diff --git a/Cargo.lock b/Cargo.lock
index ec12e1a..dc45f46 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -279,9 +279,9 @@ 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",
@@ -362,9 +362,9 @@ dependencies = [
 
 [[package]]
 name = "regex-syntax"
-version = "0.7.5"
+version = "0.8.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dbb5fb1acd8a1a18b3dd5be62d25485eb770e05afb408a9627d14d451bae12da"
+checksum = "c08c74e62047bb2de4ff487b251e4a92e24f48745648451635cec7d591162d9f"
 
 [[package]]
 name = "remove_dir_all"
diff --git a/Cargo.toml b/Cargo.toml
index b0286df..3649403 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -9,4 +9,4 @@ license = "Apache-2.0"
 chrono = "0.4"
 
 [dev-dependencies]
-proptest = "1.3.1"
+proptest = "1.4.0"