diff --git a/Cargo.lock b/Cargo.lock
index 9f582b00..0091dd06 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -891,9 +891,9 @@ dependencies = [
 
 [[package]]
 name = "proptest"
-version = "1.4.0"
+version = "1.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "31b476131c3c86cb68032fdc5cb6d5a1045e3e42d96b69fa599fd77701e1f5bf"
+checksum = "b4c2511913b88df1637da85cc8d96ec8e43a3f8bb8ccb71ee1ac240d6f3df58d"
 dependencies = [
  "bit-set",
  "bit-vec",
diff --git a/k256/Cargo.toml b/k256/Cargo.toml
index ba10568f..d4688435 100644
--- a/k256/Cargo.toml
+++ b/k256/Cargo.toml
@@ -37,7 +37,7 @@ ecdsa-core = { version = "=0.17.0-pre.5", package = "ecdsa", default-features =
 hex-literal = "0.4"
 num-bigint = "0.4"
 num-traits = "0.2"
-proptest = "1.4"
+proptest = "1.5"
 rand_core = { version = "0.6", features = ["getrandom"] }
 sha3 = { version = "=0.11.0-pre.3", default-features = false }
 
diff --git a/p384/Cargo.toml b/p384/Cargo.toml
index 3a56b11d..3317f98a 100644
--- a/p384/Cargo.toml
+++ b/p384/Cargo.toml
@@ -33,7 +33,7 @@ criterion = "0.5"
 ecdsa-core = { version = "=0.17.0-pre.5", package = "ecdsa", default-features = false, features = ["dev"] }
 hex-literal = "0.4"
 primeorder = { version = "=0.14.0-pre.0", features = ["dev"], path = "../primeorder" }
-proptest = "1.4"
+proptest = "1.5"
 rand_core = { version = "0.6", features = ["getrandom"] }
 
 [features]
diff --git a/p521/Cargo.toml b/p521/Cargo.toml
index b945f24d..868e4201 100644
--- a/p521/Cargo.toml
+++ b/p521/Cargo.toml
@@ -34,7 +34,7 @@ blobby = "0.3"
 ecdsa-core = { version = "=0.17.0-pre.5", package = "ecdsa", default-features = false, features = ["dev"] }
 hex-literal = "0.4"
 primeorder = { version = "=0.14.0-pre.0", features = ["dev"], path = "../primeorder" }
-proptest = "1.4"
+proptest = "1.5"
 rand_core = { version = "0.6", features = ["getrandom"] }
 criterion = "0.5.1"