diff --git a/Cargo.lock b/Cargo.lock
index 3f357422a..95bf03fe9 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -373,8 +373,9 @@ dependencies = [
 
 [[package]]
 name = "ecdsa"
-version = "0.17.0-rc.7"
-source = "git+https://github.com/RustCrypto/signatures.git#305bad5a0067712634089e2aa948aaf1f75bd023"
+version = "0.17.0-rc.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b56e025680b64794fad81dd46019037773eeb5268a990c5d4cca05bf351c7f0f"
 dependencies = [
  "der",
  "digest",
@@ -1056,8 +1057,9 @@ checksum = "caf4aa5b0f434c91fe5c7f1ecb6a5ece2130b02ad2a590589dda5146df959001"
 
 [[package]]
 name = "rfc6979"
-version = "0.5.0-rc.1"
-source = "git+https://github.com/RustCrypto/signatures.git#305bad5a0067712634089e2aa948aaf1f75bd023"
+version = "0.5.0-rc.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2a165e1723c68a5c6c3746322ba13f0e167206be428305bc9c76e204eacc639c"
 dependencies = [
  "hmac",
  "subtle",
diff --git a/Cargo.toml b/Cargo.toml
index 31a42f61a..879ffdb4d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -26,6 +26,3 @@ ed448-goldilocks = { path = "ed448-goldilocks" }
 hash2curve = { path = "hash2curve" }
 primefield = { path = "primefield" }
 primeorder = { path = "primeorder" }
-
-ecdsa = { git = "https://github.com/RustCrypto/signatures.git" }
-rfc6979 = { git = "https://github.com/RustCrypto/signatures.git" }
diff --git a/bp256/Cargo.toml b/bp256/Cargo.toml
index 88374f748..3719417cc 100644
--- a/bp256/Cargo.toml
+++ b/bp256/Cargo.toml
@@ -17,7 +17,7 @@ rust-version = "1.85"
 elliptic-curve = { version = "0.14.0-rc.16", default-features = false, features = ["sec1"] }
 
 # optional dependencies
-ecdsa = { version = "0.17.0-rc.7", optional = true, default-features = false, features = ["der"] }
+ecdsa = { version = "0.17.0-rc.8", optional = true, default-features = false, features = ["der"] }
 primefield = { version = "=0.14.0-pre.6", optional = true }
 primeorder = { version = "=0.14.0-pre.9", optional = true }
 sha2 = { version = "0.11.0-rc.2", optional = true, default-features = false }
diff --git a/bp384/Cargo.toml b/bp384/Cargo.toml
index 1fbe9aeb2..89e4a852d 100644
--- a/bp384/Cargo.toml
+++ b/bp384/Cargo.toml
@@ -17,7 +17,7 @@ rust-version = "1.85"
 elliptic-curve = { version = "0.14.0-rc.16", default-features = false, features = ["sec1"] }
 
 # optional dependencies
-ecdsa = { version = "0.17.0-rc.7", optional = true, default-features = false, features = ["der"] }
+ecdsa = { version = "0.17.0-rc.8", optional = true, default-features = false, features = ["der"] }
 primefield = { version = "=0.14.0-pre.6", optional = true }
 primeorder = { version = "=0.14.0-pre.9", optional = true }
 sha2 = { version = "0.11.0-rc.2", optional = true, default-features = false }
diff --git a/k256/Cargo.toml b/k256/Cargo.toml
index f8e1b2131..cf723c797 100644
--- a/k256/Cargo.toml
+++ b/k256/Cargo.toml
@@ -24,7 +24,7 @@ elliptic-curve = { version = "0.14.0-rc.16", default-features = false, features
 hash2curve = { version = "0.14.0-rc.2", optional = true }
 
 # optional dependencies
-ecdsa-core = { version = "0.17.0-rc.7", package = "ecdsa", optional = true, default-features = false, features = ["der"] }
+ecdsa-core = { version = "0.17.0-rc.8", package = "ecdsa", optional = true, default-features = false, features = ["der"] }
 hex-literal = { version = "1", optional = true }
 primeorder = { version = "=0.14.0-pre.9", optional = true }
 serdect = { version = "0.4", optional = true, default-features = false }
@@ -33,7 +33,7 @@ signature = { version = "3.0.0-rc.4", optional = true }
 
 [dev-dependencies]
 criterion = "0.7"
-ecdsa-core = { version = "0.17.0-rc.7", package = "ecdsa", default-features = false, features = ["dev"] }
+ecdsa-core = { version = "0.17.0-rc.8", package = "ecdsa", default-features = false, features = ["dev"] }
 hex = "0.4.3"
 hex-literal = "1"
 num-bigint = "0.4"
diff --git a/p192/Cargo.toml b/p192/Cargo.toml
index b08ec6d6f..8bdc1e9cf 100644
--- a/p192/Cargo.toml
+++ b/p192/Cargo.toml
@@ -20,14 +20,14 @@ rust-version = "1.85"
 elliptic-curve = { version = "0.14.0-rc.16", default-features = false, features = ["sec1"] }
 
 # optional dependencies
-ecdsa-core = { version = "0.17.0-rc.7", package = "ecdsa", optional = true, default-features = false, features = ["der"] }
+ecdsa-core = { version = "0.17.0-rc.8", package = "ecdsa", optional = true, default-features = false, features = ["der"] }
 hex-literal = { version = "1", optional = true }
 primefield = { version = "=0.14.0-pre.6", optional = true }
 primeorder = { version = "=0.14.0-pre.9", optional = true }
 serdect = { version = "0.4", optional = true, default-features = false }
 
 [dev-dependencies]
-ecdsa-core = { version = "0.17.0-rc.7", package = "ecdsa", default-features = false, features = ["dev"] }
+ecdsa-core = { version = "0.17.0-rc.8", package = "ecdsa", default-features = false, features = ["dev"] }
 hex-literal = "1"
 primeorder = { version = "=0.14.0-pre.9", features = ["dev"] }
 
diff --git a/p224/Cargo.toml b/p224/Cargo.toml
index 183196fc2..3958e14e6 100644
--- a/p224/Cargo.toml
+++ b/p224/Cargo.toml
@@ -20,7 +20,7 @@ rust-version = "1.85"
 elliptic-curve = { version = "0.14.0-rc.16", default-features = false, features = ["sec1"] }
 
 # optional dependencies
-ecdsa-core = { version = "0.17.0-rc.7", package = "ecdsa", optional = true, default-features = false, features = ["der"] }
+ecdsa-core = { version = "0.17.0-rc.8", package = "ecdsa", optional = true, default-features = false, features = ["der"] }
 hex-literal = { version = "1", optional = true }
 primefield = { version = "=0.14.0-pre.6", optional = true }
 primeorder = { version = "=0.14.0-pre.9", optional = true }
@@ -28,7 +28,7 @@ serdect = { version = "0.4", optional = true, default-features = false }
 sha2 = { version = "0.11.0-rc.2", optional = true, default-features = false }
 
 [dev-dependencies]
-ecdsa-core = { version = "0.17.0-rc.7", package = "ecdsa", default-features = false, features = ["dev"] }
+ecdsa-core = { version = "0.17.0-rc.8", package = "ecdsa", default-features = false, features = ["dev"] }
 hex-literal = "1"
 primeorder = { version = "=0.14.0-pre.9", features = ["dev"] }
 rand_core = { version = "0.9", features = ["os_rng"] }
diff --git a/p256/Cargo.toml b/p256/Cargo.toml
index 10afbca7a..e58d57ef1 100644
--- a/p256/Cargo.toml
+++ b/p256/Cargo.toml
@@ -21,7 +21,7 @@ rust-version = "1.85"
 elliptic-curve = { version = "0.14.0-rc.16", default-features = false, features = ["sec1"] }
 
 # optional dependencies
-ecdsa-core = { version = "0.17.0-rc.7", package = "ecdsa", optional = true, default-features = false, features = ["der"] }
+ecdsa-core = { version = "0.17.0-rc.8", package = "ecdsa", optional = true, default-features = false, features = ["der"] }
 hash2curve = { version = "0.14.0-rc.2", optional = true }
 hex-literal = { version = "1", optional = true }
 primefield = { version = "=0.14.0-pre.6", optional = true }
@@ -31,7 +31,7 @@ sha2 = { version = "0.11.0-rc.2", optional = true, default-features = false }
 
 [dev-dependencies]
 criterion = "0.7"
-ecdsa-core = { version = "0.17.0-rc.7", package = "ecdsa", default-features = false, features = ["dev"] }
+ecdsa-core = { version = "0.17.0-rc.8", package = "ecdsa", default-features = false, features = ["dev"] }
 hex-literal = "1"
 primefield = { version = "=0.14.0-pre.6" }
 primeorder = { version = "=0.14.0-pre.9", features = ["dev"] }
diff --git a/p384/Cargo.toml b/p384/Cargo.toml
index 2298dd684..69a30e7f5 100644
--- a/p384/Cargo.toml
+++ b/p384/Cargo.toml
@@ -22,7 +22,7 @@ elliptic-curve = { version = "0.14.0-rc.16", default-features = false, features
 fiat-crypto = { version = "0.3", default-features = false }
 
 # optional dependencies
-ecdsa-core = { version = "0.17.0-rc.7", package = "ecdsa", optional = true, default-features = false, features = ["der"] }
+ecdsa-core = { version = "0.17.0-rc.8", package = "ecdsa", optional = true, default-features = false, features = ["der"] }
 hash2curve = { version = "0.14.0-rc.2", optional = true }
 hex-literal = { version = "1", optional = true }
 primefield = { version = "=0.14.0-pre.6", optional = true }
@@ -32,7 +32,7 @@ sha2 = { version = "0.11.0-rc.2", optional = true, default-features = false }
 
 [dev-dependencies]
 criterion = "0.7"
-ecdsa-core = { version = "0.17.0-rc.7", package = "ecdsa", default-features = false, features = ["dev"] }
+ecdsa-core = { version = "0.17.0-rc.8", package = "ecdsa", default-features = false, features = ["dev"] }
 hex-literal = "1"
 primeorder = { version = "=0.14.0-pre.9", features = ["dev"] }
 proptest = "1.7"
diff --git a/p521/Cargo.toml b/p521/Cargo.toml
index b0f8fa128..3c29a79d1 100644
--- a/p521/Cargo.toml
+++ b/p521/Cargo.toml
@@ -21,7 +21,7 @@ base16ct = "0.3"
 elliptic-curve = { version = "0.14.0-rc.16", default-features = false, features = ["sec1"] }
 
 # optional dependencies
-ecdsa-core = { version = "0.17.0-rc.7", package = "ecdsa", optional = true, default-features = false, features = ["der"] }
+ecdsa-core = { version = "0.17.0-rc.8", package = "ecdsa", optional = true, default-features = false, features = ["der"] }
 hash2curve = { version = "0.14.0-rc.2", optional = true }
 hex-literal = { version = "1", optional = true }
 primefield = { version = "=0.14.0-pre.6", optional = true }
@@ -32,7 +32,7 @@ sha2 = { version = "0.11.0-rc.2", optional = true, default-features = false }
 
 [dev-dependencies]
 criterion = "0.7"
-ecdsa-core = { version = "0.17.0-rc.7", package = "ecdsa", default-features = false, features = ["dev"] }
+ecdsa-core = { version = "0.17.0-rc.8", package = "ecdsa", default-features = false, features = ["dev"] }
 hex-literal = "1"
 primeorder = { version = "=0.14.0-pre.9", features = ["dev"] }
 proptest = "1.7"