diff --git a/Cargo.lock b/Cargo.lock
index 4a8e551..278a19a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -72,10 +72,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8da52d66c7071e2e3fa2a1e5c6d088fec47b593032b254f5e980de8ea54454d6"
 
 [[package]]
-name = "atom"
-version = "0.3.6"
+name = "atomic_refcell"
+version = "0.1.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c9ff149ed9780025acfdb36862d35b28856bb693ceb451259a7164442f22fdc3"
+checksum = "112ef6b3f6cb3cb6fc5b6b494ef7a848492cff1ab0ef4de10b0f7d572861c905"
 
 [[package]]
 name = "autocfg"
@@ -765,11 +765,10 @@ dependencies = [
 
 [[package]]
 name = "hibitset"
-version = "0.6.3"
+version = "0.6.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "93a1bb8316a44459a7d14253c4d28dd7395cbd23cc04a68c46e851b8e46d64b1"
+checksum = "f3ede5cfa60c958e60330d65163adbc4211e15a2653ad80eb0cce878de120121"
 dependencies = [
- "atom",
  "rayon",
 ]
 
@@ -915,6 +914,22 @@ dependencies = [
  "cfg-if 1.0.0",
 ]
 
+[[package]]
+name = "macro_rules_attribute"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cf0c9b980bf4f3a37fd7b1c066941dd1b1d0152ce6ee6e8fe8c49b9f6810d862"
+dependencies = [
+ "macro_rules_attribute-proc_macro",
+ "paste",
+]
+
+[[package]]
+name = "macro_rules_attribute-proc_macro"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "58093314a45e00c77d5c508f76e77c3396afbbc0d01506e7fae47b018bac2b1d"
+
 [[package]]
 name = "malloc_buf"
 version = "0.0.6"
@@ -1117,6 +1132,27 @@ dependencies = [
  "version_check",
 ]
 
+[[package]]
+name = "nougat"
+version = "0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "97b57b9ced431322f054fc673f1d3c7fa52d80efd9df74ad2fc759f044742510"
+dependencies = [
+ "macro_rules_attribute",
+ "nougat-proc_macros",
+]
+
+[[package]]
+name = "nougat-proc_macros"
+version = "0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c84f77a45e99a2f9b492695d99e1c23844619caa5f3e57647cffacad773ca257"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 1.0.105",
+]
+
 [[package]]
 name = "num-integer"
 version = "0.1.44"
@@ -1257,6 +1293,12 @@ dependencies = [
  "winapi 0.3.9",
 ]
 
+[[package]]
+name = "paste"
+version = "1.0.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "de3145af08024dea9fa9914f381a17b8fc6034dfb00f3a84013f7ff43f29ed4c"
+
 [[package]]
 name = "percent-encoding"
 version = "2.1.0"
@@ -1559,12 +1601,13 @@ dependencies = [
 
 [[package]]
 name = "shred"
-version = "0.14.1"
+version = "0.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d6aa4148ce950f367ede79bff6bb04bbf3c31317a1291315078ef60c080821a1"
+checksum = "dc6b2cd1ccb08cf2b25d75c936e0cc9c8cb93c39a83814956da32653236338c0"
 dependencies = [
  "ahash",
  "arrayvec",
+ "atomic_refcell",
  "rayon",
  "smallvec",
  "tynm",
@@ -1618,14 +1661,15 @@ dependencies = [
 
 [[package]]
 name = "specs"
-version = "0.19.0"
+version = "0.20.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ad2e89cb8aba27bebf48a5a47b4889e7b317a08884d92cc36109d58992d41325"
+checksum = "a60eabdfd5a80e458c3e7bcc9f1076d6ce3cc8ddb71d69691f00fc0de735a635"
 dependencies = [
  "ahash",
  "crossbeam-queue",
  "hibitset",
  "log",
+ "nougat",
  "rayon",
  "serde",
  "shred",
diff --git a/Cargo.toml b/Cargo.toml
index 04057dd..af07491 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -7,7 +7,7 @@ edition = "2021"
 
 [dependencies]
 rltk = { version = "0.8.7", features = ["serde"] }
-specs = { version = "0.19.0", features = ["serde"] }
+specs = { version = "0.20.0", features = ["serde"] }
 specs-derive = { version = "0.4.1" }
 serde = { version = "^1.0.188", features = ["derive"] }
 serde_json = "1.0.107"