diff --git a/Cargo.lock b/Cargo.lock
index 7b55c87e..e120902c 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -8,6 +8,14 @@ dependencies = [
  "nodrop 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "array-init"
+version = "0.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "nodrop 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "bit_field"
 version = "0.9.0"
@@ -23,7 +31,7 @@ name = "blog_os"
 version = "0.1.0"
 dependencies = [
  "array-init 0.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "bootloader 0.3.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bootloader 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "spin 0.4.10 (registry+https://github.com/rust-lang/crates.io-index)",
  "volatile 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -31,13 +39,13 @@ dependencies = [
 
 [[package]]
 name = "bootloader"
-version = "0.3.12"
+version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "fixedvec 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "font8x8 0.2.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "usize_conversions 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "x86_64 0.2.14 (registry+https://github.com/rust-lang/crates.io-index)",
+ "x86_64 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "xmas-elf 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -212,9 +220,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "x86_64"
-version = "0.2.14"
+version = "0.3.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
+ "array-init 0.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "bit_field 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "bitflags 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "os_bootinfo 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -237,9 +246,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [metadata]
 "checksum array-init 0.0.3 (registry+https://github.com/rust-lang/crates.io-index)" = "c3cc8456d0ae81a8c76f59e384683a601548c38949a4bfcb65dd31ded5c75ff3"
+"checksum array-init 0.0.4 (registry+https://github.com/rust-lang/crates.io-index)" = "23589ecb866b460d3a0f1278834750268c607e8e28a1b982c907219f3178cd72"
 "checksum bit_field 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ed8765909f9009617974ab6b7d332625b320b33c326b1e9321382ef1999b5d56"
 "checksum bitflags 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)" = "228047a76f468627ca71776ecdebd732a3423081fcf5125585bcd7c49886ce12"
-"checksum bootloader 0.3.12 (registry+https://github.com/rust-lang/crates.io-index)" = "2b498d7168288f3667f80aee93b4894e355dfce867803e1ccd5d9ee42a0b0e1a"
+"checksum bootloader 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "a0808c55da932b82d3ababdaa0caa3f18522c5d2d06309b98f73adda849a3f03"
 "checksum fixedvec 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "7c6c16d316ccdac21a4dd648e314e76facbbaf316e83ca137d0857a9c07419d0"
 "checksum font8x8 0.2.4 (registry+https://github.com/rust-lang/crates.io-index)" = "b81d84c3c978af7d05d31a2198af4b9ba956d819d15d8f6d58fc150e33f8dc1f"
 "checksum fuchsia-zircon 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "2e9763c69ebaae630ba35f74888db465e49e259ba1bc0eda7d06f4a067615d82"
@@ -265,6 +275,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)" = "92c1eb33641e276cfa214a0522acad57be5c56b10cb348b3c5117db75f3ac4b0"
 "checksum winapi-i686-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
 "checksum winapi-x86_64-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
-"checksum x86_64 0.2.14 (registry+https://github.com/rust-lang/crates.io-index)" = "2bd647af1614659e1febec1d681231aea4ebda4818bf55a578aff02f3e4db4b4"
+"checksum x86_64 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)" = "f9258d7e2dd25008d69e8c9e9ee37865887a5e1e3d06a62f1cb3f6c209e6f177"
 "checksum xmas-elf 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)" = "22678df5df766e8d1e5d609da69f0c3132d794edf6ab5e75e7abcd2270d4cf58"
 "checksum zero 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "5f1bc8a6b2005884962297587045002d8cfb8dcec9db332f4ca216ddc5de82c5"
diff --git a/Cargo.toml b/Cargo.toml
index 0186af40..49d7dd62 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -5,7 +5,7 @@ authors = ["Philipp Oppermann <dev@phil-opp.com>"]
 edition = "2018"
 
 [dependencies]
-bootloader = "0.3.12"
+bootloader = "0.4.0"
 volatile = "0.2.3"
 spin = "0.4.9"