diff --git a/Cargo.lock b/Cargo.lock
index fd3be8b..27b5fcb 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -194,8 +194,8 @@ dependencies = [
 
 [[package]]
 name = "generic-ec"
-version = "0.4.0-rc3"
-source = "git+https://github.com/dfns/generic-ec?branch=update-udigest#f073395cbe53411ee1ddf9ef40a1933e96c41804"
+version = "0.4.0-rc4"
+source = "git+https://github.com/dfns/generic-ec?branch=update-udigest#8fbc75205c10dd9677fb67cf6eea67c6b44d836e"
 dependencies = [
  "generic-ec-core",
  "generic-ec-curves",
@@ -211,7 +211,7 @@ dependencies = [
 [[package]]
 name = "generic-ec-core"
 version = "0.2.0"
-source = "git+https://github.com/dfns/generic-ec?branch=update-udigest#f073395cbe53411ee1ddf9ef40a1933e96c41804"
+source = "git+https://github.com/dfns/generic-ec?branch=update-udigest#8fbc75205c10dd9677fb67cf6eea67c6b44d836e"
 dependencies = [
  "generic-array",
  "rand_core",
@@ -223,7 +223,7 @@ dependencies = [
 [[package]]
 name = "generic-ec-curves"
 version = "0.2.1"
-source = "git+https://github.com/dfns/generic-ec?branch=update-udigest#f073395cbe53411ee1ddf9ef40a1933e96c41804"
+source = "git+https://github.com/dfns/generic-ec?branch=update-udigest#8fbc75205c10dd9677fb67cf6eea67c6b44d836e"
 dependencies = [
  "elliptic-curve",
  "generic-ec-core",
@@ -439,7 +439,7 @@ dependencies = [
 
 [[package]]
 name = "slip-10"
-version = "0.4.0-rc3"
+version = "0.4.0-rc4"
 dependencies = [
  "generic-array",
  "generic-ec",
diff --git a/Cargo.toml b/Cargo.toml
index d288aa3..cc5085c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "slip-10"
-version = "0.4.0-rc3"
+version = "0.4.0-rc4"
 edition = "2021"
 license = "MIT OR Apache-2.0"
 description = "SLIP10 implementation in Rust"
@@ -9,7 +9,7 @@ repository = "https://github.com/dfns/slip-10"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-generic-ec = { version = "0.4.0-rc3", default-features = false }
+generic-ec = { version = "0.4.0-rc4", default-features = false }
 
 hmac = { version = "0.12", default-features = false }
 sha2 = { version = "0.10", default-features = false }