diff --git a/Cargo.lock b/Cargo.lock
index c3413df0..1d61cabb 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -138,8 +138,7 @@ dependencies = [
 [[package]]
 name = "crypto-bigint"
 version = "0.7.0-rc.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f2966eb7f877e5cdac7e808e71010d0bef6321d58b8e58bf01b8bbbe44f77ea0"
+source = "git+https://github.com/andrewwhitehead/crypto-bigint.git?branch=feat%2Fwrapping-mul-2#025a1d6b4fefb3664819be060240aa47e3d51959"
 dependencies = [
  "num-traits",
  "rand_core",
diff --git a/Cargo.toml b/Cargo.toml
index 6d5c01af..c959e9e3 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -68,3 +68,6 @@ opt-level = 2
 
 [profile.bench]
 debug = true
+
+[patch.crates-io]
+crypto-bigint = { git = "https://github.com/andrewwhitehead/crypto-bigint.git", branch = "feat/wrapping-mul-2" }