diff --git a/Cargo.lock b/Cargo.lock
index 60a31b5db..c22e45fc6 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -424,7 +424,7 @@ version = "0.1.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "quote 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 1.0.22 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.23 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -456,7 +456,7 @@ dependencies = [
  "proc-macro2 1.0.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "strsim 0.9.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 1.0.22 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.23 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -466,7 +466,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "darling_core 0.10.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 1.0.22 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.23 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -485,7 +485,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "proc-macro2 1.0.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 1.0.22 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.23 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -538,7 +538,7 @@ dependencies = [
  "darling 0.10.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "proc-macro2 1.0.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 1.0.22 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.23 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -674,7 +674,7 @@ dependencies = [
  "proc-macro-hack 0.5.15 (registry+https://github.com/rust-lang/crates.io-index)",
  "proc-macro2 1.0.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 1.0.22 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.23 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -732,7 +732,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "proc-macro2 1.0.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 1.0.22 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.23 (registry+https://github.com/rust-lang/crates.io-index)",
  "synstructure 0.12.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -1357,7 +1357,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "proc-macro2 1.0.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 1.0.22 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.23 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1432,7 +1432,7 @@ dependencies = [
  "proc-macro-crate 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "proc-macro2 1.0.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 1.0.22 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.23 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1443,7 +1443,7 @@ dependencies = [
  "proc-macro-crate 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "proc-macro2 1.0.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 1.0.22 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.23 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1531,7 +1531,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "proc-macro2 1.0.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 1.0.22 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.23 (registry+https://github.com/rust-lang/crates.io-index)",
  "synstructure 0.12.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -1561,7 +1561,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "proc-macro2 1.0.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 1.0.22 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.23 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1617,7 +1617,7 @@ dependencies = [
  "proc-macro-error-attr 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "proc-macro2 1.0.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 1.0.22 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.23 (registry+https://github.com/rust-lang/crates.io-index)",
  "version_check 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -1628,7 +1628,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "proc-macro2 1.0.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 1.0.22 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.23 (registry+https://github.com/rust-lang/crates.io-index)",
  "syn-mid 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "version_check 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -1868,7 +1868,7 @@ name = "ruffle_macros"
 version = "0.1.0"
 dependencies = [
  "quote 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 1.0.22 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.23 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -2049,7 +2049,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "proc-macro2 1.0.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 1.0.22 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.23 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -2160,7 +2160,7 @@ dependencies = [
  "proc-macro-error 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "proc-macro2 1.0.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 1.0.22 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.23 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -2184,7 +2184,7 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "1.0.22"
+version = "1.0.23"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "proc-macro2 1.0.13 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2199,7 +2199,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "proc-macro2 1.0.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 1.0.22 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.23 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -2209,7 +2209,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "proc-macro2 1.0.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 1.0.22 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.23 (registry+https://github.com/rust-lang/crates.io-index)",
  "unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -2261,7 +2261,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "proc-macro2 1.0.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 1.0.22 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.23 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -2385,7 +2385,7 @@ dependencies = [
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "proc-macro2 1.0.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 1.0.22 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.23 (registry+https://github.com/rust-lang/crates.io-index)",
  "wasm-bindgen-shared 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -2416,7 +2416,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "proc-macro2 1.0.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 1.0.22 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.23 (registry+https://github.com/rust-lang/crates.io-index)",
  "wasm-bindgen-backend 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
  "wasm-bindgen-shared 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -2949,7 +2949,7 @@ dependencies = [
 "checksum structopt 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)" = "863246aaf5ddd0d6928dfeb1a9ca65f505599e4e1b399935ef7e75107516b4ef"
 "checksum structopt-derive 0.4.7 (registry+https://github.com/rust-lang/crates.io-index)" = "d239ca4b13aee7a2142e6795cbd69e457665ff8037aed33b3effdc430d2f927a"
 "checksum svg 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)" = "0b65a64d32a41db2a8081aa03c1ccca26f246ff681add693f8b01307b137da79"
-"checksum syn 1.0.22 (registry+https://github.com/rust-lang/crates.io-index)" = "1425de3c33b0941002740a420b1a906a350b88d08b82b2c8a01035a3f9447bac"
+"checksum syn 1.0.23 (registry+https://github.com/rust-lang/crates.io-index)" = "95b5f192649e48a5302a13f2feb224df883b98933222369e4b3b0fe2a5447269"
 "checksum syn-mid 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "7be3539f6c128a931cf19dcee741c1af532c7fd387baa739c03dd2e96479338a"
 "checksum synstructure 0.12.3 (registry+https://github.com/rust-lang/crates.io-index)" = "67656ea1dc1b41b1451851562ea232ec2e5a80242139f7e679ceccfb5d61f545"
 "checksum termcolor 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "bb6bfa289a4d7c5766392812c0a1f4c1ba45afa1ad47803c11e1f407d846d75f"
diff --git a/core/macros/Cargo.toml b/core/macros/Cargo.toml
index fc2bdc94a..24518bf09 100644
--- a/core/macros/Cargo.toml
+++ b/core/macros/Cargo.toml
@@ -11,5 +11,5 @@ proc-macro = true
 quote = "1.0.6"
 
 [dependencies.syn]
-version = "1.0.22"
+version = "1.0.23"
 features = ["full"]
\ No newline at end of file