diff --git a/Cargo.lock b/Cargo.lock
index 6189f246c..20ba8776a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2035,9 +2035,9 @@ checksum = "c08d65885ee38876c4f86fa503fb49d7b507c2b62552df7c70b2fce627e06381"
 
 [[package]]
 name = "openssl"
-version = "0.10.64"
+version = "0.10.66"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "95a0481286a310808298130d22dd1fef0fa571e05a8f44ec801801e84b216b1f"
+checksum = "9529f4786b70a3e8c61e11179af17ab6188ad8d0ded78c5529441ed39d4bd9c1"
 dependencies = [
  "bitflags 2.5.0",
  "cfg-if 1.0.0",
@@ -2081,9 +2081,9 @@ checksum = "ff011a302c396a5197692431fc1948019154afc178baf7d8e37367442a4601cf"
 
 [[package]]
 name = "openssl-sys"
-version = "0.9.101"
+version = "0.9.103"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dda2b0f344e78efc2facf7d195d098df0dd72151b26ab98da807afc26c198dff"
+checksum = "7f9e8deee91df40a943c71b917e5874b951d32a802526c85721ce3b776c929d6"
 dependencies = [
  "cc",
  "libc",
diff --git a/admin-tool/Cargo.toml b/admin-tool/Cargo.toml
index f2458b4dd..b9a3d0701 100644
--- a/admin-tool/Cargo.toml
+++ b/admin-tool/Cargo.toml
@@ -9,7 +9,7 @@ edition = "2018"
 [dependencies]
 anyhow = "1"
 config = "0.13.4"
-openssl = "0.10.60"
+openssl = "0.10.66"
 log = "0.4"
 time = "0.3"
 clap = { version = "4.4", features = ["derive"] }
diff --git a/client-linuxapp/Cargo.toml b/client-linuxapp/Cargo.toml
index 1dd755700..db0357caa 100644
--- a/client-linuxapp/Cargo.toml
+++ b/client-linuxapp/Cargo.toml
@@ -19,7 +19,7 @@ thiserror = "1"
 libcryptsetup-rs = { version = "0.9.0", features = ["mutex"] }
 secrecy = "0.8"
 devicemapper = "0.34"
-openssl = "0.10.60"
+openssl = "0.10.66"
 
 fdo-data-formats = { path = "../data-formats", version = "0.5.0" }
 fdo-http-wrapper = { path = "../http-wrapper", version = "0.5.0", features = ["client"] }
diff --git a/data-formats/Cargo.toml b/data-formats/Cargo.toml
index 9f1b1ea65..105814d93 100644
--- a/data-formats/Cargo.toml
+++ b/data-formats/Cargo.toml
@@ -9,7 +9,7 @@ edition = "2018"
 [dependencies]
 ciborium = "0.2.0"
 hex = "0.4"
-openssl = "0.10.60"
+openssl = "0.10.66"
 log = "0.4"
 serde = "1"
 serde_bytes = "0.11"
diff --git a/db/Cargo.toml b/db/Cargo.toml
index 6fc33e716..3e9d83c01 100644
--- a/db/Cargo.toml
+++ b/db/Cargo.toml
@@ -12,7 +12,7 @@ fdo-data-formats = { path = "../data-formats", version = "0.5.0" }
 
 [dev-dependencies]
 fdo-http-wrapper = { path = "../http-wrapper", version = "0.5.0", features = ["server"] }
-openssl = "0.10.55"
+openssl = "0.10.66"
 
 [features]
 postgres = []
diff --git a/http-wrapper/Cargo.toml b/http-wrapper/Cargo.toml
index 69af2ec66..c654c54df 100644
--- a/http-wrapper/Cargo.toml
+++ b/http-wrapper/Cargo.toml
@@ -16,7 +16,7 @@ pretty_env_logger = "0.5"
 
 hex = "0.4"
 
-openssl = "0.10.60"
+openssl = "0.10.66"
 
 fdo-data-formats = { path = "../data-formats", version = "0.5.0" }
 fdo-store = { path = "../store", version = "0.5.0" }
diff --git a/integration-tests/Cargo.toml b/integration-tests/Cargo.toml
index 9290c20f4..3770c34fb 100644
--- a/integration-tests/Cargo.toml
+++ b/integration-tests/Cargo.toml
@@ -23,7 +23,7 @@ tempfile = "3"
 tera = "1"
 regex = "1.3.7"
 lazy_static = "1.4.0"
-openssl = "0.10.60"
+openssl = "0.10.66"
 libc = "0.2"
 reqwest = { version = "0.11", features = ["json"] }
 tokio = "1.25.0"
diff --git a/manufacturing-client/Cargo.toml b/manufacturing-client/Cargo.toml
index 58d108746..c535a81d1 100644
--- a/manufacturing-client/Cargo.toml
+++ b/manufacturing-client/Cargo.toml
@@ -11,7 +11,7 @@ anyhow = "1"
 clap = { version = "4.4", features = ["derive"] }
 hex = "0.4"
 log = "0.4"
-openssl = "0.10.60"
+openssl = "0.10.66"
 tokio = { version = "1", features = ["full"] }
 rand = "0.8.4"
 tss-esapi = { version = "7.4", features = ["generate-bindings"] }
diff --git a/manufacturing-server/Cargo.toml b/manufacturing-server/Cargo.toml
index af069d318..0da5591f8 100644
--- a/manufacturing-server/Cargo.toml
+++ b/manufacturing-server/Cargo.toml
@@ -12,7 +12,7 @@ config = "0.13.4"
 tokio = { version = "1", features = ["full"] }
 thiserror= "1"
 serde = "1"
-openssl = "0.10.60"
+openssl = "0.10.66"
 warp = "0.3.6"
 log = "0.4"
 hex = "0.4"
diff --git a/owner-onboarding-server/Cargo.toml b/owner-onboarding-server/Cargo.toml
index e334f1f10..3767b1060 100644
--- a/owner-onboarding-server/Cargo.toml
+++ b/owner-onboarding-server/Cargo.toml
@@ -12,7 +12,7 @@ config = "0.13.4"
 tokio = { version = "1", features = ["full"] }
 thiserror= "1"
 serde = "1"
-openssl = "0.10.60"
+openssl = "0.10.66"
 warp = "0.3.6"
 serde_bytes = "0.11"
 serde_cbor = "0.11"
diff --git a/owner-tool/Cargo.toml b/owner-tool/Cargo.toml
index 999f07648..46e1d1a20 100644
--- a/owner-tool/Cargo.toml
+++ b/owner-tool/Cargo.toml
@@ -10,7 +10,7 @@ edition = "2018"
 anyhow = "1.0"
 clap = { version = "4.4", features = ["derive"] }
 log = "0.4"
-openssl = "0.10.60"
+openssl = "0.10.66"
 serde = { version = "1", features = ["derive"] }
 serde_yaml = "0.9"
 tokio = { version = "1", features = ["full"] }
diff --git a/rendezvous-server/Cargo.toml b/rendezvous-server/Cargo.toml
index cd3ba92b9..e4f477e4a 100644
--- a/rendezvous-server/Cargo.toml
+++ b/rendezvous-server/Cargo.toml
@@ -12,7 +12,7 @@ config = "0.13.4"
 tokio = { version = "1", features = ["full"] }
 thiserror= "1"
 serde = "1"
-openssl = "0.10.60"
+openssl = "0.10.66"
 warp = "0.3.6"
 log = "0.4"
 time = "0.3"