diff --git a/Cargo.lock b/Cargo.lock
index 53d6169912249..3fe2f17ea236c 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -6743,9 +6743,9 @@ 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",
@@ -6755,7 +6755,7 @@ dependencies = [
  "rand 0.8.5",
  "rand_chacha 0.3.1",
  "rand_xorshift",
- "regex-syntax 0.7.5",
+ "regex-syntax 0.8.2",
  "rusty-fork",
  "tempfile",
  "unarray",
diff --git a/Cargo.toml b/Cargo.toml
index 35670f82ee96a..59bdb1402d981 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -351,7 +351,7 @@ criterion = { version = "0.5.1", features = ["html_reports", "async_tokio"] }
 itertools = { version = "0.11.0", default-features = false, features = ["use_alloc"] }
 libc = "0.2.150"
 similar-asserts = "1.5.0"
-proptest = "1.3"
+proptest = "1.4"
 quickcheck = "1.0.3"
 reqwest = { version = "0.11", features = ["json"] }
 rstest = {version = "0.18.2"}
diff --git a/lib/vector-buffers/Cargo.toml b/lib/vector-buffers/Cargo.toml
index b3f36267463d4..c22bcad6ab7b0 100644
--- a/lib/vector-buffers/Cargo.toml
+++ b/lib/vector-buffers/Cargo.toml
@@ -41,7 +41,7 @@ hdrhistogram = "7.5.2"
 metrics-tracing-context = { version = "0.14.0", default-features = false }
 metrics-util = { version = "0.15.1", default-features = false, features = ["debugging"] }
 once_cell = "1.18"
-proptest = "1.3"
+proptest = "1.4"
 quickcheck = "1.0"
 rand = "0.8.5"
 serde_yaml = { version = "0.9", default-features = false }
diff --git a/lib/vector-core/Cargo.toml b/lib/vector-core/Cargo.toml
index c62e3910561f8..ce276db48b219 100644
--- a/lib/vector-core/Cargo.toml
+++ b/lib/vector-core/Cargo.toml
@@ -34,7 +34,7 @@ ordered-float = { version = "4.1.1", default-features = false }
 openssl = { version = "0.10.59", default-features = false, features = ["vendored"] }
 parking_lot = { version = "0.12.1", default-features = false }
 pin-project.workspace = true
-proptest = { version = "1.3", optional = true }
+proptest = { version = "1.4", optional = true }
 prost-types = { version = "0.12", default-features = false }
 prost = { version = "0.12", default-features = false, features = ["std"] }
 quanta = { version = "0.12.1", default-features = false }
@@ -80,7 +80,7 @@ criterion = { version = "0.5.1", features = ["html_reports"] }
 env-test-util = "1.0.1"
 quickcheck = "1"
 quickcheck_macros = "1"
-proptest = "1.3"
+proptest = "1.4"
 similar-asserts = "1.5.0"
 tokio-test = "0.4.3"
 toml = { version = "0.8.8", default-features = false, features = ["parse"] }
diff --git a/lib/vector-stream/Cargo.toml b/lib/vector-stream/Cargo.toml
index 5525a4d753221..794c03acde6ae 100644
--- a/lib/vector-stream/Cargo.toml
+++ b/lib/vector-stream/Cargo.toml
@@ -19,6 +19,6 @@ vector-common = { path = "../vector-common" }
 vector-core = { path = "../vector-core" }
 
 [dev-dependencies]
-proptest = "1.3"
+proptest = "1.4"
 rand = "0.8.5"
 rand_distr = "0.4.3"