diff --git a/Cargo.lock b/Cargo.lock
index eb10968..cbf4393 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,3 +1,5 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
 [[package]]
 name = "addr2line"
 version = "0.6.0"
@@ -139,7 +141,7 @@ dependencies = [
  "error-chain 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "semver 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.68 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_derive 1.0.68 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_derive 1.0.94 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_json 1.0.22 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -438,7 +440,7 @@ dependencies = [
  "error-chain 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "panic_analysis 0.1.0",
  "serde 1.0.68 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_derive 1.0.68 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_derive 1.0.94 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_json 1.0.22 (registry+https://github.com/rust-lang/crates.io-index)",
  "test_common 0.1.0",
  "toml 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -490,12 +492,12 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "serde_derive"
-version = "1.0.68"
+version = "1.0.94"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "proc-macro2 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 0.6.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 0.14.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 0.15.39 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -550,7 +552,7 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "0.14.2"
+version = "0.15.39"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "proc-macro2 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -720,14 +722,14 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum semver 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "1d7eb9ef2c18661902cc47e535f9bc51b78acd254da71d375c2f6720d9a40403"
 "checksum semver-parser 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"
 "checksum serde 1.0.68 (registry+https://github.com/rust-lang/crates.io-index)" = "429fcc4efa8a11341b5422c2ace724daba276c1748467e869478f53c0ba4562e"
-"checksum serde_derive 1.0.68 (registry+https://github.com/rust-lang/crates.io-index)" = "6a25ad0bf818ed2d180c89addbe29198d1de6c89ed08a48aa6a4d3d16a63cbfe"
+"checksum serde_derive 1.0.94 (registry+https://github.com/rust-lang/crates.io-index)" = "ef45eb79d6463b22f5f9e16d283798b7c0175ba6050bc25c1a946c122727fe7b"
 "checksum serde_json 1.0.22 (registry+https://github.com/rust-lang/crates.io-index)" = "84b8035cabe9b35878adec8ac5fe03d5f6bc97ff6edd7ccb96b44c1276ba390e"
 "checksum skeptic 0.13.3 (registry+https://github.com/rust-lang/crates.io-index)" = "c4474d6da9593171bcb086890fc344a3a12783cb24e5b141f8a5d0e43561f4b6"
 "checksum smallvec 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)" = "ee4f357e8cd37bf8822e1b964e96fd39e2cb5a0424f8aaa284ccaccc2162411c"
 "checksum smallvec 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)" = "312a7df010092e73d6bbaf141957e868d4f30efd2bfd9bb1028ad91abec58514"
 "checksum strsim 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "bb4f380125926a99e52bc279241539c018323fab05ad6368b56f93d9369ff550"
 "checksum syn 0.11.11 (registry+https://github.com/rust-lang/crates.io-index)" = "d3b891b9015c88c576343b9b3e41c2c11a51c219ef067b264bd9c8aa9b441dad"
-"checksum syn 0.14.2 (registry+https://github.com/rust-lang/crates.io-index)" = "c67da57e61ebc7b7b6fff56bb34440ca3a83db037320b0507af4c10368deda7d"
+"checksum syn 0.15.39 (registry+https://github.com/rust-lang/crates.io-index)" = "b4d960b829a55e56db167e861ddb43602c003c7be0bee1d345021703fac2fb7c"
 "checksum synom 0.11.3 (registry+https://github.com/rust-lang/crates.io-index)" = "a393066ed9010ebaed60b9eafa373d4b1baac186dd7e008555b0f702b51945b6"
 "checksum tempdir 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)" = "15f2b5fb00ccdf689e0149d1b1b3c03fead81c2b37735d812fa8bddbbf41b6d8"
 "checksum termion 1.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "689a3bdfaab439fd92bc87df5c4c78417d3cbe537487274e9b0b2dce76e92096"
diff --git a/Cargo.toml b/Cargo.toml
index 6e0eeb0..8039c62 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -28,7 +28,7 @@ callgraph = { path = "lib/callgraph", version = "0.1.0" }
 panic_analysis = { path = "lib/panic_analysis", version = "0.1.0" }
 toml = "0.4.6"
 serde = "1.0.64"
-serde_derive = "1.0.64"
+serde_derive = "1.0.94"
 error-chain = "0.12.0"
 serde_json = "1.0.22"