diff --git a/Cargo.lock b/Cargo.lock
index b0be7d1..6953bce 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -73,7 +73,7 @@ dependencies = [
  "bitflags 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "embedded-hal 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "env_logger 0.5.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "i2cdev 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "i2cdev 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "influent 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "linux-embedded-hal 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -226,6 +226,18 @@ dependencies = [
  "skeptic 0.13.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "i2cdev"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "bitflags 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.40 (registry+https://github.com/rust-lang/crates.io-index)",
+ "nix 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "skeptic 0.13.3 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "idna"
 version = "0.1.4"
@@ -749,6 +761,7 @@ dependencies = [
 "checksum humantime 1.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "0484fda3e7007f2a4a0d9c3a703ca38c71c54c55602ce4660c419fd32e188c9e"
 "checksum hyper 0.10.13 (registry+https://github.com/rust-lang/crates.io-index)" = "368cb56b2740ebf4230520e2b90ebb0461e69034d85d1945febd9b3971426db2"
 "checksum i2cdev 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)" = "3c10164c76056ea2af0beb6a3f76ed9fb1b941716a53b4319242090d7f26368e"
+"checksum i2cdev 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "07f51d8c8c46dffec8bb96ab452e340d4f8aad42e985aa9303472811230bad29"
 "checksum idna 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "014b298351066f1512874135335d62a789ffe78a9974f94b43ed5621951eaf7d"
 "checksum influent 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)" = "9bc265d6f1f53ae16fd3c18cc737c8c91ec1381afc6a15bee35fecd16a83070e"
 "checksum iovec 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "dbe6e417e7d0975db6512b90796e8ce223145ac4e33c377e4a42882a0e88bb08"
diff --git a/Cargo.toml b/Cargo.toml
index 38fb78b..13bf53a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -14,6 +14,6 @@ log = "0.4"
 
 [dev-dependencies]
 env_logger = "0.5"
-i2cdev = "0.3"
+i2cdev = "0.4"
 influent = "0.4"
 linux-embedded-hal = "0.2"