diff --git a/Cargo.lock b/Cargo.lock
index 0149b6d..78fa71a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4,7 +4,7 @@ version = "0.1.0"
 dependencies = [
  "bit-set 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "byteorder 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "clippy 0.0.53 (registry+https://github.com/rust-lang/crates.io-index)",
+ "clippy 0.0.54 (registry+https://github.com/rust-lang/crates.io-index)",
  "dns-sd 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "eventual 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "getopts 0.2.14 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -14,16 +14,16 @@ dependencies = [
  "librespot-protocol 0.1.0",
  "lmdb-rs 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "num 0.1.31 (registry+https://github.com/rust-lang/crates.io-index)",
- "openssl 0.7.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "openssl 0.7.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "portaudio 0.2.0 (git+https://github.com/mvdnes/portaudio-rs)",
  "protobuf 1.0.18 (registry+https://github.com/rust-lang/crates.io-index)",
- "protobuf_macros 0.3.0 (git+https://github.com/plietar/rust-protobuf-macros)",
+ "protobuf_macros 0.3.1 (git+https://github.com/plietar/rust-protobuf-macros)",
  "rand 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
  "rpassword 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "rust-crypto 0.2.34 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-serialize 0.3.18 (registry+https://github.com/rust-lang/crates.io-index)",
  "shannon 0.1.1 (git+https://github.com/plietar/rust-shannon)",
- "syntex 0.29.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syntex 0.30.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "tempfile 2.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "time 0.1.34 (registry+https://github.com/rust-lang/crates.io-index)",
  "tremor 0.1.0 (git+https://github.com/plietar/rust-tremor)",
@@ -42,10 +42,10 @@ dependencies = [
 
 [[package]]
 name = "aster"
-version = "0.13.1"
+version = "0.14.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "syntex_syntax 0.29.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syntex_syntax 0.30.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -66,6 +66,11 @@ name = "bitflags"
 version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "bitflags"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "bitflags"
 version = "0.5.0"
@@ -88,7 +93,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "clippy"
-version = "0.0.53"
+version = "0.0.54"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "regex-syntax 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -172,7 +177,7 @@ dependencies = [
  "time 0.1.34 (registry+https://github.com/rust-lang/crates.io-index)",
  "traitobject 0.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "typeable 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "unicase 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicase 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "url 0.5.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -181,11 +186,11 @@ name = "json_macros"
 version = "0.3.0"
 source = "git+https://github.com/plietar/json_macros#f86189836f13376d104494530b25c983a33922cf"
 dependencies = [
- "quasi 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "quasi_codegen 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quasi 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quasi_codegen 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-serialize 0.3.18 (registry+https://github.com/rust-lang/crates.io-index)",
- "syntex 0.29.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "syntex_syntax 0.29.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syntex 0.30.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syntex_syntax 0.30.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -317,20 +322,20 @@ dependencies = [
 
 [[package]]
 name = "openssl"
-version = "0.7.6"
+version = "0.7.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "bitflags 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bitflags 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "gcc 0.3.25 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 0.1.15 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "openssl-sys 0.7.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "openssl-sys-extras 0.7.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "openssl-sys 0.7.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "openssl-sys-extras 0.7.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "openssl-sys"
-version = "0.7.6"
+version = "0.7.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "gdi32-sys 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -342,12 +347,12 @@ dependencies = [
 
 [[package]]
 name = "openssl-sys-extras"
-version = "0.7.6"
+version = "0.7.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "gcc 0.3.25 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "openssl-sys 0.7.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "openssl-sys 0.7.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -400,30 +405,30 @@ dependencies = [
 
 [[package]]
 name = "protobuf_macros"
-version = "0.3.0"
-source = "git+https://github.com/plietar/rust-protobuf-macros#27e273a3b335a8a6a1c0139bb67d1fe4ba765b20"
+version = "0.3.1"
+source = "git+https://github.com/plietar/rust-protobuf-macros#a3639aa7f3eff355928e93913e5a52064b322fbb"
 dependencies = [
- "aster 0.13.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "syntex 0.29.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "syntex_syntax 0.29.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "aster 0.14.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syntex 0.30.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syntex_syntax 0.30.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "quasi"
-version = "0.7.0"
+version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "syntex_syntax 0.29.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syntex_syntax 0.30.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "quasi_codegen"
-version = "0.7.0"
+version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "aster 0.13.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "syntex 0.29.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "syntex_syntax 0.29.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "aster 0.14.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syntex 0.30.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syntex_syntax 0.30.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -546,18 +551,18 @@ dependencies = [
 
 [[package]]
 name = "syntex"
-version = "0.29.0"
+version = "0.30.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "syntex_syntax 0.29.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syntex_syntax 0.30.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "syntex_syntax"
-version = "0.29.1"
+version = "0.30.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "bitflags 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bitflags 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-serialize 0.3.18 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -650,7 +655,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "unicase"
-version = "1.3.0"
+version = "1.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "rustc_version 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
diff --git a/Cargo.toml b/Cargo.toml
index e71127b..cde8f21 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -50,7 +50,7 @@ openssl         = { version = "0.7", optional = true }
 
 [build-dependencies]
 vergen          = "~0.1.0"
-syntex          = { version = "*", optional = true }
+syntex          = { version = "^0.30.0", optional = true }
 protobuf_macros = { git = "https://github.com/plietar/rust-protobuf-macros" }
 json_macros     = { git = "https://github.com/plietar/json_macros" }