diff --git a/firmware/Cargo.lock b/firmware/Cargo.lock
index 8fe2a11..a16a298 100644
--- a/firmware/Cargo.lock
+++ b/firmware/Cargo.lock
@@ -18,7 +18,7 @@ name = "chrono"
 version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "num 0.1.41 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)",
  "time 0.1.39 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -34,13 +34,13 @@ dependencies = [
 
 [[package]]
 name = "cortex-m-rt"
-version = "0.3.12"
+version = "0.3.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "chrono 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "cortex-m 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "r0 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc_version 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustc_version 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -48,7 +48,7 @@ name = "ionpak-firmware"
 version = "1.0.0"
 dependencies = [
  "cortex-m 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "cortex-m-rt 0.3.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cortex-m-rt 0.3.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "smoltcp 0.4.0 (git+https://github.com/m-labs/smoltcp?rev=cb5be48)",
  "tm4c129x 0.5.0 (git+https://github.com/m-labs/dslite2svd?rev=d527f3f)",
  "walkdir 1.0.7 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -65,7 +65,7 @@ dependencies = [
 
 [[package]]
 name = "libc"
-version = "0.2.36"
+version = "0.2.40"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -75,34 +75,34 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "num"
-version = "0.1.41"
+version = "0.1.42"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "num-integer 0.1.35 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-iter 0.1.34 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-traits 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-integer 0.1.36 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-iter 0.1.35 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "num-integer"
-version = "0.1.35"
+version = "0.1.36"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "num-traits 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "num-iter"
-version = "0.1.34"
+version = "0.1.35"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "num-integer 0.1.35 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-traits 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-integer 0.1.36 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "num-traits"
-version = "0.1.42"
+version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -117,10 +117,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "rustc_version"
-version = "0.2.1"
+version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "semver 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "semver 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -134,7 +134,7 @@ dependencies = [
 
 [[package]]
 name = "semver"
-version = "0.6.0"
+version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "semver-parser 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -159,7 +159,7 @@ name = "time"
 version = "0.1.39"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.36 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.40 (registry+https://github.com/rust-lang/crates.io-index)",
  "redox_syscall 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -171,7 +171,7 @@ source = "git+https://github.com/m-labs/dslite2svd?rev=d527f3f#d527f3febb73eb63d
 dependencies = [
  "bare-metal 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "cortex-m 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "cortex-m-rt 0.3.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cortex-m-rt 0.3.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "vcell 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -233,19 +233,19 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum byteorder 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "652805b7e73fada9d85e9a6682a4abd490cb52d96aeecc12e33a0de34dfd0d23"
 "checksum chrono 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "7c20ebe0b2b08b0aeddba49c609fe7957ba2e33449882cb186a180bc60682fa9"
 "checksum cortex-m 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "4d553ca1f23403c81e6d3d28a64ef6e8eadd7f395195aacda65cbc0dc987738e"
-"checksum cortex-m-rt 0.3.12 (registry+https://github.com/rust-lang/crates.io-index)" = "81ca9ab7573d2655a34950830c08a20f9da7772c8a2039cf5424b40e10a88cbd"
+"checksum cortex-m-rt 0.3.13 (registry+https://github.com/rust-lang/crates.io-index)" = "53c69efde430b7033dff0257ab2d899be0c66d1d60091aa6ff1eea8db0f74e44"
 "checksum kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "7507624b29483431c0ba2d82aece8ca6cdba9382bff4ddd0f7490560c056098d"
-"checksum libc 0.2.36 (registry+https://github.com/rust-lang/crates.io-index)" = "1e5d97d6708edaa407429faa671b942dc0f2727222fb6b6539bf1db936e4b121"
+"checksum libc 0.2.40 (registry+https://github.com/rust-lang/crates.io-index)" = "6fd41f331ac7c5b8ac259b8bf82c75c0fb2e469bbf37d2becbba9a6a2221965b"
 "checksum managed 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "43e2737ecabe4ae36a68061398bf27d2bfd0763f4c3c837a398478459494c4b7"
-"checksum num 0.1.41 (registry+https://github.com/rust-lang/crates.io-index)" = "cc4083e14b542ea3eb9b5f33ff48bd373a92d78687e74f4cc0a30caeb754f0ca"
-"checksum num-integer 0.1.35 (registry+https://github.com/rust-lang/crates.io-index)" = "d1452e8b06e448a07f0e6ebb0bb1d92b8890eea63288c0b627331d53514d0fba"
-"checksum num-iter 0.1.34 (registry+https://github.com/rust-lang/crates.io-index)" = "7485fcc84f85b4ecd0ea527b14189281cf27d60e583ae65ebc9c088b13dffe01"
-"checksum num-traits 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)" = "9936036cc70fe4a8b2d338ab665900323290efb03983c86cbe235ae800ad8017"
+"checksum num 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)" = "4703ad64153382334aa8db57c637364c322d3372e097840c72000dabdcf6156e"
+"checksum num-integer 0.1.36 (registry+https://github.com/rust-lang/crates.io-index)" = "f8d26da319fb45674985c78f1d1caf99aa4941f785d384a2ae36d0740bc3e2fe"
+"checksum num-iter 0.1.35 (registry+https://github.com/rust-lang/crates.io-index)" = "4b226df12c5a59b63569dd57fafb926d91b385dfce33d8074a412411b689d593"
+"checksum num-traits 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "dee092fcdf725aee04dd7da1d21debff559237d49ef1cb3e69bcb8ece44c7364"
 "checksum r0 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "e2a38df5b15c8d5c7e8654189744d8e396bddc18ad48041a500ce52d6948941f"
 "checksum redox_syscall 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)" = "0d92eecebad22b767915e4d529f89f28ee96dbbf5a4810d2b844373f136417fd"
-"checksum rustc_version 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "b9743a7670d88d5d52950408ecdb7c71d8986251ab604d4689dd2ca25c9bca69"
+"checksum rustc_version 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "a54aa04a10c68c1c4eacb4337fd883b435997ede17a9385784b990777686b09a"
 "checksum same-file 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "d931a44fdaa43b8637009e7632a02adc4f2b2e0733c08caa4cf00e8da4a117a7"
-"checksum semver 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)" = "7a3186ec9e65071a2095434b1f5bb24838d4e8e130f584c790f6033c79943537"
+"checksum semver 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "1d7eb9ef2c18661902cc47e535f9bc51b78acd254da71d375c2f6720d9a40403"
 "checksum semver-parser 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"
 "checksum smoltcp 0.4.0 (git+https://github.com/m-labs/smoltcp?rev=cb5be48)" = "<none>"
 "checksum time 0.1.39 (registry+https://github.com/rust-lang/crates.io-index)" = "a15375f1df02096fb3317256ce2cee6a1f42fc84ea5ad5fc8c421cfe40c73098"
diff --git a/firmware/Cargo.toml b/firmware/Cargo.toml
index 7eb045d..2f07fc0 100644
--- a/firmware/Cargo.toml
+++ b/firmware/Cargo.toml
@@ -7,8 +7,8 @@ authors = ["whitequark <whitequark@whitequark.org>"]
 walkdir = "1.0"
 
 [dependencies]
-cortex-m = "0.3.1"
-cortex-m-rt = { version = "0.3.5" }
+cortex-m = "0.3"
+cortex-m-rt = "0.3"
 
 [dependencies.tm4c129x]
 git = "https://github.com/m-labs/dslite2svd"