diff --git a/Cargo.lock b/Cargo.lock
index 90f68f9..f4fcdf0 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2,18 +2,19 @@
 # It is not intended for manual editing.
 [[package]]
 name = "aligned"
-version = "0.3.1"
+version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "as-slice 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "as-slice 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "as-slice"
-version = "0.1.0"
+version = "0.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "generic-array 0.12.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "generic-array 0.13.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "stable_deref_trait 1.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -50,7 +51,7 @@ name = "cortex-m"
 version = "0.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "aligned 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "aligned 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "bare-metal 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "volatile-register 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -70,19 +71,18 @@ name = "cortex-m-rt"
 version = "0.6.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "cortex-m-rt-macros 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cortex-m-rt-macros 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "r0 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "cortex-m-rt-macros"
-version = "0.1.6"
+version = "0.1.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "rand 0.5.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -105,7 +105,7 @@ dependencies = [
  "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "rtfm-syntax 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -145,7 +145,7 @@ name = "heapless"
 version = "0.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "as-slice 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "as-slice 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "generic-array 0.13.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "hash32 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -206,27 +206,6 @@ name = "r0"
 version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
-[[package]]
-name = "rand"
-version = "0.5.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "rand_core 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "rand_core"
-version = "0.3.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "rand_core 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "rand_core"
-version = "0.4.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
 [[package]]
 name = "rtfm-core"
 version = "0.3.0"
@@ -239,7 +218,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "indexmap 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -287,7 +266,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -336,7 +315,7 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "1.0.8"
+version = "1.0.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -368,8 +347,8 @@ dependencies = [
 ]
 
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-"checksum as-slice 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "293dac66b274fab06f95e7efb05ec439a6b70136081ea522d270bc351ae5bb27"
+"checksum aligned 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)" = "eb1ce8b3382016136ab1d31a1b5ce807144f8b7eb2d5f16b2108f0f07edceb94"
+"checksum as-slice 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "be6b7e95ac49d753f19cab5a825dea99a1149a04e4e3230b33ae16e120954c04"
 "checksum autocfg 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)" = "1d49d90015b3c36167a20fe2810c5cd875ad504b39cff3d4eae7977e6b7c1cb2"
 "checksum bare-metal 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)" = "5deb64efa5bd81e31fcd1938615a6d98c82eafcbcd787162b6f63b91d6bac5b3"
 "checksum bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "cf1de2fe8c75bc145a2f577add951f8134889b4795d47466a54a5c846d691693"
@@ -378,7 +357,7 @@ dependencies = [
 "checksum cortex-m 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)" = "145da2fc379bbd378ed425e75e1748214add9bbd800d4d5b77abb54ca423dbca"
 "checksum cortex-m-log 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)" = "978caafe65d1023d38b00c76b83564788fc351d954a5005fb72cf992c0d61458"
 "checksum cortex-m-rt 0.6.11 (registry+https://github.com/rust-lang/crates.io-index)" = "33a716cd7d8627fae3892c2eede9249e50d2d79aedfb43ca28dad9a2b23876d9"
-"checksum cortex-m-rt-macros 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)" = "2a6dc359ebb215c4924bffacfe46a8f02ef80fe2071bba1635a2ded42b40f936"
+"checksum cortex-m-rt-macros 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)" = "72b1073338d1e691b3b7aaf6bd61993e589ececce9242a02dfa5453e1b98918d"
 "checksum cortex-m-rtfm 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "eaf0b9fd3f042cb3793d15daf3cea201b2f25c99b0b5b936a551bb6909c3ae5b"
 "checksum cortex-m-rtfm-macros 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "c62092f6ff344e9b0adb748f0302ed69889ba2fae1fce446e3788d4726ea73bb"
 "checksum cortex-m-semihosting 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)" = "113ef0ecffee2b62b58f9380f4469099b30e9f9cbee2804771b4203ba1762cfa"
@@ -394,9 +373,6 @@ dependencies = [
 "checksum proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)" = "9c9e470a8dc4aeae2dee2f335e8f533e2d4b347e1434e5671afc49b054592f27"
 "checksum quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "053a8c8bcc71fcce321828dc897a98ab9760bef03a4fc36693c231e5b3216cfe"
 "checksum r0 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "e2a38df5b15c8d5c7e8654189744d8e396bddc18ad48041a500ce52d6948941f"
-"checksum rand 0.5.6 (registry+https://github.com/rust-lang/crates.io-index)" = "c618c47cd3ebd209790115ab837de41425723956ad3ce2e6a7f09890947cacb9"
-"checksum rand_core 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "7a6fdeb83b075e8266dcc8762c22776f6877a63111121f5f8c7411e5be7eed4b"
-"checksum rand_core 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)" = "9c33a3c44ca05fa6f1807d8e6743f3824e8509beca625669633be0acbdf509dc"
 "checksum rtfm-core 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "9ec893edb2aa5b70320b94896ffea22a7ebb1cf3f942bb67cd5b60a865a63493"
 "checksum rtfm-syntax 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "4455e23c34df3d66454e7e218a4d76a7f83321d04a806be614463341cec4116e"
 "checksum rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "138e3e0acb6c9fb258b19b67cb8abd63c00679d2851805ea151465464fe9030a"
@@ -408,7 +384,7 @@ dependencies = [
 "checksum smoltcp 0.5.0 (git+https://github.com/m-labs/smoltcp.git?rev=8eb01ac)" = "<none>"
 "checksum stable_deref_trait 1.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "dba1a27d3efae4351c8051072d619e3ade2820635c3958d826bfea39d59b54c8"
 "checksum stm32h7 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "6fd678579307324f1890552fe644331ce0a46607f2466aac8609f782d9b26524"
-"checksum syn 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)" = "661641ea2aa15845cddeb97dad000d22070bb5c1fb456b96c1cba883ec691e92"
+"checksum syn 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)" = "dff0acdb207ae2fe6d5976617f887eb1e35a2ba52c13c7234c790960cdad9238"
 "checksum typenum 1.11.2 (registry+https://github.com/rust-lang/crates.io-index)" = "6d2783fe2d6b8c1101136184eb41be8b1ad379e4657050b8aaff0c79ee7575f9"
 "checksum unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "826e7639553986605ec5979c7dd957c7895e93eabed50ab2ffa7f6128a75097c"
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