diff --git a/Cargo.lock b/Cargo.lock
index b06cce0..4fcc7c2 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -699,9 +699,9 @@ dependencies = [
 
 [[package]]
 name = "proptest"
-version = "1.3.1"
+version = "1.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7c003ac8c77cb07bb74f5f198bce836a689bcd5a42574612bf14d17bfd08c20e"
+checksum = "31b476131c3c86cb68032fdc5cb6d5a1045e3e42d96b69fa599fd77701e1f5bf"
 dependencies = [
  "bit-set",
  "bit-vec",
@@ -711,7 +711,7 @@ dependencies = [
  "rand",
  "rand_chacha",
  "rand_xorshift",
- "regex-syntax 0.7.5",
+ "regex-syntax 0.8.2",
  "rusty-fork",
  "tempfile",
  "unarray",
@@ -844,6 +844,12 @@ version = "0.7.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "dbb5fb1acd8a1a18b3dd5be62d25485eb770e05afb408a9627d14d451bae12da"
 
+[[package]]
+name = "regex-syntax"
+version = "0.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c08c74e62047bb2de4ff487b251e4a92e24f48745648451635cec7d591162d9f"
+
 [[package]]
 name = "rnix"
 version = "0.11.0"
diff --git a/Cargo.toml b/Cargo.toml
index 8447c21..2010068 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -92,4 +92,4 @@ opt-level = 3
 [dev-dependencies]
 criterion = "0.5.1"
 insta = { version = "1.34.0", features = ["yaml"] }
-proptest = "1.3.1"
+proptest = "1.4.0"