diff --git a/.github/actions/setup-rust-stellar/action.yml b/.github/actions/setup-rust-stellar/action.yml
index 0f39847..05f37c8 100644
--- a/.github/actions/setup-rust-stellar/action.yml
+++ b/.github/actions/setup-rust-stellar/action.yml
@@ -18,10 +18,10 @@ runs:
 
     - name: Install Stellar CLI
       run: |
-        STELLAR_VERSION="23.1.3"
+        STELLAR_VERSION="27.0.0"
         STELLAR_TAR="stellar-cli-${STELLAR_VERSION}-x86_64-unknown-linux-gnu.tar.gz"
-        # Official SHA-256 from https://github.com/stellar/stellar-cli/releases/tag/v23.1.3
-        STELLAR_SHA256="cca0a9e249176b15ac2d63a394b383c0699dd59cd52b67cd9593427f0d039d87"
+        # Official SHA-256 from https://github.com/stellar/stellar-cli/releases/tag/v27.0.0
+        STELLAR_SHA256="357bf712f6353c28cd33c794402a3c87231757a5b305e6ef1604365af4fdd556"
 
         wget -q "https://github.com/stellar/stellar-cli/releases/download/v${STELLAR_VERSION}/${STELLAR_TAR}"
 
diff --git a/.github/workflows/verify-build.yml b/.github/workflows/verify-build.yml
index 8345dad..04f5548 100644
--- a/.github/workflows/verify-build.yml
+++ b/.github/workflows/verify-build.yml
@@ -7,6 +7,10 @@ on:
       - testnet
     paths:
       - 'contracts/**'
+      - 'Cargo.toml'
+      - 'Cargo.lock'
+      - 'rust-toolchain.toml'
+      - '.github/actions/setup-rust-stellar/**'
       - '.github/workflows/verify-build.yml'
   # Use pull_request (not pull_request_target): the check must run the workflow
   # from the PR head so branch-filter changes take effect on the PR itself, and
@@ -19,6 +23,10 @@ on:
       - testnet
     paths:
       - 'contracts/**'
+      - 'Cargo.toml'
+      - 'Cargo.lock'
+      - 'rust-toolchain.toml'
+      - '.github/actions/setup-rust-stellar/**'
       - '.github/workflows/verify-build.yml'
       - '.github/workflows/rustfmt.yml'
   workflow_dispatch:
diff --git a/CLAUDE.md b/CLAUDE.md
index 271ee61..f6a2538 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -28,7 +28,7 @@ Source: <https://github.com/stellar/stellar-dev-skill>
 
 ```bash
 # Build
-cd contracts/events && cargo build --target wasm32-unknown-unknown --release
+cd contracts/events && cargo build --target wasm32v1-none --release
 
 # Test (host target)
 cargo test -p boundless-events
@@ -46,7 +46,7 @@ Mainnet admin operations live behind the multi-sig defined in `docs/admin-custod
 
 ```bash
 cargo test -p boundless-events
-cargo build --release --target wasm32-unknown-unknown
+cargo build --release --target wasm32v1-none
 ```
 
 Update `BACKLOG.md` if your PR closes one of the entries there.
diff --git a/Cargo.lock b/Cargo.lock
index 35414ea..9e720e6 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -14,6 +14,12 @@ dependencies = [
  "zerocopy",
 ]
 
+[[package]]
+name = "allocator-api2"
+version = "0.2.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "683d7910e743518b0e34f1186f92494becacb047c7b6bf616c96772180fef923"
+
 [[package]]
 name = "android_system_properties"
 version = "0.1.5"
@@ -34,9 +40,9 @@ dependencies = [
 
 [[package]]
 name = "ark-bls12-381"
-version = "0.4.0"
+version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c775f0d12169cba7aae4caeb547bb6a50781c7449a8aa53793827c9ec4abf488"
+checksum = "3df4dcc01ff89867cd86b0da835f23c3f02738353aaee7dde7495af71363b8d5"
 dependencies = [
  "ark-ec",
  "ark-ff",
@@ -44,112 +50,136 @@ dependencies = [
  "ark-std",
 ]
 
+[[package]]
+name = "ark-bn254"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d69eab57e8d2663efa5c63135b2af4f396d66424f88954c21104125ab6b3e6bc"
+dependencies = [
+ "ark-ec",
+ "ark-ff",
+ "ark-std",
+]
+
 [[package]]
 name = "ark-ec"
-version = "0.4.2"
+version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "defd9a439d56ac24968cca0571f598a61bc8c55f71d50a89cda591cb750670ba"
+checksum = "43d68f2d516162846c1238e755a7c4d131b892b70cc70c471a8e3ca3ed818fce"
 dependencies = [
+ "ahash",
  "ark-ff",
  "ark-poly",
  "ark-serialize",
  "ark-std",
- "derivative",
- "hashbrown 0.13.2",
+ "educe",
+ "fnv",
+ "hashbrown 0.15.5",
  "itertools",
+ "num-bigint",
+ "num-integer",
  "num-traits",
  "zeroize",
 ]
 
 [[package]]
 name = "ark-ff"
-version = "0.4.2"
+version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ec847af850f44ad29048935519032c33da8aa03340876d351dfab5660d2966ba"
+checksum = "a177aba0ed1e0fbb62aa9f6d0502e9b46dad8c2eab04c14258a1212d2557ea70"
 dependencies = [
  "ark-ff-asm",
  "ark-ff-macros",
  "ark-serialize",
  "ark-std",
- "derivative",
+ "arrayvec",
  "digest",
+ "educe",
  "itertools",
  "num-bigint",
  "num-traits",
  "paste",
- "rustc_version",
  "zeroize",
 ]
 
 [[package]]
 name = "ark-ff-asm"
-version = "0.4.2"
+version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3ed4aa4fe255d0bc6d79373f7e31d2ea147bcf486cba1be5ba7ea85abdb92348"
+checksum = "62945a2f7e6de02a31fe400aa489f0e0f5b2502e69f95f853adb82a96c7a6b60"
 dependencies = [
  "quote",
- "syn 1.0.109",
+ "syn",
 ]
 
 [[package]]
 name = "ark-ff-macros"
-version = "0.4.2"
+version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7abe79b0e4288889c4574159ab790824d0033b9fdcb2a112a3182fac2e514565"
+checksum = "09be120733ee33f7693ceaa202ca41accd5653b779563608f1234f78ae07c4b3"
 dependencies = [
  "num-bigint",
  "num-traits",
  "proc-macro2",
  "quote",
- "syn 1.0.109",
+ "syn",
 ]
 
 [[package]]
 name = "ark-poly"
-version = "0.4.2"
+version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d320bfc44ee185d899ccbadfa8bc31aab923ce1558716e1997a1e74057fe86bf"
+checksum = "579305839da207f02b89cd1679e50e67b4331e2f9294a57693e5051b7703fe27"
 dependencies = [
+ "ahash",
  "ark-ff",
  "ark-serialize",
  "ark-std",
- "derivative",
- "hashbrown 0.13.2",
+ "educe",
+ "fnv",
+ "hashbrown 0.15.5",
 ]
 
 [[package]]
 name = "ark-serialize"
-version = "0.4.2"
+version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "adb7b85a02b83d2f22f89bd5cac66c9c89474240cb6207cb1efc16d098e822a5"
+checksum = "3f4d068aaf107ebcd7dfb52bc748f8030e0fc930ac8e360146ca54c1203088f7"
 dependencies = [
  "ark-serialize-derive",
  "ark-std",
+ "arrayvec",
  "digest",
  "num-bigint",
 ]
 
 [[package]]
 name = "ark-serialize-derive"
-version = "0.4.2"
+version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ae3281bc6d0fd7e549af32b52511e1302185bd688fd3359fa36423346ff682ea"
+checksum = "213888f660fddcca0d257e88e54ac05bca01885f258ccdf695bafd77031bb69d"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 1.0.109",
+ "syn",
 ]
 
 [[package]]
 name = "ark-std"
-version = "0.4.0"
+version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "94893f1e0c6eeab764ade8dc4c0db24caf4fe7cbbaafc0eba0a9030f447b5185"
+checksum = "246a225cc6131e9ee4f24619af0f19d67761fff15d7ccc22e42b80846e69449a"
 dependencies = [
  "num-traits",
  "rand",
 ]
 
+[[package]]
+name = "arrayvec"
+version = "0.7.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d3fb67a6e08acf24fdeccbac2cb6ac4305825bd1f117462e0e6f2f193345ad56"
+
 [[package]]
 name = "autocfg"
 version = "1.5.0"
@@ -212,14 +242,14 @@ checksum = "1fd0f2584146f6f2ef48085050886acf353beff7305ebd1ae69500e27c67f64b"
 
 [[package]]
 name = "bytes-lit"
-version = "0.0.5"
+version = "0.0.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0adabf37211a5276e46335feabcbb1530c95eb3fdf85f324c7db942770aa025d"
+checksum = "9b04f2b1d34cb428043f14aa4c853d14294532e8bbde3b6a3bc2faaaae31a1dd"
 dependencies = [
  "num-bigint",
  "proc-macro2",
  "quote",
- "syn 2.0.106",
+ "syn",
 ]
 
 [[package]]
@@ -246,7 +276,7 @@ checksum = "45565fc9416b9896014f5732ac776f810ee53a66730c17e4020c3ec064a8f88f"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.106",
+ "syn",
 ]
 
 [[package]]
@@ -293,6 +323,17 @@ dependencies = [
  "serde_json",
 ]
 
+[[package]]
+name = "crate-git-revision"
+version = "0.0.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "54851b5b3f24621804b1cded2820975623c205e3055d2d44031cdb1237339ac8"
+dependencies = [
+ "serde",
+ "serde_derive",
+ "serde_json",
+]
+
 [[package]]
 name = "crypto-bigint"
 version = "0.5.5"
@@ -355,7 +396,7 @@ checksum = "f46882e17999c6cc590af592290432be3bce0428cb0d5f8b6715e4dc7b383eb3"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.106",
+ "syn",
 ]
 
 [[package]]
@@ -389,7 +430,7 @@ dependencies = [
  "proc-macro2",
  "quote",
  "strsim",
- "syn 2.0.106",
+ "syn",
 ]
 
 [[package]]
@@ -403,7 +444,7 @@ dependencies = [
  "proc-macro2",
  "quote",
  "strsim",
- "syn 2.0.106",
+ "syn",
 ]
 
 [[package]]
@@ -414,7 +455,7 @@ checksum = "fc34b93ccb385b40dc71c6fceac4b2ad23662c7eeb248cf10d529b7e055b6ead"
 dependencies = [
  "darling_core 0.20.11",
  "quote",
- "syn 2.0.106",
+ "syn",
 ]
 
 [[package]]
@@ -425,7 +466,7 @@ checksum = "d38308df82d1080de0afee5d069fa14b0326a88c14f15c5ccda35b4a6c414c81"
 dependencies = [
  "darling_core 0.21.3",
  "quote",
- "syn 2.0.106",
+ "syn",
 ]
 
 [[package]]
@@ -454,17 +495,6 @@ dependencies = [
  "serde_core",
 ]
 
-[[package]]
-name = "derivative"
-version = "2.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fcc3dd5e9e9c0b295d6e1e4d811fb6f157d5ffd784b8d202fc62eac8035a770b"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn 1.0.109",
-]
-
 [[package]]
 name = "derive_arbitrary"
 version = "1.3.2"
@@ -473,7 +503,7 @@ checksum = "67e77553c4162a157adbf834ebae5b415acbecbeafc7a74b0e886657506a7611"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.106",
+ "syn",
 ]
 
 [[package]]
@@ -553,6 +583,18 @@ dependencies = [
  "zeroize",
 ]
 
+[[package]]
+name = "educe"
+version = "0.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1d7bc049e1bd8cdeb31b68bbd586a9464ecf9f3944af3958a7a9d0f8b9799417"
+dependencies = [
+ "enum-ordinalize",
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "either"
 version = "1.15.0"
@@ -577,6 +619,26 @@ dependencies = [
  "zeroize",
 ]
 
+[[package]]
+name = "enum-ordinalize"
+version = "4.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "07f808d588c10e464ea6f7d3eaed500049eff30aaac103460f61828c2d65b3eb"
+dependencies = [
+ "enum-ordinalize-derive",
+]
+
+[[package]]
+name = "enum-ordinalize-derive"
+version = "4.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "42e528e2d34ba8a67a1a650b86beae8ef69fc5fdb638016f386b973226590432"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "equivalent"
 version = "1.0.2"
@@ -591,9 +653,9 @@ checksum = "2bfcf67fea2815c2fc3b90873fae90957be12ff417335dfadc7f52927feb03b2"
 
 [[package]]
 name = "ethnum"
-version = "1.5.2"
+version = "1.5.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ca81e6b4777c89fd810c25a4be2b1bd93ea034fbe58e6a75216a34c6b82c539b"
+checksum = "40404c3f5f511ec4da6fe866ddf6a717c309fdbb69fbbad7b0f3edab8f2e835f"
 
 [[package]]
 name = "ff"
@@ -675,11 +737,11 @@ checksum = "8a9ee70c43aaf417c914396645a0fa852624801b24ebb7ae78fe8272889ac888"
 
 [[package]]
 name = "hashbrown"
-version = "0.13.2"
+version = "0.15.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "43a3c133739dddd0d2990f9a4bdf8eb4b21ef50e4851ca85ab661199821d510e"
+checksum = "9229cfe53dfd69f0609a49f65461bd93001ea1ef889cd5529dd176593f5338a1"
 dependencies = [
- "ahash",
+ "allocator-api2",
 ]
 
 [[package]]
@@ -789,9 +851,9 @@ checksum = "8e04e2fd2b8188ea827b32ef11de88377086d690286ab35747ef7f9bf3ccb590"
 
 [[package]]
 name = "itertools"
-version = "0.10.5"
+version = "0.13.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b0fd2260e829bddf4cb6ea802289de2f86d6a7a690192fbe91b3f46e0f2c8473"
+checksum = "413ee7dfc52ee1a4949ceeb7dbc8a33f2d6c088194d9f922fb8318faf1f01186"
 dependencies = [
  "either",
 ]
@@ -859,7 +921,7 @@ checksum = "1b27834086c65ec3f9387b096d66e99f221cf081c2b738042aa252bcd41204e3"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.106",
+ "syn",
 ]
 
 [[package]]
@@ -892,7 +954,7 @@ checksum = "ed3955f1a9c7c0c15e092f9c887db08b1fc683305fdf6eb6684f22555355e202"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.106",
+ "syn",
 ]
 
 [[package]]
@@ -969,7 +1031,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "479ca8adacdd7ce8f1fb39ce9ecccbfe93a3f1344b3d0d97f20bc0196208f62b"
 dependencies = [
  "proc-macro2",
- "syn 2.0.106",
+ "syn",
 ]
 
 [[package]]
@@ -1046,7 +1108,7 @@ checksum = "b7186006dcb21920990093f30e3dea63b7d6e977bf1256be20c3563a5db070da"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.106",
+ "syn",
 ]
 
 [[package]]
@@ -1161,7 +1223,7 @@ checksum = "d540f220d3187173da220f885ab66608367b6574e925011a9353e4badda91d79"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.106",
+ "syn",
 ]
 
 [[package]]
@@ -1207,7 +1269,7 @@ dependencies = [
  "darling 0.21.3",
  "proc-macro2",
  "quote",
- "syn 2.0.106",
+ "syn",
 ]
 
 [[package]]
@@ -1255,24 +1317,24 @@ checksum = "67b1b7a3b5fe4f1376887184045fcf45c69e92af734b7aaddc05fb777b6fbd03"
 
 [[package]]
 name = "soroban-builtin-sdk-macros"
-version = "23.0.1"
+version = "27.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d9336adeabcd6f636a4e0889c8baf494658ef5a3c4e7e227569acd2ce9091e85"
+checksum = "d769030e3b2c27873e9be4931decbbe79787b943d5b30e31f8c395eae83144b8"
 dependencies = [
  "itertools",
  "proc-macro2",
  "quote",
- "syn 2.0.106",
+ "syn",
 ]
 
 [[package]]
 name = "soroban-env-common"
-version = "23.0.1"
+version = "27.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "00067f52e8bbf1abf0de03fe3e2fbb06910893cfbe9a7d9093d6425658833ff3"
+checksum = "5aa50d998c0baafcc6078cb94f5228040c7719b1608c15debc3fc78365dc22f5"
 dependencies = [
  "arbitrary",
- "crate-git-revision",
+ "crate-git-revision 0.0.6",
  "ethnum",
  "num-derive",
  "num-traits",
@@ -1286,9 +1348,9 @@ dependencies = [
 
 [[package]]
 name = "soroban-env-guest"
-version = "23.0.1"
+version = "27.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ccd1e40963517b10963a8e404348d3fe6caf9c278ac47a6effd48771297374d6"
+checksum = "fde1064f5e92dbcc8018ecc8e92728bf5bbff0236abaf792c6858367a6853415"
 dependencies = [
  "soroban-env-common",
  "static_assertions",
@@ -1296,11 +1358,12 @@ dependencies = [
 
 [[package]]
 name = "soroban-env-host"
-version = "23.0.1"
+version = "27.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b9766c5ad78e9d8ae10afbc076301f7d610c16407a1ebb230766dbe007a48725"
+checksum = "f47762a1b75b9ccd07558f28e1a0289ca6adec56810c581cde5cf16e329e00b9"
 dependencies = [
  "ark-bls12-381",
+ "ark-bn254",
  "ark-ec",
  "ark-ff",
  "ark-serialize",
@@ -1332,9 +1395,9 @@ dependencies = [
 
 [[package]]
 name = "soroban-env-macros"
-version = "23.0.1"
+version = "27.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b0e6a1c5844257ce96f5f54ef976035d5bd0ee6edefaf9f5e0bcb8ea4b34228c"
+checksum = "bc04b813a9e32456b37875fc41cdb05912a9e947000b9414b7985bffe07a889a"
 dependencies = [
  "itertools",
  "proc-macro2",
@@ -1342,14 +1405,14 @@ dependencies = [
  "serde",
  "serde_json",
  "stellar-xdr",
- "syn 2.0.106",
+ "syn",
 ]
 
 [[package]]
 name = "soroban-ledger-snapshot"
-version = "23.5.3"
+version = "27.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fea7299402f5f445089fde192cc68587baf0cc6432be300bce99d997fd85b4cb"
+checksum = "1e4bf41f85da648dca4153ca5ed41411658d2029e15d9ba693fdd2e3e5dbe05d"
 dependencies = [
  "serde",
  "serde_json",
@@ -1361,13 +1424,13 @@ dependencies = [
 
 [[package]]
 name = "soroban-sdk"
-version = "23.5.3"
+version = "27.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dd1e11f9fd537f9df29ec1a66c1b78d666094df56e196565d292ebf9a72732b4"
+checksum = "a5636f9d62dd0cc6d23f08f775aa60f712ec596e5761f6911aee154337d401bf"
 dependencies = [
  "arbitrary",
  "bytes-lit",
- "crate-git-revision",
+ "crate-git-revision 0.0.9",
  "ctor",
  "derive_arbitrary",
  "ed25519-dalek",
@@ -1385,9 +1448,9 @@ dependencies = [
 
 [[package]]
 name = "soroban-sdk-macros"
-version = "23.5.3"
+version = "27.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "caa7114e2f031b6fbd30376e844f3c55f6daf56f6f9d33ce309f846ffced316d"
+checksum = "f7c9f001d91196d9cd659634f9113f75609819204aef5fae27b4ab845cdfc741"
 dependencies = [
  "darling 0.20.11",
  "heck",
@@ -1400,16 +1463,17 @@ dependencies = [
  "soroban-spec",
  "soroban-spec-rust",
  "stellar-xdr",
- "syn 2.0.106",
+ "syn",
 ]
 
 [[package]]
 name = "soroban-spec"
-version = "23.5.3"
+version = "27.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1303589e67e7c76d0571b8d797b75f9fa33a1ceb1b4361a981570a3ebf00ac19"
+checksum = "ca1e22ce713871c6f9d21a321051b58e53080629b6a5be1132cf11f42cca4d10"
 dependencies = [
  "base64",
+ "sha2",
  "stellar-xdr",
  "thiserror",
  "wasmparser",
@@ -1417,9 +1481,9 @@ dependencies = [
 
 [[package]]
 name = "soroban-spec-rust"
-version = "23.5.3"
+version = "27.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "956188f28b750b80a2bb4cd5698038746edae1be51ec19a29c7efc6dcd922e5f"
+checksum = "89fb158f79ec527e46a5d5162f11c4269e17748e6b69391cdf648133d76cfead"
 dependencies = [
  "prettyplease",
  "proc-macro2",
@@ -1427,7 +1491,7 @@ dependencies = [
  "sha2",
  "soroban-spec",
  "stellar-xdr",
- "syn 2.0.106",
+ "syn",
  "thiserror",
 ]
 
@@ -1478,7 +1542,7 @@ version = "0.0.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ee1832fb50c651ad10f734aaf5d31ca5acdfb197a6ecda64d93fcdb8885af913"
 dependencies = [
- "crate-git-revision",
+ "crate-git-revision 0.0.6",
  "data-encoding",
 ]
 
@@ -1488,21 +1552,21 @@ version = "0.0.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "084afcb0d458c3d5d5baa2d294b18f881e62cc258ef539d8fdf68be7dbe45520"
 dependencies = [
- "crate-git-revision",
+ "crate-git-revision 0.0.6",
  "data-encoding",
  "heapless",
 ]
 
 [[package]]
 name = "stellar-xdr"
-version = "23.0.0"
+version = "27.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "89d2848e1694b0c8db81fd812bfab5ea71ee28073e09ccc45620ef3cf7a75a9b"
+checksum = "05ff843326969bdf1ef673dcdba94c08f4a3c8f1e58d6e6ef39b1bd4f749179a"
 dependencies = [
  "arbitrary",
  "base64",
  "cfg_eval",
- "crate-git-revision",
+ "crate-git-revision 0.0.6",
  "escape-bytes",
  "ethnum",
  "hex",
@@ -1524,17 +1588,6 @@ version = "2.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "13c2bddecc57b384dee18652358fb23172facb8a2c51ccc10d74c157bdea3292"
 
-[[package]]
-name = "syn"
-version = "1.0.109"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "72b64191b275b66ffe2469e8af2c1cfe3bafa67b529ead792a6d0160888b4237"
-dependencies = [
- "proc-macro2",
- "quote",
- "unicode-ident",
-]
-
 [[package]]
 name = "syn"
 version = "2.0.106"
@@ -1563,7 +1616,7 @@ checksum = "4fee6c4efc90059e10f81e6d42c60a18f76588c3d74cb83a0b242a2b6c7504c1"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.106",
+ "syn",
 ]
 
 [[package]]
@@ -1623,7 +1676,7 @@ checksum = "d674d135b4a8c1d7e813e2f8d1c9a58308aee4a680323066025e53132218bd91"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.106",
+ "syn",
 ]
 
 [[package]]
@@ -1655,7 +1708,7 @@ dependencies = [
  "log",
  "proc-macro2",
  "quote",
- "syn 2.0.106",
+ "syn",
  "wasm-bindgen-shared",
 ]
 
@@ -1677,7 +1730,7 @@ checksum = "9f07d2f20d4da7b26400c9f4a0511e6e0345b040694e8a75bd41d578fa4421d7"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.106",
+ "syn",
  "wasm-bindgen-backend",
  "wasm-bindgen-shared",
 ]
@@ -1749,7 +1802,7 @@ checksum = "edb307e42a74fb6de9bf3a02d9712678b22399c87e6fa869d6dfcd8c1b7754e0"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.106",
+ "syn",
 ]
 
 [[package]]
@@ -1760,7 +1813,7 @@ checksum = "c0abd1ddbc6964ac14db11c7213d6532ef34bd9aa042c2e5935f59d7908b46a5"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.106",
+ "syn",
 ]
 
 [[package]]
@@ -1804,7 +1857,7 @@ checksum = "88d2b8d9c68ad2b9e4340d7832716a4d21a22a1154777ad56ea55c51a9cf3831"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.106",
+ "syn",
 ]
 
 [[package]]
@@ -1824,5 +1877,5 @@ checksum = "ce36e65b0d2999d2aafac989fb249189a141aee1f53c612c1f37d72631959f69"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.106",
+ "syn",
 ]
diff --git a/Cargo.toml b/Cargo.toml
index 4e630a4..52f51f7 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -5,7 +5,7 @@ members = [
 ]
 
 [workspace.dependencies]
-soroban-sdk = "23.5.2"
+soroban-sdk = "27.0.0"
 
 [profile.release]
 opt-level = "z"
diff --git a/docs/scout-audit-report.md b/docs/scout-audit-report.md
index 08ce73a..5b2f330 100644
--- a/docs/scout-audit-report.md
+++ b/docs/scout-audit-report.md
@@ -179,8 +179,8 @@ The 1.2.0 fix maintains `NonOwnerContributionTotal` in `add_funds`, so `start_ca
 
 | Finding | Count | Assessment |
 |---|---|---|
-| Use latest Soroban version (23.5.2, latest 26.1.0) | 2 | Upgrade planned with next contract deployment. SDK 23.5.x is stable on testnet. |
-| Emit events when storage is modified (profile + events contracts) | ~50 | Scout flags the lib.rs dispatcher functions, which are thin wrappers. The actual event emissions live in the implementation modules (credits.rs, reputation.rs, admin.rs) and emit for every state-changing operation. All 50 ENHANCEMENT warnings are false positives caused by Scout not tracing through function calls. Verified by code inspection. |
+| Use latest Soroban version (was 23.5.2, latest 27.0.0) | 2 | **Resolved.** Bumped `soroban-sdk` to `27.0.0` (workspace `Cargo.toml`), Rust toolchain to `1.91.0` (`rust-toolchain.toml`), and build target to `wasm32v1-none`. All 197 events + 66 profile tests pass. |
+| Emit events when storage is modified (profile + events contracts) | ~44 | **No action.** Scout flags `lib.rs` dispatcher functions, which are thin wrappers. The underlying implementation modules (`event_ops.rs`, `grant.rs`, `crowdfunding.rs`, `admin.rs`, `reputation.rs`, etc.) emit a typed Soroban event for every state-changing operation. Scout cannot trace through function calls. All flags verified by code inspection. The one genuinely missing event (`ManagerChanged`) is tracked in issue #3 and is not part of this scanner batch. |
 
 ---
 
@@ -254,7 +254,8 @@ For audit panel reference -- these Scout warnings require no code change:
 | M-7 | `storage.rs` | 343 | Called only from auth-gated `apply()` |
 | M-8 | `event_ops.rs` | — | Vec validated in function body |
 | M-9 | `storage.rs` | 343,418,498 | In-memory Vec accumulation in read-only helpers; not a storage write |
-| ENHANCEMENT | all | — | All ~50 ENHANCEMENT warnings flag dispatcher wrappers in lib.rs; underlying implementations emit events. Scout cannot trace through function calls. |
+| ENHANCEMENT (soroban_version) | `Cargo.toml` | — | Resolved: bumped to soroban-sdk 27.0.0 / Rust 1.91.0 / wasm32v1-none target. |
+| ENHANCEMENT (storage_change_events, ~44 flags) | `lib.rs` dispatcher functions | — | No action: dispatcher wrappers delegate to impl modules that already emit events. Scout cannot trace through function calls. `ManagerChanged` is the only genuine gap; tracked in issue #3. |
 
 **Fixed findings (no longer in scan output):**
 
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
index 43e5784..0e152a8 100644
--- a/rust-toolchain.toml
+++ b/rust-toolchain.toml
@@ -1,3 +1,3 @@
 [toolchain]
-channel = "1.90.0"
+channel = "1.93.0"
 components = ["rustfmt", "clippy"]