diff --git a/Cargo.lock b/Cargo.lock
index eed2790a..c88e2223 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -96,15 +96,6 @@ version = "1.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0c4b4d0bd25bd0b74681c0ad21497610ce1b7c91b1022cd21c80c6fbdd9476b0"
 
-[[package]]
-name = "bincode"
-version = "1.3.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b1f45e9417d87227c7a56d22e471c6206462cba514c7590c09aff4cf6d1ddcad"
-dependencies = [
- "serde",
-]
-
 [[package]]
 name = "bindgen"
 version = "0.69.4"
@@ -244,7 +235,7 @@ version = "4.5.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "528131438037fd55894f62d6e9f068b8f45ac57ffa77517819645d10aed04f64"
 dependencies = [
- "heck",
+ "heck 0.5.0",
  "proc-macro2",
  "quote",
  "syn",
@@ -256,6 +247,12 @@ version = "0.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "98cc8fbded0c607b7ba9dd60cd98df59af97e84d24e49c8557331cfc26d301ce"
 
+[[package]]
+name = "cobs"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "67ba02a97a2bd10f4b59b25c7973101c79642302776489e030cd13cdab09ed15"
+
 [[package]]
 name = "colorchoice"
 version = "1.0.1"
@@ -290,18 +287,18 @@ checksum = "06ea2b9bc92be3c2baa9334a323ebca2d6f074ff852cd1d7b11064035cd3868f"
 
 [[package]]
 name = "cranelift-bforest"
-version = "0.106.2"
+version = "0.108.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3b57d4f3ffc28bbd6ef1ca7b50b20126717232f97487efe027d135d9d87eb29c"
+checksum = "29daf137addc15da6bab6eae2c4a11e274b1d270bf2759508e62f6145e863ef6"
 dependencies = [
  "cranelift-entity",
 ]
 
 [[package]]
 name = "cranelift-codegen"
-version = "0.106.2"
+version = "0.108.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d1f7d0ac7fd53f2c29db3ff9a063f6ff5a8be2abaa8f6942aceb6e1521e70df7"
+checksum = "de619867d5de4c644b7fd9904d6e3295269c93d8a71013df796ab338681222d4"
 dependencies = [
  "bumpalo",
  "cranelift-bforest",
@@ -314,39 +311,40 @@ dependencies = [
  "hashbrown 0.14.5",
  "log",
  "regalloc2",
+ "rustc-hash",
  "smallvec",
  "target-lexicon",
 ]
 
 [[package]]
 name = "cranelift-codegen-meta"
-version = "0.106.2"
+version = "0.108.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b40bf21460a600178956cb7fd900a7408c6587fbb988a8063f7215361801a1da"
+checksum = "29f5cf277490037d8dae9513d35e0ee8134670ae4a964a5ed5b198d4249d7c10"
 dependencies = [
  "cranelift-codegen-shared",
 ]
 
 [[package]]
 name = "cranelift-codegen-shared"
-version = "0.106.2"
+version = "0.108.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d792ecc1243b7ebec4a7f77d9ed428ef27456eeb1f8c780587a6f5c38841be19"
+checksum = "8c3e22ecad1123343a3c09ac6ecc532bb5c184b6fcb7888df0ea953727f79924"
 
 [[package]]
 name = "cranelift-control"
-version = "0.106.2"
+version = "0.108.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cea2808043df964b73ad7582e09afbbe06a31f3fb9db834d53e74b4e16facaeb"
+checksum = "53ca3ec6d30bce84ccf59c81fead4d16381a3ef0ef75e8403bc1e7385980da09"
 dependencies = [
  "arbitrary",
 ]
 
 [[package]]
 name = "cranelift-entity"
-version = "0.106.2"
+version = "0.108.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f1930946836da6f514da87625cd1a0331f3908e0de454628c24a0b97b130c4d4"
+checksum = "7eabb8d36b0ca8906bec93c78ea516741cac2d7e6b266fa7b0ffddcc09004990"
 dependencies = [
  "serde",
  "serde_derive",
@@ -354,9 +352,9 @@ dependencies = [
 
 [[package]]
 name = "cranelift-frontend"
-version = "0.106.2"
+version = "0.108.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5482a5fcdf98f2f31b21093643bdcfe9030866b8be6481117022e7f52baa0f2b"
+checksum = "44b42630229e49a8cfcae90bdc43c8c4c08f7a7aa4618b67f79265cd2f996dd2"
 dependencies = [
  "cranelift-codegen",
  "log",
@@ -366,15 +364,15 @@ dependencies = [
 
 [[package]]
 name = "cranelift-isle"
-version = "0.106.2"
+version = "0.108.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6f6e1869b6053383bdb356900e42e33555b4c9ebee05699469b7c53cdafc82ea"
+checksum = "918d1e36361805dfe0b6cdfd5a5ffdb5d03fa796170c5717d2727cbe623b93a0"
 
 [[package]]
 name = "cranelift-native"
-version = "0.106.2"
+version = "0.108.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a91446e8045f1c4bc164b7bba68e2419c623904580d4b730877a663c6da38964"
+checksum = "75aea85a0d7e1800b14ce9d3f53adf8ad4d1ee8a9e23b0269bdc50285e93b9b3"
 dependencies = [
  "cranelift-codegen",
  "libc",
@@ -383,9 +381,9 @@ dependencies = [
 
 [[package]]
 name = "cranelift-wasm"
-version = "0.106.2"
+version = "0.108.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f8b17979b862d3b0d52de6ae3294ffe4d86c36027b56ad0443a7c8c8f921d14f"
+checksum = "dac491fd3473944781f0cf9528c90cc899d18ad438da21961a839a3a44d57dfb"
 dependencies = [
  "cranelift-codegen",
  "cranelift-entity",
@@ -393,7 +391,7 @@ dependencies = [
  "itertools",
  "log",
  "smallvec",
- "wasmparser 0.201.0",
+ "wasmparser 0.207.0",
  "wasmtime-types",
 ]
 
@@ -459,6 +457,12 @@ version = "1.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3dca9240753cf90908d7e4aac30f630662b02aebaa1b58a3cadabdb23385b58b"
 
+[[package]]
+name = "embedded-io"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ef1a6892d9eef45c8fa6b9e0086428a2cca8491aca8f787c534a3d6d0bcb3ced"
+
 [[package]]
 name = "equivalent"
 version = "1.0.1"
@@ -579,6 +583,12 @@ dependencies = [
  "ahash",
 ]
 
+[[package]]
+name = "heck"
+version = "0.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "95505c38b4572b2d910cecb0281560f54b440a19336cbbcb27bf6ce6adc6f5a8"
+
 [[package]]
 name = "heck"
 version = "0.5.0"
@@ -609,6 +619,12 @@ version = "1.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "df3b46402a9d5adb4c86a0cf463f42e19994e3ee891101b1841f30a545cb49a9"
 
+[[package]]
+name = "id-arena"
+version = "2.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "25a2bc672d1148e28034f176e01fffebb08b35768468cc954630da77a1449005"
+
 [[package]]
 name = "idna"
 version = "0.5.0"
@@ -745,6 +761,12 @@ dependencies = [
  "windows-targets 0.52.5",
 ]
 
+[[package]]
+name = "libm"
+version = "0.2.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4ec2a862134d2a7d32d7983ddcdd1c4923530833c9f2ea1a44fc5fa473989058"
+
 [[package]]
 name = "libredox"
 version = "0.1.3"
@@ -794,10 +816,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "90ed8c1e510134f979dbc4f070f87d4313098b704861a105fe34231c70a3901c"
 
 [[package]]
-name = "mach"
-version = "0.3.2"
+name = "mach2"
+version = "0.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b823e83b2affd8f40a9ee8c29dbc56404c1e34cd2710921f2801e2cf29527afa"
+checksum = "19b955cdeb2a02b9117f121ce63aa52d08ade45de53e48fe6a38b39c10f6f709"
 dependencies = [
  "libc",
 ]
@@ -896,9 +918,9 @@ dependencies = [
 
 [[package]]
 name = "object"
-version = "0.32.2"
+version = "0.33.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a6a622008b6e321afc04970976f62ee297fdbaa6f95318ca343e3eebb9648441"
+checksum = "d8dd6c0cdf9429bce006e1362bfce61fa1bfd8c898a643ed8d2b471934701d3d"
 dependencies = [
  "crc32fast",
  "hashbrown 0.14.5",
@@ -960,6 +982,17 @@ version = "0.3.30"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d231b230927b5e4ad203db57bbcbee2802f6bce620b1e4a9024a07d94e2907ec"
 
+[[package]]
+name = "postcard"
+version = "1.0.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a55c51ee6c0db07e68448e336cf8ea4131a620edefebf9893e759b2d793420f8"
+dependencies = [
+ "cobs",
+ "embedded-io",
+ "serde",
+]
+
 [[package]]
 name = "ppv-lite86"
 version = "0.2.17"
@@ -1215,6 +1248,9 @@ name = "smallvec"
 version = "1.13.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3c5e1a9a646d36c3599cd173a41282daf47c44583ad367b8e6837255952e5c67"
+dependencies = [
+ "serde",
+]
 
 [[package]]
 name = "sptr"
@@ -1398,7 +1434,7 @@ dependencies = [
  "dirs",
  "filetime",
  "glob",
- "heck",
+ "heck 0.5.0",
  "html-escape",
  "indexmap",
  "indoc",
@@ -1516,6 +1552,12 @@ dependencies = [
  "tinyvec",
 ]
 
+[[package]]
+name = "unicode-xid"
+version = "0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f962df74c8c05a667b5ee8bcf162993134c104e96440b663c8daa176dc772d8c"
+
 [[package]]
 name = "unindent"
 version = "0.2.3"
@@ -1629,24 +1671,13 @@ checksum = "af190c94f2773fdb3729c55b007a722abb5384da03bc0986df4c289bf5567e96"
 
 [[package]]
 name = "wasm-encoder"
-version = "0.201.0"
+version = "0.207.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b9c7d2731df60006819b013f64ccc2019691deccf6e11a1804bc850cd6748f1a"
+checksum = "d996306fb3aeaee0d9157adbe2f670df0236caf19f6728b221e92d0f27b3fe17"
 dependencies = [
  "leb128",
 ]
 
-[[package]]
-name = "wasmparser"
-version = "0.201.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "84e5df6dba6c0d7fafc63a450f1738451ed7a0b52295d83e868218fa286bf708"
-dependencies = [
- "bitflags 2.5.0",
- "indexmap",
- "semver",
-]
-
 [[package]]
 name = "wasmparser"
 version = "0.206.0"
@@ -1661,50 +1692,82 @@ dependencies = [
 ]
 
 [[package]]
-name = "wasmtime"
-version = "19.0.2"
+name = "wasmparser"
+version = "0.207.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4e300c0e3f19dc9064e3b17ce661088646c70dbdde36aab46470ed68ba58db7d"
+checksum = "e19bb9f8ab07616da582ef8adb24c54f1424c7ec876720b7da9db8ec0626c92c"
+dependencies = [
+ "ahash",
+ "bitflags 2.5.0",
+ "hashbrown 0.14.5",
+ "indexmap",
+ "semver",
+]
+
+[[package]]
+name = "wasmprinter"
+version = "0.207.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9c2d8a7b4dabb460208e6b4334d9db5766e84505038b2529e69c3d07ac619115"
+dependencies = [
+ "anyhow",
+ "wasmparser 0.207.0",
+]
+
+[[package]]
+name = "wasmtime"
+version = "21.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f92a1370c66a0022e6d92dcc277e2c84f5dece19569670b8ce7db8162560d8b6"
 dependencies = [
  "anyhow",
- "bincode",
  "bumpalo",
+ "cc",
  "cfg-if",
- "gimli",
+ "hashbrown 0.14.5",
  "indexmap",
  "libc",
+ "libm",
  "log",
+ "mach2",
+ "memfd",
+ "memoffset",
  "object",
  "once_cell",
  "paste",
+ "postcard",
+ "psm",
  "rustix",
  "serde",
  "serde_derive",
- "serde_json",
+ "smallvec",
+ "sptr",
  "target-lexicon",
- "wasmparser 0.201.0",
+ "wasmparser 0.207.0",
+ "wasmtime-asm-macros",
+ "wasmtime-component-macro",
  "wasmtime-cranelift",
  "wasmtime-environ",
  "wasmtime-jit-icache-coherence",
- "wasmtime-runtime",
  "wasmtime-slab",
+ "wasmtime-versioned-export-macros",
  "windows-sys 0.52.0",
 ]
 
 [[package]]
 name = "wasmtime-asm-macros"
-version = "19.0.2"
+version = "21.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "110aa598e02a136fb095ca70fa96367fc16bab55256a131e66f9b58f16c73daf"
+checksum = "6dee8679c974a7f258c03d60d3c747c426ed219945b6d08cbc77fd2eab15b2d1"
 dependencies = [
  "cfg-if",
 ]
 
 [[package]]
 name = "wasmtime-c-api-impl"
-version = "19.0.2"
+version = "21.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "be684dae96dc2d371317848f352135333fcefc3483b67ade73031f9cdbbae52e"
+checksum = "76af8b62c8d2814b7d5975c5dc140122e4c086150db6c15d25a4b76f11c929dd"
 dependencies = [
  "anyhow",
  "log",
@@ -1716,19 +1779,40 @@ dependencies = [
 
 [[package]]
 name = "wasmtime-c-api-macros"
-version = "19.0.2"
+version = "21.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ab36d96e82e247a44b0500d8e1ccc103da5d24da017f5466d0d8cb6a1b2383f8"
+checksum = "d74b92f917c9ced9c6262a00e9cb982ebac183e6900b4d44e2480f936b9495eb"
 dependencies = [
  "proc-macro2",
  "quote",
 ]
 
 [[package]]
-name = "wasmtime-cranelift"
-version = "19.0.2"
+name = "wasmtime-component-macro"
+version = "21.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e923262451a4b5b39fe02f69f1338d56356db470e289ea1887346b9c7f592738"
+checksum = "32cae30035f1cf97dcc6657c979cf39f99ce6be93583675eddf4aeaa5548509c"
+dependencies = [
+ "anyhow",
+ "proc-macro2",
+ "quote",
+ "syn",
+ "wasmtime-component-util",
+ "wasmtime-wit-bindgen",
+ "wit-parser",
+]
+
+[[package]]
+name = "wasmtime-component-util"
+version = "21.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f7ae611f08cea620c67330925be28a96115bf01f8f393a6cbdf4856a86087134"
+
+[[package]]
+name = "wasmtime-cranelift"
+version = "21.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b2909406a6007e28be964067167890bca4574bd48a9ff18f1fa9f4856d89ea40"
 dependencies = [
  "anyhow",
  "cfg-if",
@@ -1743,111 +1827,69 @@ dependencies = [
  "object",
  "target-lexicon",
  "thiserror",
- "wasmparser 0.201.0",
- "wasmtime-cranelift-shared",
+ "wasmparser 0.207.0",
  "wasmtime-environ",
  "wasmtime-versioned-export-macros",
 ]
 
-[[package]]
-name = "wasmtime-cranelift-shared"
-version = "19.0.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "508898cbbea0df81a5d29cfc1c7c72431a1bc4c9e89fd9514b4c868474c05c7a"
-dependencies = [
- "anyhow",
- "cranelift-codegen",
- "cranelift-control",
- "cranelift-native",
- "gimli",
- "object",
- "target-lexicon",
- "wasmtime-environ",
-]
-
 [[package]]
 name = "wasmtime-environ"
-version = "19.0.2"
+version = "21.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d7e3f2aa72dbb64c19708646e1ff97650f34e254598b82bad5578ea9c80edd30"
+checksum = "40e227f9ed2f5421473723d6c0352b5986e6e6044fde5410a274a394d726108f"
 dependencies = [
  "anyhow",
- "bincode",
  "cranelift-entity",
  "gimli",
  "indexmap",
  "log",
  "object",
+ "postcard",
  "serde",
  "serde_derive",
  "target-lexicon",
- "thiserror",
- "wasmparser 0.201.0",
+ "wasm-encoder",
+ "wasmparser 0.207.0",
+ "wasmprinter",
  "wasmtime-types",
 ]
 
 [[package]]
 name = "wasmtime-jit-icache-coherence"
-version = "19.0.2"
+version = "21.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c22ca2ef4d87b23d400660373453e274b2251bc2d674e3102497f690135e04b0"
-dependencies = [
- "cfg-if",
- "libc",
- "windows-sys 0.52.0",
-]
-
-[[package]]
-name = "wasmtime-runtime"
-version = "19.0.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1806ee242ca4fd183309b7406e4e83ae7739b7569f395d56700de7c7ef9f5eb8"
+checksum = "afe088f9b56bb353adaf837bf7e10f1c2e1676719dd5be4cac8e37f2ba1ee5bc"
 dependencies = [
  "anyhow",
- "cc",
  "cfg-if",
- "indexmap",
  "libc",
- "log",
- "mach",
- "memfd",
- "memoffset",
- "paste",
- "psm",
- "rustix",
- "sptr",
- "wasm-encoder",
- "wasmtime-asm-macros",
- "wasmtime-environ",
- "wasmtime-versioned-export-macros",
- "wasmtime-wmemcheck",
  "windows-sys 0.52.0",
 ]
 
 [[package]]
 name = "wasmtime-slab"
-version = "19.0.2"
+version = "21.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "20c58bef9ce877fd06acb58f08d003af17cb05cc51225b455e999fbad8e584c0"
+checksum = "4ff75cafffe47b04b036385ce3710f209153525b0ed19d57b0cf44a22d446460"
 
 [[package]]
 name = "wasmtime-types"
-version = "19.0.2"
+version = "21.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cebe297aa063136d9d2e5b347c1528868aa43c2c8d0e1eb0eec144567e38fe0f"
+checksum = "2f2fa462bfea3220711c84e2b549f147e4df89eeb49b8a2a3d89148f6cc4a8b1"
 dependencies = [
  "cranelift-entity",
  "serde",
  "serde_derive",
- "thiserror",
- "wasmparser 0.201.0",
+ "smallvec",
+ "wasmparser 0.207.0",
 ]
 
 [[package]]
 name = "wasmtime-versioned-export-macros"
-version = "19.0.2"
+version = "21.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ffaafa5c12355b1a9ee068e9295d50c4ca0a400c721950cdae4f5b54391a2da5"
+checksum = "d4cedc5bfef3db2a85522ee38564b47ef3b7fc7c92e94cacbce99808e63cdd47"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -1855,10 +1897,16 @@ dependencies = [
 ]
 
 [[package]]
-name = "wasmtime-wmemcheck"
-version = "19.0.2"
+name = "wasmtime-wit-bindgen"
+version = "21.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c9a8c62e9df8322b2166d2a6f096fbec195ddb093748fd74170dcf25ef596769"
+checksum = "c936a52ce69c28de2aa3b5fb4f2dbbb2966df304f04cccb7aca4ba56d915fda0"
+dependencies = [
+ "anyhow",
+ "heck 0.4.1",
+ "indexmap",
+ "wit-parser",
+]
 
 [[package]]
 name = "web-sys"
@@ -2123,6 +2171,24 @@ dependencies = [
  "memchr",
 ]
 
+[[package]]
+name = "wit-parser"
+version = "0.207.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "78c83dab33a9618d86cfe3563cc864deffd08c17efc5db31a3b7cd1edeffe6e1"
+dependencies = [
+ "anyhow",
+ "id-arena",
+ "indexmap",
+ "log",
+ "semver",
+ "serde",
+ "serde_derive",
+ "serde_json",
+ "unicode-xid",
+ "wasmparser 0.207.0",
+]
+
 [[package]]
 name = "xtask"
 version = "0.1.0"
diff --git a/lib/Cargo.toml b/lib/Cargo.toml
index 8db62ce7..870f5c2d 100644
--- a/lib/Cargo.toml
+++ b/lib/Cargo.toml
@@ -33,7 +33,7 @@ regex.workspace = true
 tree-sitter-language = { version = "0.1", path = "language" }
 
 [dependencies.wasmtime-c-api]
-version = "19"
+version = "21.0.1"
 optional = true
 package = "wasmtime-c-api-impl"
 default-features = false
diff --git a/lib/binding_rust/build.rs b/lib/binding_rust/build.rs
index ce4198bc..e7a4b1eb 100644
--- a/lib/binding_rust/build.rs
+++ b/lib/binding_rust/build.rs
@@ -19,8 +19,7 @@ fn main() {
         config
             .define("TREE_SITTER_FEATURE_WASM", "")
             .define("static_assert(...)", "")
-            .include(env::var("DEP_WASMTIME_C_API_INCLUDE").unwrap())
-            .include(env::var("DEP_WASMTIME_C_API_WASM_INCLUDE").unwrap());
+            .include(env::var("DEP_WASMTIME_C_API_INCLUDE").unwrap());
     }
 
     let manifest_path = PathBuf::from(env::var("CARGO_MANIFEST_DIR").unwrap());
diff --git a/lib/src/wasm_store.c b/lib/src/wasm_store.c
index 374c352d..b3455fc6 100644
--- a/lib/src/wasm_store.c
+++ b/lib/src/wasm_store.c
@@ -4,16 +4,17 @@
 
 #ifdef TREE_SITTER_FEATURE_WASM
 
-#include <wasmtime.h>
-#include <wasm.h>
-#include <string.h>
 #include "./alloc.h"
 #include "./array.h"
 #include "./atomic.h"
 #include "./language.h"
 #include "./lexer.h"
-#include "./wasm_store.h"
 #include "./wasm/wasm-stdlib.h"
+#include "./wasm_store.h"
+
+#include <string.h>
+#include <wasm.h>
+#include <wasmtime.h>
 
 #define array_len(a) (sizeof(a) / sizeof(a[0]))
 
@@ -457,7 +458,7 @@ static wasmtime_extern_t get_builtin_extern(
     .kind = WASMTIME_EXTERN_FUNC,
     .of.func = (wasmtime_func_t) {
       .store_id = table->store_id,
-      .index = index
+      .__private = index
     }
   };
 }
@@ -634,14 +635,14 @@ TSWasmStore *ts_wasm_store_new(TSWasmEngine *engine, TSWasmError *wasm_error) {
     FunctionDefinition *definition = &builtin_definitions[i];
     wasmtime_func_t func;
     wasmtime_func_new_unchecked(context, definition->type, definition->callback, self, NULL, &func);
-    *definition->storage_location = func.index;
+    *definition->storage_location = func.__private;
     wasm_functype_delete(definition->type);
   }
   for (unsigned i = 0; i < lexer_definitions_len; i++) {
     FunctionDefinition *definition = &lexer_definitions[i];
     wasmtime_func_t func;
     wasmtime_func_new_unchecked(context, definition->type, definition->callback, self, NULL, &func);
-    *definition->storage_location = func.index;
+    *definition->storage_location = func.__private;
     wasm_functype_delete(definition->type);
   }
 
@@ -824,13 +825,13 @@ TSWasmStore *ts_wasm_store_new(TSWasmEngine *engine, TSWasmError *wasm_error) {
       }
 
       if (name_eq(name, "reset_heap")) {
-        self->builtin_fn_indices.reset_heap = export.of.func.index;
+        self->builtin_fn_indices.reset_heap = export.of.func.__private;
         continue;
       }
 
       for (unsigned j = 0; j < stdlib_symbols_len; j++) {
         if (name_eq(name, STDLIB_SYMBOLS[j])) {
-          self->stdlib_fn_indices[j] = export.of.func.index;
+          self->stdlib_fn_indices[j] = export.of.func.__private;
           break;
         }
       }