diff --git a/.gitignore b/.gitignore
index 0ce3dcc..f7ab0d3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -11,3 +11,4 @@
 /backtrace-0.3.26.crate
 /backtrace-0.3.28.crate
 /backtrace-0.3.30.crate
+/backtrace-0.3.40.crate
diff --git a/backtrace-fix-metadata.diff b/backtrace-fix-metadata.diff
index 659eb0c..4d5cbe6 100644
--- a/backtrace-fix-metadata.diff
+++ b/backtrace-fix-metadata.diff
@@ -1,6 +1,6 @@
---- backtrace-0.3.30/Cargo.toml	1970-01-01T00:00:00+00:00
-+++ backtrace-0.3.30/Cargo.toml	2019-06-22T07:21:35.007423+00:00
-@@ -22,6 +22,7 @@
+--- backtrace-0.3.40/Cargo.toml	1970-01-01T00:00:00+00:00
++++ backtrace-0.3.40/Cargo.toml	2019-12-16T23:44:11.877017+00:00
+@@ -23,6 +23,7 @@
  readme = "README.md"
  license = "MIT/Apache-2.0"
  repository = "https://github.com/rust-lang/backtrace-rs"
@@ -8,24 +8,25 @@
  
  [[example]]
  name = "backtrace"
-@@ -94,19 +95,12 @@
- version = "0.1"
+@@ -112,12 +113,9 @@
+ optional = true
  
  [features]
 -coresymbolication = []
 -dbghelp = []
--default = ["std", "libunwind", "libbacktrace", "coresymbolication", "dladdr", "dbghelp"]
+-default = ["std", "libunwind", "libbacktrace", "dladdr", "dbghelp"]
 +default = ["std", "libunwind", "libbacktrace", "dladdr"]
  dladdr = []
- gimli-symbolize = ["addr2line", "findshlibs", "memmap"]
+ gimli-symbolize = ["addr2line", "findshlibs", "memmap", "goblin"]
 -kernel32 = []
  libbacktrace = ["backtrace-sys"]
  libunwind = []
- serialize-rustc = ["rustc-serialize"]
- serialize-serde = ["serde", "serde_derive"]
+ rustc-dep-of-std = ["backtrace-sys/rustc-dep-of-std", "cfg-if/rustc-dep-of-std", "core", "compiler_builtins", "libc/rustc-dep-of-std", "rustc-demangle/rustc-dep-of-std"]
+@@ -125,7 +123,3 @@
+ serialize-serde = ["serde"]
  std = []
  unix-backtrace = []
--verify-winapi = ["winapi/dbghelp", "winapi/handleapi", "winapi/libloaderapi", "winapi/minwindef", "winapi/processthreadsapi", "winapi/winbase", "winapi/winnt"]
+-verify-winapi = ["winapi/dbghelp", "winapi/handleapi", "winapi/libloaderapi", "winapi/minwindef", "winapi/processthreadsapi", "winapi/synchapi", "winapi/winbase", "winapi/winnt"]
 -[target."cfg(windows)".dependencies.winapi]
 -version = "0.3.3"
 -optional = true
diff --git a/rust-backtrace.spec b/rust-backtrace.spec
index c95d2f8..d942598 100644
--- a/rust-backtrace.spec
+++ b/rust-backtrace.spec
@@ -1,12 +1,12 @@
-# Generated by rust2rpm 10
+# Generated by rust2rpm 11
 %bcond_without check
 %global debug_package %{nil}
 
 %global crate backtrace
 
 Name:           rust-%{crate}
-Version:        0.3.30
-Release:        3%{?dist}
+Version:        0.3.40
+Release:        1%{?dist}
 Summary:        Library to acquire a stack trace (backtrace) at runtime in a Rust program
 
 # Upstream license specification: MIT/Apache-2.0
@@ -188,18 +188,6 @@ which use "serde" feature of "%{crate}" crate.
 %files       -n %{name}+serde-devel
 %ghost %{cargo_registry}/%{crate}-%{version}/Cargo.toml
 
-%package     -n %{name}+serde_derive-devel
-Summary:        %{summary}
-BuildArch:      noarch
-
-%description -n %{name}+serde_derive-devel %{_description}
-
-This package contains library source intended for building other packages
-which use "serde_derive" feature of "%{crate}" crate.
-
-%files       -n %{name}+serde_derive-devel
-%ghost %{cargo_registry}/%{crate}-%{version}/Cargo.toml
-
 %package     -n %{name}+serialize-rustc-devel
 Summary:        %{summary}
 BuildArch:      noarch
@@ -272,6 +260,9 @@ which use "unix-backtrace" feature of "%{crate}" crate.
 %endif
 
 %changelog
+* Mon Dec 16 2019 Josh Stone <jistone@redhat.com> - 0.3.40-1
+- Update to 0.3.40
+
 * Fri Jul 26 2019 Fedora Release Engineering <releng@fedoraproject.org> - 0.3.30-3
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild
 
diff --git a/sources b/sources
index 71108ba..f8c806e 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (backtrace-0.3.30.crate) = 73eb9cecaa8baa9da571f49ac9a1e8e159d042e59b934df4b7474e4a49ade66aea69c49505b987855942856302790065f56f25b2e25657af00afc5afaf123c20
+SHA512 (backtrace-0.3.40.crate) = 8b9da3d6c515ef7bc5b04cf4abd53221cc114c912eb5033558b1c45eb6d85e56c0fc39579711fcd26f69fa364a823945901e4c2e5560436013b7523adf267d27