diff --git a/Cargo.lock b/Cargo.lock
index 4a2452f..ea6f78b 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -117,6 +117,18 @@ version = "0.9.26"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0b86829876e7e200161a5aa6ea688d46c32d64d70ee3100127790dde84688d6e"
 
+[[package]]
+name = "bumpalo"
+version = "3.20.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "72f5acc6cb2ba439de613abc23857ec3d78374d8ed5ac84e9d11336e87da8649"
+
+[[package]]
+name = "bytecount"
+version = "0.6.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "175812e0be2bccb6abe50bb8d566126198344f707e304f45c648fd8f2cc0365e"
+
 [[package]]
 name = "cap-fs-ext"
 version = "4.0.2"
@@ -126,7 +138,7 @@ dependencies = [
  "cap-primitives",
  "cap-std",
  "io-lifetimes 3.0.1",
- "windows-sys 0.60.2",
+ "windows-sys 0.61.2",
 ]
 
 [[package]]
@@ -143,7 +155,7 @@ dependencies = [
  "maybe-owned",
  "rustix",
  "rustix-linux-procfs",
- "windows-sys 0.60.2",
+ "windows-sys 0.61.2",
  "winx",
 ]
 
@@ -266,7 +278,7 @@ version = "3.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "faf9468729b8cbcea668e36183cb69d317348c2e08e994829fb56ebfdfbaac34"
 dependencies = [
- "windows-sys 0.59.0",
+ "windows-sys 0.61.2",
 ]
 
 [[package]]
@@ -455,7 +467,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "39cab71617ae0d63f51a36d69f866391735b51691dbda63cf6f96d042b63efeb"
 dependencies = [
  "libc",
- "windows-sys 0.59.0",
+ "windows-sys 0.61.2",
 ]
 
 [[package]]
@@ -725,6 +737,17 @@ version = "1.0.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8f42a60cbdf9a97f5d2305f08a87dc4e09308d1276d28c869c684d7777685682"
 
+[[package]]
+name = "js-sys"
+version = "0.3.104"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0e0c1080212aad755ea003d18543e8768dd432c48819efd73a7bf1e39b7a5a3a"
+dependencies = [
+ "cfg-if",
+ "futures-util",
+ "wasm-bindgen",
+]
+
 [[package]]
 name = "json-escape-simd"
 version = "3.1.1"
@@ -948,10 +971,12 @@ checksum = "d211803b9b6b570f68772237e415a029d5a50c65d382910b879fb19d3271f94d"
 
 [[package]]
 name = "oxc-browserslist"
-version = "3.0.11"
+version = "5.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "50a403a3c6be65be7bc7730d07d959ec6c143e4ff8117da485df78cd5582260a"
+checksum = "456720daa870e4f69f8d29fded1c8deea82da4780a6b8553baa160eb0cd8d864"
 dependencies = [
+ "js-sys",
+ "libc",
  "miniz_oxide 0.9.1",
  "postcard",
  "rustc-hash",
@@ -959,38 +984,11 @@ dependencies = [
  "thiserror",
 ]
 
-[[package]]
-name = "oxc-miette"
-version = "3.0.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2e0df30faa68797917ca4263e7a2f889ec829e4da2dcb3d6dc752f7a494180f3"
-dependencies = [
- "cfg-if",
- "memchr",
- "owo-colors",
- "oxc-miette-derive",
- "textwrap",
- "thiserror",
- "unicode-segmentation",
- "unicode-width",
-]
-
-[[package]]
-name = "oxc-miette-derive"
-version = "3.0.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "acc072d11d45ebe7801459b4e829184ba0934d68027fdc51d327335b53a95a49"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn 2.0.119",
-]
-
 [[package]]
 name = "oxc_allocator"
-version = "0.143.0"
+version = "0.146.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7c603f4ff4617fc04377aa7557396eaa17c77f82e64ffb22947731f75605951f"
+checksum = "064fce871c5cb07e557049ed27c8ca2aa530db797f73424c67e4bb8cfe61175e"
 dependencies = [
  "allocator-api2",
  "hashbrown",
@@ -1000,9 +998,9 @@ dependencies = [
 
 [[package]]
 name = "oxc_ast"
-version = "0.143.0"
+version = "0.146.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cf40d60818cd9ff034774fb371c67d915aa3a6bb0129fdfcb0157a72bda840ff"
+checksum = "a999fd4494b604fc0328fc43443bc1298722500587d87d7e993118bd82c65d7b"
 dependencies = [
  "bitflags",
  "oxc_allocator",
@@ -1018,9 +1016,9 @@ dependencies = [
 
 [[package]]
 name = "oxc_ast_macros"
-version = "0.143.0"
+version = "0.146.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2dd7135befda5e9fab0d549031bf6c0763966bdf596b5429a74c70f0307fcdf5"
+checksum = "d715e3c300c95b1d797b05526567161fd86fcac2ac68235101c61b736f216cde"
 dependencies = [
  "phf",
  "proc-macro2",
@@ -1030,9 +1028,9 @@ dependencies = [
 
 [[package]]
 name = "oxc_ast_visit"
-version = "0.143.0"
+version = "0.146.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a3e2fe96292c0c8752825d95641696be3252be8ddd32a161257cf03874468884"
+checksum = "81b9d77b5c27575ef7d624de1f226caeca3c0d3fcc2347bdaa788d5c4a85512d"
 dependencies = [
  "oxc_allocator",
  "oxc_ast",
@@ -1042,9 +1040,9 @@ dependencies = [
 
 [[package]]
 name = "oxc_codegen"
-version = "0.143.0"
+version = "0.146.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9a945c0ab712d5c14f5962867d9336753f4ef363a69a85a5a9fc7f1a0dcdc2b5"
+checksum = "57b5180ce6f991eacd8c4a85eb28f9fbbff145422dd8ece782f48626957661d0"
 dependencies = [
  "bitflags",
  "cow-utils",
@@ -1063,9 +1061,9 @@ dependencies = [
 
 [[package]]
 name = "oxc_compat"
-version = "0.143.0"
+version = "0.146.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "887da9e634f5d76da0778674a7303d883e103683fcbc7985cecc9114ce4747ca"
+checksum = "bfdfa97a1bb7a8f144937dfb4118ea6e2d681f619c886034f72675b788e1a251"
 dependencies = [
  "cow-utils",
  "oxc-browserslist",
@@ -1186,29 +1184,37 @@ dependencies = [
 
 [[package]]
 name = "oxc_data_structures"
-version = "0.143.0"
+version = "0.146.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fd2aa418d3599ef5e9880d1a359b27bffff242d4a59e0d62ffe08ebf40acdd99"
+checksum = "d15a23b57a931fda6bc9a4fdc3fbabcac6a2edfd0b7216cb7c81432f0e9f54d9"
 dependencies = [
  "ropey",
 ]
 
 [[package]]
 name = "oxc_diagnostics"
-version = "0.143.0"
+version = "0.146.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f3cdd1fcc5edb6d4666ffc82f1647d9784aa15338e671434b8c70211dd44cb66"
+checksum = "f2d0ce1ec51b07b6501eecedd5ab50835b7ebe5c8463cada3b2e6d984d0943af"
 dependencies = [
+ "bytecount",
  "cow-utils",
- "oxc-miette",
+ "itoa",
+ "memchr",
+ "owo-colors",
+ "oxc_span",
  "percent-encoding",
+ "smallvec",
+ "textwrap",
+ "unicode-segmentation",
+ "unicode-width",
 ]
 
 [[package]]
 name = "oxc_ecmascript"
-version = "0.143.0"
+version = "0.146.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "33440685fff66ad5af668cce75130267db8a864938e6433bc264975cd40b2f2c"
+checksum = "8b5d3d07165b7aadcd021f62cd95fb7d62cb6977b8bbfb42fa12adbfb7e75257"
 dependencies = [
  "dragonbox_ecma",
  "itoa",
@@ -1222,9 +1228,9 @@ dependencies = [
 
 [[package]]
 name = "oxc_estree"
-version = "0.143.0"
+version = "0.146.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2267dd438727a1afe72883eb7bf1533511ee713a5ace72cb59ea439f6bc74dca"
+checksum = "fc7af86a59b7aeb2845ffea2cc21ae259053865b175e9ac936a7d72f2744abe5"
 
 [[package]]
 name = "oxc_index"
@@ -1238,9 +1244,9 @@ dependencies = [
 
 [[package]]
 name = "oxc_parser"
-version = "0.143.0"
+version = "0.146.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "74f6b2ea4e4b0538aa7925d98af33a68cc246c1a85d5543a9540cde24101c7e2"
+checksum = "311c29dfdf55ea8bf065cf300b3d0dca5fe1c0fb8059c9ba70a6c98cce75306e"
 dependencies = [
  "bitflags",
  "cow-utils",
@@ -1262,9 +1268,9 @@ dependencies = [
 
 [[package]]
 name = "oxc_regular_expression"
-version = "0.143.0"
+version = "0.146.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dde40ebbc9bd3d9a35fa67e518197a2ef92da71c6a0b1496eb7443b5014f3fa9"
+checksum = "31839a373ad02a37fad54244a3eb710f9a94b5e2e16ca0e1d28a37b4c75b8ebc"
 dependencies = [
  "bitflags",
  "oxc_allocator",
@@ -1279,9 +1285,9 @@ dependencies = [
 
 [[package]]
 name = "oxc_semantic"
-version = "0.143.0"
+version = "0.146.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6d0c6133ad34ad58b9f00ee277fe044e9f47f1c064dd1cb4cf428fce21a8efe5"
+checksum = "366191309f606847936aade62707b06683ed5e0b0c8cb66c27710a61f64a50f1"
 dependencies = [
  "itertools",
  "memchr",
@@ -1315,12 +1321,11 @@ dependencies = [
 
 [[package]]
 name = "oxc_span"
-version = "0.143.0"
+version = "0.146.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0d7e5d38e008df87a3ec92b2c228b8555e6acd56f7befbaff315d4900c3438bb"
+checksum = "c355ae1fa3e865c28cb8a85735ecafd1bb6340a5b880c638d127c1f2d61a98a5"
 dependencies = [
  "compact_str",
- "oxc-miette",
  "oxc_allocator",
  "oxc_ast_macros",
  "oxc_estree",
@@ -1329,9 +1334,9 @@ dependencies = [
 
 [[package]]
 name = "oxc_str"
-version = "0.143.0"
+version = "0.146.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "66064b0255f08443382c4b79cf98d0695ad0a40b62644fe3dc232461afd7b941"
+checksum = "7ba45ef9efa8296e647aa37b2b21936cb520953031edc1ef6352281bbea22faa"
 dependencies = [
  "compact_str",
  "hashbrown",
@@ -1341,9 +1346,9 @@ dependencies = [
 
 [[package]]
 name = "oxc_syntax"
-version = "0.143.0"
+version = "0.146.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fb571d2462c910943c527d0230064702513c7354a63b107aa6d953e46a0696c1"
+checksum = "0970d9be099a082711b574d58add258549580a70fe6546b99a067bbd7ad4a264"
 dependencies = [
  "bitflags",
  "cow-utils",
@@ -1361,9 +1366,9 @@ dependencies = [
 
 [[package]]
 name = "oxc_transformer"
-version = "0.143.0"
+version = "0.146.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a1984c305b3a99c5c4d74b9053132e5751b424d97600c0305ce46e8324304100"
+checksum = "d286f586303c23502786e31959de18c57bfc66299d1f55b9dc2d56c3f4863f6e"
 dependencies = [
  "base64 0.23.1",
  "compact_str",
@@ -1391,9 +1396,9 @@ dependencies = [
 
 [[package]]
 name = "oxc_traverse"
-version = "0.143.0"
+version = "0.146.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "006c6a9163ad8299391c8e8696b4db6b8a6bf140d566b1b169e9554d6cb5f1bf"
+checksum = "f214c06bfb15427400f7c11fe4487ebeb4d5740b0803ff5f1a1c895198e40a30"
 dependencies = [
  "itoa",
  "oxc_allocator",
@@ -1590,7 +1595,7 @@ dependencies = [
  "errno",
  "libc",
  "linux-raw-sys",
- "windows-sys 0.59.0",
+ "windows-sys 0.61.2",
 ]
 
 [[package]]
@@ -1863,7 +1868,7 @@ dependencies = [
  "getrandom 0.4.3",
  "once_cell",
  "rustix",
- "windows-sys 0.59.0",
+ "windows-sys 0.61.2",
 ]
 
 [[package]]
@@ -1996,13 +2001,58 @@ version = "0.11.1+wasi-snapshot-preview1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ccf3ec651a847eb01de73ccad15eb7d99f80485de043efb2f370cd654f4ea44b"
 
+[[package]]
+name = "wasm-bindgen"
+version = "0.2.127"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1b70935747edd64d89de3efa29d73789b806c15798f8e7dca4d8ac356b50ce70"
+dependencies = [
+ "cfg-if",
+ "once_cell",
+ "rustversion",
+ "wasm-bindgen-macro",
+ "wasm-bindgen-shared",
+]
+
+[[package]]
+name = "wasm-bindgen-macro"
+version = "0.2.127"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "77775f8f3f7217702089053b94958f8f54061a3f663417df76e19cbdcca29bc1"
+dependencies = [
+ "quote",
+ "wasm-bindgen-macro-support",
+]
+
+[[package]]
+name = "wasm-bindgen-macro-support"
+version = "0.2.127"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e11d33f857dc2fb11b8bc75aee111aa9cbeb12cd9f25efd3d4c2a3dd4e235284"
+dependencies = [
+ "bumpalo",
+ "proc-macro2",
+ "quote",
+ "syn 2.0.119",
+ "wasm-bindgen-shared",
+]
+
+[[package]]
+name = "wasm-bindgen-shared"
+version = "0.2.127"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7ef64dbcc55df09c7e5a46182d181c2cfa3e925f3da937ea764728b4bbb9dcbf"
+dependencies = [
+ "unicode-ident",
+]
+
 [[package]]
 name = "winapi-util"
 version = "0.1.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c2a7b1c03c876122aa43f3020e6c3c3ee5c05081c9a00739faf7503aeba10d22"
 dependencies = [
- "windows-sys 0.59.0",
+ "windows-sys 0.61.2",
 ]
 
 [[package]]
diff --git a/Cargo.toml b/Cargo.toml
index 4c4efc7..dcacc4c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -55,16 +55,16 @@ napi-derive = "3"
 # Upstream oxc: the parser, AST, semantic and codegen halves of the
 # instrumenter. Oxc gives no stability guarantee between minors, so all nine
 # move together on a bump.
-oxc_allocator = "0.143"
-oxc_ast = "0.143"
-oxc_ast_visit = "0.143"
-oxc_codegen = "0.143"
-oxc_parser = "0.143"
-oxc_semantic = "0.143"
-oxc_span = "0.143"
-oxc_syntax = "0.143"
-oxc_transformer = "0.143"
-oxc_traverse = "0.143"
+oxc_allocator = "0.146"
+oxc_ast = "0.146"
+oxc_ast_visit = "0.146"
+oxc_codegen = "0.146"
+oxc_parser = "0.146"
+oxc_semantic = "0.146"
+oxc_span = "0.146"
+oxc_syntax = "0.146"
+oxc_transformer = "0.146"
+oxc_traverse = "0.146"
 # Independent source map decoder, used in tests to read back the maps the
 # instrumenter emits without going through the srcmap crates under test.
 oxc_sourcemap = "8.0"
diff --git a/crates/oxc_coverage_instrument/src/transform/statements.rs b/crates/oxc_coverage_instrument/src/transform/statements.rs
index a221f74..0d3b506 100644
--- a/crates/oxc_coverage_instrument/src/transform/statements.rs
+++ b/crates/oxc_coverage_instrument/src/transform/statements.rs
@@ -266,7 +266,12 @@ pub(super) fn is_container_statement(stmt: &Statement<'_>) -> bool {
             | Statement::TSTypeAliasDeclaration(_)
             | Statement::TSInterfaceDeclaration(_)
             | Statement::TSEnumDeclaration(_)
-            | Statement::TSModuleDeclaration(_)
+            // Oxc 0.146 split the old combined `TSModuleDeclaration` into
+            // `TSExternalModuleDeclaration` (`declare module 'foo' {}`) and
+            // `TSNamespaceDeclaration` (`namespace Foo {}` / `module Foo {}`).
+            // Both stay containers, as the single node was.
+            | Statement::TSExternalModuleDeclaration(_)
+            | Statement::TSNamespaceDeclaration(_)
             | Statement::TSImportEqualsDeclaration(_)
             | Statement::TSExportAssignment(_)
             | Statement::TSNamespaceExportDeclaration(_)