diff --git a/Cargo.lock b/Cargo.lock
index b93d056f9a9..e362c0b540d 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3712,9 +3712,9 @@ dependencies = [
 
 [[package]]
 name = "serde_json"
-version = "1.0.133"
+version = "1.0.134"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c7fceb2473b9166b2294ef05efcb65a3db80803f0b03ef86a5fc88a2b85ee377"
+checksum = "d00f4175c42ee48b15416f6193a959ba3a0d67fc699a0db9ad12df9f83991c7d"
 dependencies = [
  "itoa",
  "memchr",
diff --git a/cargo-guppy/Cargo.toml b/cargo-guppy/Cargo.toml
index 79082c5134e..8d4bac3e8ce 100644
--- a/cargo-guppy/Cargo.toml
+++ b/cargo-guppy/Cargo.toml
@@ -17,6 +17,6 @@ guppy-cmdlib = { path = "../guppy-cmdlib" }
 itertools = "0.13.0"
 pathdiff = { version = "0.2.3", features = ["camino"] }
 serde = { version = "1.0.216", features = ["derive"] }
-serde_json = "1.0.133"
+serde_json = "1.0.134"
 toml_edit = "0.17.1"
 guppy-workspace-hack.workspace = true
diff --git a/guppy-summaries/Cargo.toml b/guppy-summaries/Cargo.toml
index b476b594e31..19716d7af61 100644
--- a/guppy-summaries/Cargo.toml
+++ b/guppy-summaries/Cargo.toml
@@ -37,4 +37,4 @@ guppy-workspace-hack.workspace = true
 [dev-dependencies]
 indoc = "2.0.5"
 pretty_assertions = "1.4.1"
-serde_json = "1.0.133"
+serde_json = "1.0.134"
diff --git a/guppy/Cargo.toml b/guppy/Cargo.toml
index 9b59977007c..e8bab7fb2a5 100644
--- a/guppy/Cargo.toml
+++ b/guppy/Cargo.toml
@@ -47,7 +47,7 @@ proptest-derive = { version = "0.5.1", optional = true }
 rayon = { version = "1.10.0", optional = true }
 semver = "1.0.24"
 serde = { version = "1.0.216", features = ["derive"] }
-serde_json = "1.0.133"
+serde_json = "1.0.134"
 smallvec = "1.13.2"
 static_assertions = "1.1.0"
 target-spec = { version = "3.2.2", path = "../target-spec" }
diff --git a/target-spec/Cargo.toml b/target-spec/Cargo.toml
index e7e2270c711..b08bb411ef1 100644
--- a/target-spec/Cargo.toml
+++ b/target-spec/Cargo.toml
@@ -23,7 +23,7 @@ maintenance = { status = "actively-developed" }
 cfg-expr = { workspace = true, features = ["targets"] }
 proptest = { version = "1.5.0", optional = true }
 serde = { version = "1.0.216", optional = true, features = ["derive"] }
-serde_json = { version = "1.0.133", optional = true }
+serde_json = { version = "1.0.134", optional = true }
 target-lexicon = { version = "0.12.16", features = ["std"] }
 unicode-ident = "1.0.14"
 guppy-workspace-hack.workspace = true
diff --git a/workspace-hack/Cargo.toml b/workspace-hack/Cargo.toml
index 9784d3e619a..d025e81ed89 100644
--- a/workspace-hack/Cargo.toml
+++ b/workspace-hack/Cargo.toml
@@ -34,7 +34,7 @@ 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 = "1.0.216", features = ["alloc", "derive"] }
-serde_json = { version = "1.0.133", features = ["unbounded_depth"] }
+serde_json = { version = "1.0.134", features = ["unbounded_depth"] }
 textwrap = { version = "0.16.0" }
 toml = { version = "0.5.11", features = ["preserve_order"] }