diff --git a/native/rhai_rustler/Cargo.lock b/native/rhai_rustler/Cargo.lock
index a9d8af4..4badca4 100644
--- a/native/rhai_rustler/Cargo.lock
+++ b/native/rhai_rustler/Cargo.lock
@@ -108,6 +108,15 @@ dependencies = [
  "windows-targets",
 ]
 
+[[package]]
+name = "no-std-compat"
+version = "0.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b93853da6d84c2e3c7d730d6473e8817692dd89be387eb01b94d7f108ecb5b8c"
+dependencies = [
+ "spin",
+]
+
 [[package]]
 name = "num-traits"
 version = "0.2.19"
@@ -122,6 +131,15 @@ name = "once_cell"
 version = "1.20.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1261fe7e33c73b354eab43b1273a57c8f967d0391e80353e51f764ac02cf6775"
+dependencies = [
+ "portable-atomic",
+]
+
+[[package]]
+name = "portable-atomic"
+version = "1.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cc9c68a3f6da06753e9335d63e27f6b9754dd1920d941135b7ea8224f141adb2"
 
 [[package]]
 name = "proc-macro2"
@@ -149,13 +167,14 @@ checksum = "53a49587ad06b26609c52e423de037e7f57f20d53535d66e08c695f347df952a"
 
 [[package]]
 name = "rhai"
-version = "1.19.0"
+version = "1.20.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "61797318be89b1a268a018a92a7657096d83f3ecb31418b9e9c16dcbb043b702"
+checksum = "8867cfc57aaf2320b60ec0f4d55603ac950ce852e6ab6b9109aa3d626a4dd7ea"
 dependencies = [
  "ahash",
  "bitflags",
  "instant",
+ "no-std-compat",
  "num-traits",
  "once_cell",
  "rhai_codegen",
@@ -237,6 +256,12 @@ dependencies = [
  "version_check",
 ]
 
+[[package]]
+name = "spin"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6e63cff320ae2c57904679ba7cb63280a3dc4613885beafb148ee7bf9aa9042d"
+
 [[package]]
 name = "static_assertions"
 version = "1.1.0"
diff --git a/native/rhai_rustler/Cargo.toml b/native/rhai_rustler/Cargo.toml
index d882c7b..c04ed3d 100644
--- a/native/rhai_rustler/Cargo.toml
+++ b/native/rhai_rustler/Cargo.toml
@@ -10,7 +10,7 @@ path = "src/lib.rs"
 crate-type = ["cdylib"]
 
 [dependencies]
-rhai = { version = "=1.19.0", features = ["sync"] }
+rhai = { version = "=1.20.0", features = ["sync"] }
 rhai-dylib = { version = "0.4.0", features = ["sync"] }
 thiserror = "1.0.65"
 rustler = "0.35.0"