diff --git a/sim/Cargo.lock b/sim/Cargo.lock
index 066f925..96aae33 100644
--- a/sim/Cargo.lock
+++ b/sim/Cargo.lock
@@ -56,7 +56,7 @@
 version = "0.1.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "cc 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc 1.0.25 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.34 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -99,7 +99,6 @@
  "base64 0.9.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "docopt 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "env_logger 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "gcc 0.3.54 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.34 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "mcuboot-sys 0.1.0",
@@ -124,7 +123,7 @@
 
 [[package]]
 name = "cc"
-version = "1.0.3"
+version = "1.0.25"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -263,7 +262,7 @@
 name = "mcuboot-sys"
 version = "0.1.0"
 dependencies = [
- "gcc 0.3.54 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc 1.0.25 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.34 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -509,7 +508,7 @@
 "checksum block-cipher-trait 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)" = "370424437b9459f3dfd68428ed9376ddfe03d8b70ede29cc533b3557df186ab4"
 "checksum byte-tools 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "560c32574a12a89ecd91f5e742165893f86e3ab98d21f8ea548658eb9eef5f40"
 "checksum byteorder 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "652805b7e73fada9d85e9a6682a4abd490cb52d96aeecc12e33a0de34dfd0d23"
-"checksum cc 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)" = "a9b13a57efd6b30ecd6598ebdb302cca617930b5470647570468a65d12ef9719"
+"checksum cc 1.0.25 (registry+https://github.com/rust-lang/crates.io-index)" = "f159dfd43363c4d08055a07703eb7a3406b0dac4d0584d96965a3262db3c9d16"
 "checksum cfg-if 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "d4c819a1287eb618df47cc647173c5c4c66ba19d888a6e50d605672aed3140de"
 "checksum coco 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "c06169f5beb7e31c7c67ebf5540b8b472d23e3eade3b2ec7d1f5b504a85f91bd"
 "checksum ctr 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "50ac3add446ec1f8fe3dc007cd838f5b22bbf33186394feac505451ecc43c018"
diff --git a/sim/Cargo.toml b/sim/Cargo.toml
index 84fbabe..fe3087e 100644
--- a/sim/Cargo.toml
+++ b/sim/Cargo.toml
@@ -13,9 +13,6 @@
 enc-rsa = ["mcuboot-sys/enc-rsa"]
 enc-kw = ["mcuboot-sys/enc-kw"]
 
-[build-dependencies]
-gcc = "0.3.54"
-
 [dependencies]
 libc = "0.2.0"
 rand = "0.3.0"
diff --git a/sim/mcuboot-sys/Cargo.toml b/sim/mcuboot-sys/Cargo.toml
index 25d5652..09b323b 100644
--- a/sim/mcuboot-sys/Cargo.toml
+++ b/sim/mcuboot-sys/Cargo.toml
@@ -30,7 +30,7 @@
 enc-kw = []
 
 [build-dependencies]
-gcc = "0.3.54"
+cc = "1.0.25"
 
 [dependencies]
 lazy_static = "1.0"
diff --git a/sim/mcuboot-sys/build.rs b/sim/mcuboot-sys/build.rs
index 58b6569..4f98c71 100644
--- a/sim/mcuboot-sys/build.rs
+++ b/sim/mcuboot-sys/build.rs
@@ -1,6 +1,6 @@
 // Build mcuboot as a library, based on the requested features.
 
-extern crate gcc;
+extern crate cc;
 
 use std::env;
 use std::fs;
@@ -16,7 +16,7 @@
     let enc_rsa = env::var("CARGO_FEATURE_ENC_RSA").is_ok();
     let enc_kw = env::var("CARGO_FEATURE_ENC_KW").is_ok();
 
-    let mut conf = gcc::Build::new();
+    let mut conf = cc::Build::new();
     conf.define("__BOOTSIM__", None);
     conf.define("MCUBOOT_USE_FLASH_AREA_GET_SECTORS", None);
     conf.define("MCUBOOT_HAVE_ASSERT_H", None);