diff --git a/Cargo.lock b/Cargo.lock
index 22c5d43efd5..9b27530c26e 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -593,7 +593,7 @@ dependencies = [
  "heck 0.4.1",
  "proc-macro2 1.0.66",
  "quote 1.0.32",
- "syn 2.0.27",
+ "syn 2.0.32",
 ]
 
 [[package]]
@@ -1941,7 +1941,7 @@ dependencies = [
  "serde",
  "serde_json",
  "syn 1.0.109",
- "syn 2.0.27",
+ "syn 2.0.32",
  "toml 0.5.11",
  "winapi",
  "windows-sys 0.48.0",
@@ -2427,7 +2427,7 @@ checksum = "49e7bc1560b95a3c4a25d03de42fe76ca718ab92d1a22a55b9b4cf67b3ae635c"
 dependencies = [
  "proc-macro2 1.0.66",
  "quote 1.0.32",
- "syn 2.0.27",
+ "syn 2.0.32",
 ]
 
 [[package]]
@@ -3186,9 +3186,9 @@ dependencies = [
 
 [[package]]
 name = "serde"
-version = "1.0.178"
+version = "1.0.188"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "60363bdd39a7be0266a520dab25fdc9241d2f987b08a01e01f0ec6d06a981348"
+checksum = "cf9e0fcba69a370eed61bcf2b728575f726b50b55cba78064753d708ddc7549e"
 dependencies = [
  "serde_derive",
 ]
@@ -3205,13 +3205,13 @@ dependencies = [
 
 [[package]]
 name = "serde_derive"
-version = "1.0.178"
+version = "1.0.188"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f28482318d6641454cb273da158647922d1be6b5a2fcc6165cd89ebdd7ed576b"
+checksum = "4eca7ac642d82aa35b60049a6eccb4be6be75e599bd2e9adb5f875a737654af2"
 dependencies = [
  "proc-macro2 1.0.66",
  "quote 1.0.32",
- "syn 2.0.27",
+ "syn 2.0.32",
 ]
 
 [[package]]
@@ -3449,9 +3449,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.27"
+version = "2.0.32"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b60f673f44a8255b9c8c657daf66a596d435f2da81a555b06dc644d080ba45e0"
+checksum = "239814284fd6f1a4ffe4ca893952cdd93c224b6a1571c9a9eadd670295c0c9e2"
 dependencies = [
  "proc-macro2 1.0.66",
  "quote 1.0.32",
@@ -3598,7 +3598,7 @@ checksum = "090198534930841fab3a5d1bb637cde49e339654e606195f8d9c76eeb081dc96"
 dependencies = [
  "proc-macro2 1.0.66",
  "quote 1.0.32",
- "syn 2.0.27",
+ "syn 2.0.32",
 ]
 
 [[package]]
@@ -3902,7 +3902,7 @@ dependencies = [
  "once_cell",
  "proc-macro2 1.0.66",
  "quote 1.0.32",
- "syn 2.0.27",
+ "syn 2.0.32",
  "wasm-bindgen-shared",
 ]
 
@@ -3924,7 +3924,7 @@ checksum = "54681b18a46765f095758388f2d0cf16eb8d4169b639ab575a8f5693af210c7b"
 dependencies = [
  "proc-macro2 1.0.66",
  "quote 1.0.32",
- "syn 2.0.27",
+ "syn 2.0.32",
  "wasm-bindgen-backend",
  "wasm-bindgen-shared",
 ]
diff --git a/cargo-guppy/Cargo.toml b/cargo-guppy/Cargo.toml
index 4a7a984690a..452f9d91579 100644
--- a/cargo-guppy/Cargo.toml
+++ b/cargo-guppy/Cargo.toml
@@ -15,7 +15,7 @@ guppy = { version = "0.17.1", path = "../guppy", features = ["summaries"] }
 guppy-cmdlib = { path = "../guppy-cmdlib" }
 itertools = "0.11.0"
 pathdiff = { version = "0.2.1", features = ["camino"] }
-serde = { version = "1.0.178", features = ["derive"] }
+serde = { version = "1.0.188", features = ["derive"] }
 serde_json = "1.0.104"
 toml_edit = "0.17.1"
 guppy-workspace-hack = { version = "0.1", path = "../workspace-hack" }
diff --git a/guppy-summaries/Cargo.toml b/guppy-summaries/Cargo.toml
index 766a73f537d..baa778b4308 100644
--- a/guppy-summaries/Cargo.toml
+++ b/guppy-summaries/Cargo.toml
@@ -30,7 +30,7 @@ cfg-if = "1.0.0"
 diffus = "0.10.0"
 toml = { version = "0.5.11", features = ["preserve_order"] }
 semver = { version = "1.0.19", features = ["serde"] }
-serde = { version = "1.0.178", features = ["derive"] }
+serde = { version = "1.0.188", features = ["derive"] }
 guppy-workspace-hack = { version = "0.1", path = "../workspace-hack" }
 
 [dev-dependencies]
diff --git a/guppy/Cargo.toml b/guppy/Cargo.toml
index 5d645abc586..9b9ef938ed8 100644
--- a/guppy/Cargo.toml
+++ b/guppy/Cargo.toml
@@ -45,7 +45,7 @@ proptest = { version = "1.2.0", optional = true }
 proptest-derive = { version = "0.3.0", optional = true }
 rayon = { version = "1.7.0", optional = true }
 semver = "1.0.19"
-serde = { version = "1.0.178", features = ["derive"] }
+serde = { version = "1.0.188", features = ["derive"] }
 serde_json = "1.0.104"
 smallvec = "1.11.0"
 static_assertions = "1.1.0"
diff --git a/target-spec/Cargo.toml b/target-spec/Cargo.toml
index d6405e39609..864ec797909 100644
--- a/target-spec/Cargo.toml
+++ b/target-spec/Cargo.toml
@@ -22,7 +22,7 @@ maintenance = { status = "actively-developed" }
 [dependencies]
 cfg-expr = { version = "0.15.4", features = ["targets"] }
 proptest = { version = "1.2.0", optional = true }
-serde = { version = "1.0.178", optional = true, features = ["derive"] }
+serde = { version = "1.0.188", optional = true, features = ["derive"] }
 serde_json = { version = "1.0.104", optional = true }
 target-lexicon = { version = "0.12.10", features = ["std"] }
 guppy-workspace-hack = { version = "0.1", path = "../workspace-hack" }
diff --git a/tools/determinator/Cargo.toml b/tools/determinator/Cargo.toml
index b1e82bdbe5a..387d4979a9e 100644
--- a/tools/determinator/Cargo.toml
+++ b/tools/determinator/Cargo.toml
@@ -36,7 +36,7 @@ petgraph = { version = "0.6.4", default-features = false, features = [
     "graphmap",
 ] }
 rayon = "1.7.0"
-serde = { version = "1.0.178", features = ["derive"] }
+serde = { version = "1.0.188", features = ["derive"] }
 toml = "0.5.11"
 guppy-workspace-hack = { version = "0.1", path = "../../workspace-hack" }
 
diff --git a/tools/hakari/Cargo.toml b/tools/hakari/Cargo.toml
index 40793129100..8fadd62baad 100644
--- a/tools/hakari/Cargo.toml
+++ b/tools/hakari/Cargo.toml
@@ -37,7 +37,7 @@ pathdiff = { version = "0.2.1", features = ["camino"] }
 proptest = { version = "1.2.0", optional = true }
 proptest-derive = { version = "0.3.0", optional = true }
 rayon = "1.7.0"
-serde = { version = "1.0.178", features = ["derive"], optional = true }
+serde = { version = "1.0.188", features = ["derive"], optional = true }
 tabular = { version = "0.2.0", features = ["ansi-cell"], optional = true }
 target-spec = { version = "3.0.1", path = "../../target-spec" }
 toml = { version = "0.5.11", optional = true }
diff --git a/workspace-hack/Cargo.toml b/workspace-hack/Cargo.toml
index 7b8f5829148..8b4f0f704b2 100644
--- a/workspace-hack/Cargo.toml
+++ b/workspace-hack/Cargo.toml
@@ -28,7 +28,7 @@ petgraph = { version = "0.6.4", default-features = false, features = ["graphmap"
 regex = { version = "1.9.1", default-features = false, features = ["perf", "std"] }
 regex-automata = { version = "0.3.4", default-features = false, features = ["dfa-onepass", "hybrid", "meta", "nfa-backtrack", "perf-inline", "perf-literal"] }
 semver = { version = "1.0.19", features = ["serde"] }
-serde = { version = "1.0.178", features = ["alloc", "derive"] }
+serde = { version = "1.0.188", features = ["alloc", "derive"] }
 serde_json = { version = "1.0.104", features = ["unbounded_depth"] }
 toml = { version = "0.5.11", features = ["preserve_order"] }
 
@@ -36,7 +36,7 @@ toml = { version = "0.5.11", features = ["preserve_order"] }
 proc-macro2 = { version = "1.0.66" }
 quote = { version = "1.0.32" }
 syn-dff4ba8e3ae991db = { package = "syn", version = "1.0.109", features = ["extra-traits", "full"] }
-syn-f595c2ba2a3f28df = { package = "syn", version = "2.0.27", features = ["full"] }
+syn-f595c2ba2a3f28df = { package = "syn", version = "2.0.32", features = ["full"] }
 
 [target.x86_64-unknown-linux-gnu.dependencies]
 libc = { version = "0.2.147", default-features = false, features = ["extra_traits"] }