diff --git a/Cargo.lock b/Cargo.lock
index 21d67668feb..d0552b50f90 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3662,9 +3662,9 @@ dependencies = [
 
 [[package]]
 name = "serde"
-version = "1.0.215"
+version = "1.0.216"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6513c1ad0b11a9376da888e3e0baa0077f1aed55c17f50e7b2397136129fb88f"
+checksum = "0b9781016e935a97e8beecf0c933758c97a5520d32930e460142b4cd80c6338e"
 dependencies = [
  "serde_derive",
 ]
@@ -3692,9 +3692,9 @@ dependencies = [
 
 [[package]]
 name = "serde_derive"
-version = "1.0.215"
+version = "1.0.216"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ad1e866f866923f252f05c889987993144fb74e722403468a4ebd70c3cd756c0"
+checksum = "46f859dbbf73865c6627ed570e78961cd3ac92407a2d117204c49232485da55e"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/cargo-guppy/Cargo.toml b/cargo-guppy/Cargo.toml
index d316e2b314d..79082c5134e 100644
--- a/cargo-guppy/Cargo.toml
+++ b/cargo-guppy/Cargo.toml
@@ -16,7 +16,7 @@ guppy = { version = "0.17.10", path = "../guppy", features = ["summaries"] }
 guppy-cmdlib = { path = "../guppy-cmdlib" }
 itertools = "0.13.0"
 pathdiff = { version = "0.2.3", features = ["camino"] }
-serde = { version = "1.0.215", features = ["derive"] }
+serde = { version = "1.0.216", features = ["derive"] }
 serde_json = "1.0.133"
 toml_edit = "0.17.1"
 guppy-workspace-hack.workspace = true
diff --git a/guppy-summaries/Cargo.toml b/guppy-summaries/Cargo.toml
index cc0ffa199cf..b476b594e31 100644
--- a/guppy-summaries/Cargo.toml
+++ b/guppy-summaries/Cargo.toml
@@ -31,7 +31,7 @@ cfg-if = "1.0.0"
 diffus = "0.10.0"
 toml = { version = "0.5.11", features = ["preserve_order"] }
 semver = { version = "1.0.24", features = ["serde"] }
-serde = { version = "1.0.215", features = ["derive"] }
+serde = { version = "1.0.216", features = ["derive"] }
 guppy-workspace-hack.workspace = true
 
 [dev-dependencies]
diff --git a/guppy/Cargo.toml b/guppy/Cargo.toml
index fa950e04e09..9b59977007c 100644
--- a/guppy/Cargo.toml
+++ b/guppy/Cargo.toml
@@ -46,7 +46,7 @@ proptest = { version = "1.5.0", optional = true }
 proptest-derive = { version = "0.5.1", optional = true }
 rayon = { version = "1.10.0", optional = true }
 semver = "1.0.24"
-serde = { version = "1.0.215", features = ["derive"] }
+serde = { version = "1.0.216", features = ["derive"] }
 serde_json = "1.0.133"
 smallvec = "1.13.2"
 static_assertions = "1.1.0"
diff --git a/target-spec/Cargo.toml b/target-spec/Cargo.toml
index 69aaa0901df..b8066d008a1 100644
--- a/target-spec/Cargo.toml
+++ b/target-spec/Cargo.toml
@@ -22,7 +22,7 @@ maintenance = { status = "actively-developed" }
 [dependencies]
 cfg-expr = { version = "0.17.0", features = ["targets"] }
 proptest = { version = "1.5.0", optional = true }
-serde = { version = "1.0.215", optional = true, features = ["derive"] }
+serde = { version = "1.0.216", optional = true, features = ["derive"] }
 serde_json = { version = "1.0.133", optional = true }
 target-lexicon = { version = "0.12.16", features = ["std"] }
 unicode-ident = "1.0.14"
diff --git a/tools/determinator/Cargo.toml b/tools/determinator/Cargo.toml
index 2a311b91012..b410e445422 100644
--- a/tools/determinator/Cargo.toml
+++ b/tools/determinator/Cargo.toml
@@ -37,7 +37,7 @@ petgraph = { version = "0.6.5", default-features = false, features = [
     "graphmap",
 ] }
 rayon = "1.10.0"
-serde = { version = "1.0.215", features = ["derive"] }
+serde = { version = "1.0.216", features = ["derive"] }
 toml = "0.5.11"
 guppy-workspace-hack.workspace = true
 
diff --git a/tools/hakari/Cargo.toml b/tools/hakari/Cargo.toml
index 39e2483c974..1090d8137dd 100644
--- a/tools/hakari/Cargo.toml
+++ b/tools/hakari/Cargo.toml
@@ -38,7 +38,7 @@ pathdiff = { version = "0.2.3", features = ["camino"] }
 proptest = { version = "1.5.0", optional = true }
 proptest-derive = { version = "0.5.1", optional = true }
 rayon = "1.10.0"
-serde = { version = "1.0.215", features = ["derive"], optional = true }
+serde = { version = "1.0.216", features = ["derive"], optional = true }
 tabular = { version = "0.2.0", features = ["ansi-cell"], optional = true }
 target-spec = { version = "3.2.2", path = "../../target-spec" }
 toml = { version = "0.5.11", optional = true }
diff --git a/workspace-hack/Cargo.toml b/workspace-hack/Cargo.toml
index 3242f7f4f28..9784d3e619a 100644
--- a/workspace-hack/Cargo.toml
+++ b/workspace-hack/Cargo.toml
@@ -33,7 +33,7 @@ petgraph = { version = "0.6.5", default-features = false, features = ["graphmap"
 regex = { version = "1.10.5", default-features = false, features = ["perf", "std"] }
 regex-automata = { version = "0.4.5", default-features = false, features = ["dfa", "hybrid", "meta", "nfa", "perf", "unicode"] }
 regex-syntax = { version = "0.8.2" }
-serde = { version = "1.0.215", features = ["alloc", "derive"] }
+serde = { version = "1.0.216", features = ["alloc", "derive"] }
 serde_json = { version = "1.0.133", features = ["unbounded_depth"] }
 textwrap = { version = "0.16.0" }
 toml = { version = "0.5.11", features = ["preserve_order"] }