diff --git a/Cargo.lock b/Cargo.lock
index b7c76482..e9efd6e3 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -89,9 +89,10 @@ dependencies = [
 
 [[package]]
 name = "cpp_demangle"
-version = "0.2.9"
+version = "0.2.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
+ "cfg-if 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "glob 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -482,7 +483,7 @@ dependencies = [
 name = "twiggy-ir"
 version = "0.2.0"
 dependencies = [
- "cpp_demangle 0.2.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cpp_demangle 0.2.12 (registry+https://github.com/rust-lang/crates.io-index)",
  "frozen 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "petgraph 0.4.12 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-demangle 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -662,7 +663,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum cc 1.0.18 (registry+https://github.com/rust-lang/crates.io-index)" = "2119ea4867bd2b8ed3aecab467709720b2d55b1bcfe09f772fd68066eaf15275"
 "checksum cfg-if 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "efe5c877e17a9c717a0bf3613b2709f723202c4e4675cc8f12926ded29bcb17e"
 "checksum clap 2.32.0 (registry+https://github.com/rust-lang/crates.io-index)" = "b957d88f4b6a63b9d70d5f454ac8011819c6efa7727858f458ab71c756ce2d3e"
-"checksum cpp_demangle 0.2.9 (registry+https://github.com/rust-lang/crates.io-index)" = "59f21019cf64a5de42e82a006df0a925ad5dc49b44e5a33aa5475d16f7ba0224"
+"checksum cpp_demangle 0.2.12 (registry+https://github.com/rust-lang/crates.io-index)" = "d30c0c4ba59fc4951d15cce1b9ba3b448a2b5d601964768fe7cd69c09cc69028"
 "checksum csv 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "71903184af9960c555e7f3b32ff17390d20ecaaf17d4f18c4a0993f2df8a49e3"
 "checksum csv-core 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "4dd8e6d86f7ba48b4276ef1317edc8cc36167546d8972feb4a2b5fec0b374105"
 "checksum diff 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)" = "3c2b69f912779fbb121ceb775d74d51e915af17aaebc38d28a592843a2dd0a3a"
diff --git a/ir/Cargo.toml b/ir/Cargo.toml
index df8b8282..dffb9155 100644
--- a/ir/Cargo.toml
+++ b/ir/Cargo.toml
@@ -12,7 +12,7 @@ version = "0.2.0"
 path = "./ir.rs"
 
 [dependencies]
-cpp_demangle = { version = "0.2.7", default-features = false }
+cpp_demangle = { version = "0.2.12", default-features = false }
 frozen = "1"
 petgraph = "0.4.12"
 rustc-demangle = "0.1.5"