksum = "5efdcf885b33bb81bc9336e66cebc10d503288449466c0e43e51250ddc93a3d8"
+
+[[package]]
+name = "wasi"
+version = "0.11.0+wasi-snapshot-preview1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
 
 [[package]]
 name = "winapi"
diff --git a/bin/chainboot/Cargo.toml b/bin/chainboot/Cargo.toml
index 070cdac..f8055bd 100644
--- a/bin/chainboot/Cargo.toml
+++ b/bin/chainboot/Cargo.toml
@@ -28,7 +28,7 @@ rpi4 = ["machine/rpi4"]
 [dependencies]
 machine = { path = "../../machine" }
 r0 = "1.0"
-cortex-a = "7.0"
+cortex-a = "7.2"
 tock-registers = "0.7"
 ux = { version = "0.1", default-features = false }
 usize_conversions = "0.2"
diff --git a/machine/Cargo.toml b/machine/Cargo.toml
index bc6c63e..ad72d91 100644
--- a/machine/Cargo.toml
+++ b/machine/Cargo.toml
@@ -30,7 +30,7 @@ rpi4 = []
 [dependencies]
 r0 = "1.0"
 qemu-exit = "3.0"
-cortex-a = "7.0"
+cortex-a = "7.2"
 tock-registers = "0.7"
 ux = { version = "0.1", default-features = false }
 usize_conversions = "0.2"
diff --git a/nucleus/Cargo.toml b/nucleus/Cargo.toml
index 70a24f8..6ccfb4c 100644
--- a/nucleus/Cargo.toml
+++ b/nucleus/Cargo.toml
@@ -29,7 +29,7 @@ rpi4 = ["machine/rpi4"]
 [dependencies]
 machine = { path = "../machine" }
 r0 = "1.0"
-cortex-a = "7.0"
+cortex-a = "7.2"
 tock-registers = "0.7"
 ux = { version = "0.1", default-features = false }
 usize_conversions = "0.2"