diff --git a/Cargo.lock b/Cargo.lock
index a5a7521abde13..0d7a24e123a12 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -115,9 +115,9 @@ checksum = "b671c8fb71b457dd4ae18c4ba1e59aa81793daacc361d82fcd410cef0d491875"
 
 [[package]]
 name = "backtrace"
-version = "0.3.37"
+version = "0.3.40"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5180c5a20655b14a819b652fd2378fa5f1697b6c9ddad3e695c2f9cedf6df4e2"
+checksum = "924c76597f0d9ca25d762c25a4d369d51267536465dc5064bdf0eb073ed477ea"
 dependencies = [
  "backtrace-sys",
  "cfg-if",
@@ -129,9 +129,9 @@ dependencies = [
 
 [[package]]
 name = "backtrace-sys"
-version = "0.1.30"
+version = "0.1.32"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5b3a000b9c543553af61bc01cbfc403b04b5caa9e421033866f2e98061eb3e61"
+checksum = "5d6575f128516de27e3ce99689419835fce9643a9b215a14d2b5b685be018491"
 dependencies = [
  "cc",
  "compiler_builtins",
@@ -379,9 +379,9 @@ version = "0.1.0"
 
 [[package]]
 name = "cc"
-version = "1.0.35"
+version = "1.0.46"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5e5f3fee5eeb60324c2781f1e41286bdee933850fff9b3c672587fed5ec58c83"
+checksum = "0213d356d3c4ea2c18c40b037c3be23cd639825c18f25ee670ac7813beeef99c"
 
 [[package]]
 name = "cfg-if"
diff --git a/src/librustc/Cargo.toml b/src/librustc/Cargo.toml
index cf9f36ca37c90..c3e8fbc0f212d 100644
--- a/src/librustc/Cargo.toml
+++ b/src/librustc/Cargo.toml
@@ -31,7 +31,7 @@ rustc_serialize = { path = "../libserialize", package = "serialize" }
 syntax = { path = "../libsyntax" }
 syntax_expand = { path = "../libsyntax_expand" }
 syntax_pos = { path = "../libsyntax_pos" }
-backtrace = "0.3.3"
+backtrace = "0.3.40"
 parking_lot = "0.9"
 byteorder = { version = "1.3" }
 chalk-engine = { version = "0.9.0", default-features=false }