diff --git a/Cargo.lock b/Cargo.lock
index 42139640..50193e99 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -87,7 +87,7 @@ dependencies = [
  "log 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "peeking_take_while 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)",
- "regex 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "which 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -155,11 +155,11 @@ dependencies = [
 
 [[package]]
 name = "cargo-dinghy"
-version = "0.3.0-pre"
+version = "0.3.1-pre"
 dependencies = [
  "cargo 0.24.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "clap 2.31.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "dinghy-lib 0.3.0-pre",
+ "dinghy-lib 0.3.1-pre",
  "error-chain 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "itertools 0.7.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -340,7 +340,7 @@ dependencies = [
 
 [[package]]
 name = "dinghy-build"
-version = "0.3.0-pre"
+version = "0.3.1-pre"
 dependencies = [
  "bindgen 0.33.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "error-chain 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -350,13 +350,13 @@ dependencies = [
 
 [[package]]
 name = "dinghy-lib"
-version = "0.3.0-pre"
+version = "0.3.1-pre"
 dependencies = [
  "cargo 0.24.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "clap 2.31.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "core-foundation 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "core-foundation-sys 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "dinghy-build 0.3.0-pre",
+ "dinghy-build 0.3.1-pre",
  "error-chain 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "filetime 0.1.15 (registry+https://github.com/rust-lang/crates.io-index)",
  "ignore 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -367,7 +367,7 @@ dependencies = [
  "log 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "plist 0.2.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "pretty_env_logger 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "regex 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.29 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 1.0.29 (registry+https://github.com/rust-lang/crates.io-index)",
  "shell-escape 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -379,7 +379,7 @@ dependencies = [
 
 [[package]]
 name = "dinghy-test"
-version = "0.3.0-pre"
+version = "0.3.1-pre"
 
 [[package]]
 name = "docopt"
@@ -387,7 +387,7 @@ version = "0.8.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "regex 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.29 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 1.0.29 (registry+https://github.com/rust-lang/crates.io-index)",
  "strsim 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -409,7 +409,7 @@ version = "0.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "log 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
- "regex 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -420,7 +420,7 @@ dependencies = [
  "atty 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "humantime 1.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "regex 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "termcolor 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -535,7 +535,7 @@ dependencies = [
  "fnv 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
  "memchr 2.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "regex 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -547,7 +547,7 @@ dependencies = [
  "fnv 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "memchr 2.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "regex 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -600,7 +600,7 @@ dependencies = [
  "lazy_static 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
  "memchr 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "regex 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "thread_local 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "walkdir 1.0.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -615,7 +615,7 @@ dependencies = [
  "lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "memchr 2.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "regex 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "same-file 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "thread_local 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "walkdir 2.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -983,19 +983,19 @@ dependencies = [
 
 [[package]]
 name = "regex"
-version = "0.2.7"
+version = "0.2.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "aho-corasick 0.6.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "memchr 2.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "regex-syntax 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex-syntax 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "thread_local 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "utf8-ranges 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "regex-syntax"
-version = "0.5.0"
+version = "0.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "ucd-util 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1482,8 +1482,8 @@ dependencies = [
 "checksum rand 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)" = "eba5f8cb59cc50ed56be8880a5c7b496bfd9bd26394e176bc67884094145c2c5"
 "checksum redox_syscall 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)" = "0d92eecebad22b767915e4d529f89f28ee96dbbf5a4810d2b844373f136417fd"
 "checksum redox_termios 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "7e891cfe48e9100a70a3b6eb652fef28920c117d366339687bd5576160db0f76"
-"checksum regex 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)" = "a62bf8bb734ab90b7f234b681b01af396e5d39b028906c210dc04fa1d5e9e5b3"
-"checksum regex-syntax 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "48d7391e7e90e06eaf3aefbe4652464153ecfec64806f3bf77ffc59638a63e77"
+"checksum regex 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)" = "0a33e44e4f5dbeb5619910f68b874d85b01e15f86fa7bb0fbc41bbd148883a48"
+"checksum regex-syntax 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "de8dbb6ebf56b0af749f4104a074e67b5538b16c659ca6cfaae778cc92fa9ea6"
 "checksum remove_dir_all 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "b5d2f806b0fcdabd98acd380dc8daef485e22bcb7cddc811d1337967f2528cf5"
 "checksum rustc-demangle 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)" = "11fb43a206a04116ffd7cfcf9bcb941f8eb6cc7ff667272246b0a1c74259a3cb"
 "checksum safemem 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "e27a8b19b835f7aea908818e871f5cc3a5a186550c30773be987e155e8163d8f"
diff --git a/post-release.sh b/post-release.sh
index d3654d12..5d76e51c 100755
--- a/post-release.sh
+++ b/post-release.sh
@@ -24,4 +24,6 @@ do
     set_version $c/Cargo.toml $VERSION
 done
 
+(cd cargo-dinghy ; cargo update)
+
 git commit . -m "post-release $VERSION"