diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e3c7e1e..b0c5d95 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -47,7 +47,7 @@ jobs:
     strategy:
       matrix:
         target:
-          - wasm32-wasi
+          - wasm32-wasip1
           - thumbv6m-none-eabi
           - thumbv7em-none-eabihf
     steps:
diff --git a/Cargo.lock b/Cargo.lock
index 1c95337..b79f59a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,6 +1,6 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
-version = 3
+version = 4
 
 [[package]]
 name = "addchain"
@@ -72,12 +72,32 @@ version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
+[[package]]
+name = "chacha20"
+version = "0.10.0-rc.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3585020fc6766ef7ff5c58d69819dbca16a19008ae347bb5d3e4e145c495eb38"
+dependencies = [
+ "cfg-if",
+ "cpufeatures",
+ "rand_core",
+]
+
 [[package]]
 name = "constant_time_eq"
 version = "0.2.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "21a53c0a4d288377e7415b53dcfc3c04da5cdc2cc95c8d5ac178b58f0b861ad6"
 
+[[package]]
+name = "cpufeatures"
+version = "0.2.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "59ed5838eebb26a2bb2e58f6d5b5316989ae9d08bab10e0e6d103e656d1b0280"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "funty"
 version = "2.0.0"
@@ -131,15 +151,6 @@ dependencies = [
  "autocfg",
 ]
 
-[[package]]
-name = "ppv-lite86"
-version = "0.2.20"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "77957b295656769bb8ad2b6a6b09d897d94f05c41b069aede1fcdaa675eaea04"
-dependencies = [
- "zerocopy 0.7.35",
-]
-
 [[package]]
 name = "proc-macro2"
 version = "1.0.94"
@@ -166,33 +177,20 @@ checksum = "dc33ff2d4973d518d823d61aa239014831e521c75da58e3df4840d3f47749d09"
 
 [[package]]
 name = "rand"
-version = "0.9.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3779b94aeb87e8bd4e834cee3650289ee9e0d5677f976ecdb6d219e5f4f6cd94"
-dependencies = [
- "rand_chacha",
- "rand_core",
- "zerocopy 0.8.23",
-]
-
-[[package]]
-name = "rand_chacha"
-version = "0.9.0"
+version = "0.10.0-rc.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d3022b5f1df60f26e1ffddd6c66e8aa15de382ae63b3a0c1bfc0e4d3e3f325cb"
+checksum = "9e7d245ced4538f0406b1579d3d4a6515a2ff1bdf20733492e2e4fc90a648769"
 dependencies = [
- "ppv-lite86",
+ "chacha20",
+ "getrandom",
  "rand_core",
 ]
 
 [[package]]
 name = "rand_core"
-version = "0.9.3"
+version = "0.10.0-rc-2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "99d9a13982dcf210057a8a78572b2217b667c3beacbf3a0d8b454f6f82837d38"
-dependencies = [
- "getrandom",
-]
+checksum = "104a23e4e8b77312a823b6b5613edbac78397e2f34320bc7ac4277013ec4478e"
 
 [[package]]
 name = "rustcrypto-ff"
@@ -217,7 +215,7 @@ dependencies = [
  "num-traits",
  "proc-macro2",
  "quote",
- "syn 1.0.109",
+ "syn",
 ]
 
 [[package]]
@@ -237,17 +235,6 @@ dependencies = [
  "unicode-ident",
 ]
 
-[[package]]
-name = "syn"
-version = "2.0.99"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e02e925281e18ffd9d640e234264753c43edc62d64b2d4cf898f1bc5e75f3fc2"
-dependencies = [
- "proc-macro2",
- "quote",
- "unicode-ident",
-]
-
 [[package]]
 name = "tap"
 version = "1.0.1"
@@ -350,44 +337,3 @@ checksum = "05f360fc0b24296329c78fda852a1e9ae82de9cf7b27dae4b7f62f118f77b9ed"
 dependencies = [
  "tap",
 ]
-
-[[package]]
-name = "zerocopy"
-version = "0.7.35"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1b9b4fd18abc82b8136838da5d50bae7bdea537c574d8dc1a34ed098d6c166f0"
-dependencies = [
- "byteorder",
- "zerocopy-derive 0.7.35",
-]
-
-[[package]]
-name = "zerocopy"
-version = "0.8.23"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fd97444d05a4328b90e75e503a34bad781f14e28a823ad3557f0750df1ebcbc6"
-dependencies = [
- "zerocopy-derive 0.8.23",
-]
-
-[[package]]
-name = "zerocopy-derive"
-version = "0.7.35"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fa4f8080344d4671fb4e831a13ad1e68092748387dfc4f55e356242fae12ce3e"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn 2.0.99",
-]
-
-[[package]]
-name = "zerocopy-derive"
-version = "0.8.23"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6352c01d0edd5db859a63e2605f4ea3183ddbd15e2c4a9e7d32184df75e4f154"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn 2.0.99",
-]
diff --git a/Cargo.toml b/Cargo.toml
index c37117b..ebbe176 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,7 +6,7 @@ authors = [
     "Jack Grigg <thestr4d@gmail.com>",
 ]
 edition = "2021"
-rust-version = "1.63"
+rust-version = "1.85"
 description = "Library for building and interfacing with finite fields"
 readme = "README.md"
 documentation = "https://docs.rs/ff/"
@@ -18,12 +18,12 @@ repository = "https://github.com/zkcrypto/ff"
 bitvec = { version = "1", default-features = false, optional = true }
 byteorder = { version = "1", default-features = false, optional = true }
 ff_derive = { version = "=0.14.0-pre", package = "rustcrypto-ff_derive", path = "ff_derive", optional = true }
-rand_core = { version = "0.9", default-features = false }
+rand_core = { version = "0.10.0-rc-2", default-features = false }
 subtle = { version = "2.2.1", default-features = false, features = ["i128"] }
 
 [dev-dependencies]
 blake2b_simd = "1"
-rand = "0.9"
+rand = "0.10.0-rc.1"
 
 [features]
 default = ["bits", "std"]
diff --git a/README.md b/README.md
index 9a279ee..9f318c3 100644
--- a/README.md
+++ b/README.md
@@ -61,7 +61,7 @@ And that's it! `Fp` now implements `Field` and `PrimeField`.
 
 ## Minimum Supported Rust Version
 
-Requires Rust **1.63** or higher.
+Requires Rust **1.85** or higher.
 
 Minimum supported Rust version can be changed in the future, but it will be done with a
 minor version bump.
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
index 3eebdfe..efd3308 100644
--- a/rust-toolchain.toml
+++ b/rust-toolchain.toml
@@ -1,3 +1,3 @@
 [toolchain]
-channel = "1.63.0"
+channel = "1.85.0"
 components = [ "clippy", "rustfmt" ]