diff --git a/extra/cbindgen/checksums b/extra/cbindgen/checksums
index aefc4c4e..64e89719 100644
--- a/extra/cbindgen/checksums
+++ b/extra/cbindgen/checksums
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diff --git a/extra/cbindgen/sources b/extra/cbindgen/sources
index 43c5675e..4c84763a 100644
--- a/extra/cbindgen/sources
+++ b/extra/cbindgen/sources
@@ -1,43 +1,48 @@
-https://github.com/eqrion/cbindgen/archive/v0.14.6.tar.gz
+https://github.com/eqrion/cbindgen/archive/v0.15.0.tar.gz
 
 # This is a pre-generated list of crate dependencies from the
 # "kiss-cargo-urlgen" utility. This allows us to pre-cache
 # each of the required dependencies and avoid the network
 # requirement during build.
 https://static.crates.io/crates/ansi_term/ansi_term-0.11.0.crate vendor
-https://static.crates.io/crates/atty/atty-0.2.13.crate vendor
+https://static.crates.io/crates/atty/atty-0.2.14.crate vendor
+https://static.crates.io/crates/autocfg/autocfg-1.0.1.crate vendor
 https://static.crates.io/crates/bitflags/bitflags-1.2.1.crate vendor
 https://static.crates.io/crates/c2-chacha/c2-chacha-0.2.3.crate vendor
 https://static.crates.io/crates/cfg-if/cfg-if-0.1.10.crate vendor
-https://static.crates.io/crates/clap/clap-2.33.0.crate vendor
-https://static.crates.io/crates/getrandom/getrandom-0.1.13.crate vendor
+https://static.crates.io/crates/clap/clap-2.33.3.crate vendor
+https://static.crates.io/crates/getrandom/getrandom-0.1.15.crate vendor
+https://static.crates.io/crates/hashbrown/hashbrown-0.9.1.crate vendor
 https://static.crates.io/crates/heck/heck-0.3.1.crate vendor
-https://static.crates.io/crates/itoa/itoa-0.4.4.crate vendor
-https://static.crates.io/crates/libc/libc-0.2.66.crate vendor
-https://static.crates.io/crates/log/log-0.4.8.crate vendor
-https://static.crates.io/crates/ppv-lite86/ppv-lite86-0.2.6.crate vendor
-https://static.crates.io/crates/proc-macro2/proc-macro2-1.0.6.crate vendor
-https://static.crates.io/crates/quote/quote-1.0.2.crate vendor
-https://static.crates.io/crates/rand/rand-0.7.2.crate vendor
-https://static.crates.io/crates/rand_chacha/rand_chacha-0.2.1.crate vendor
+https://static.crates.io/crates/hermit-abi/hermit-abi-0.1.16.crate vendor
+https://static.crates.io/crates/itoa/itoa-0.4.6.crate vendor
+https://static.crates.io/crates/indexmap/indexmap-1.6.0.crate vendor
+https://static.crates.io/crates/libc/libc-0.2.77.crate vendor
+https://static.crates.io/crates/log/log-0.4.11.crate vendor
+https://static.crates.io/crates/ppv-lite86/ppv-lite86-0.2.9.crate vendor
+https://static.crates.io/crates/proc-macro2/proc-macro2-1.0.7.crate vendor
+https://static.crates.io/crates/proc-macro2/proc-macro2-1.0.21.crate vendor
+https://static.crates.io/crates/quote/quote-1.0.7.crate vendor
+https://static.crates.io/crates/rand/rand-0.7.3.crate vendor
+https://static.crates.io/crates/rand_chacha/rand_chacha-0.2.2.crate vendor
 https://static.crates.io/crates/rand_core/rand_core-0.5.1.crate vendor
 https://static.crates.io/crates/rand_hc/rand_hc-0.2.0.crate vendor
-https://static.crates.io/crates/redox_syscall/redox_syscall-0.1.56.crate vendor
-https://static.crates.io/crates/remove_dir_all/remove_dir_all-0.5.2.crate vendor
-https://static.crates.io/crates/ryu/ryu-1.0.2.crate vendor
-https://static.crates.io/crates/serde/serde-1.0.104.crate vendor
-https://static.crates.io/crates/serde_derive/serde_derive-1.0.104.crate vendor
-https://static.crates.io/crates/serde_json/serde_json-1.0.44.crate vendor
+https://static.crates.io/crates/redox_syscall/redox_syscall-0.1.57.crate vendor
+https://static.crates.io/crates/remove_dir_all/remove_dir_all-0.5.3.crate vendor
+https://static.crates.io/crates/ryu/ryu-1.0.5.crate vendor
+https://static.crates.io/crates/serde/serde-1.0.116.crate vendor
+https://static.crates.io/crates/serde_derive/serde_derive-1.0.116.crate vendor
+https://static.crates.io/crates/serde_json/serde_json-1.0.57.crate vendor
 https://static.crates.io/crates/strsim/strsim-0.8.0.crate vendor
-https://static.crates.io/crates/syn/syn-1.0.11.crate vendor
+https://static.crates.io/crates/syn/syn-1.0.41.crate vendor
 https://static.crates.io/crates/tempfile/tempfile-3.1.0.crate vendor
 https://static.crates.io/crates/textwrap/textwrap-0.11.0.crate vendor
-https://static.crates.io/crates/toml/toml-0.5.5.crate vendor
+https://static.crates.io/crates/toml/toml-0.5.6.crate vendor
 https://static.crates.io/crates/unicode-segmentation/unicode-segmentation-1.6.0.crate vendor
-https://static.crates.io/crates/unicode-width/unicode-width-0.1.7.crate vendor
-https://static.crates.io/crates/unicode-xid/unicode-xid-0.2.0.crate vendor
-https://static.crates.io/crates/vec_map/vec_map-0.8.1.crate vendor
-https://static.crates.io/crates/wasi/wasi-0.7.0.crate vendor
-https://static.crates.io/crates/winapi/winapi-0.3.8.crate vendor
+https://static.crates.io/crates/unicode-width/unicode-width-0.1.8.crate vendor
+https://static.crates.io/crates/unicode-xid/unicode-xid-0.2.1.crate vendor
+https://static.crates.io/crates/vec_map/vec_map-0.8.2.crate vendor
+https://static.crates.io/crates/wasi/wasi-0.9.0+wasi-snapshot-preview1.crate vendor
+https://static.crates.io/crates/winapi/winapi-0.3.9.crate vendor
 https://static.crates.io/crates/winapi-i686-pc-windows-gnu/winapi-i686-pc-windows-gnu-0.4.0.crate vendor
 https://static.crates.io/crates/winapi-x86_64-pc-windows-gnu/winapi-x86_64-pc-windows-gnu-0.4.0.crate vendor
diff --git a/extra/cbindgen/version b/extra/cbindgen/version
index fa95ed63..cd62e2ea 100644
--- a/extra/cbindgen/version
+++ b/extra/cbindgen/version
@@ -1 +1 @@
-0.14.6 1
+0.15.0 1