From f82524be82b6abceb2264f448956ddd3fc3603df Mon Sep 17 00:00:00 2001
From: Sakariyah Abdulhazeem <sakariyahabdulhazeem@gmail.com>
Date: Sun, 27 Sep 2026 02:05:41 +0100
Subject: [PATCH] chore(contracts): upgrade soroban-sdk to 26

---
 Cargo.lock                          | 255 +++++++++++++++++++---------
 Cargo.toml                          |  22 ++-
 contracts/locked_in/Cargo.toml      |   6 +-
 contracts/mock_pool/Cargo.toml      |   6 +-
 contracts/plans/Cargo.toml          |   6 +-
 contracts/plans/src/test.rs         |   5 +-
 contracts/spend_save/Cargo.toml     |   6 +-
 contracts/target_savings/Cargo.toml |   6 +-
 rust-toolchain.toml                 |   2 +-
 9 files changed, 210 insertions(+), 104 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index 8035d1d..4f0335b 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-tzdata"
 version = "0.1.1"
@@ -40,9 +46,9 @@ 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",
@@ -50,112 +56,136 @@ 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 0.15.3",
  "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 2.0.101",
 ]
 
 [[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 2.0.101",
 ]
 
 [[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 0.15.3",
 ]
 
 [[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 2.0.101",
 ]
 
 [[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 = "1.4.0"
@@ -195,6 +225,12 @@ version = "3.17.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1628fb46dfa0b37568d12e5edd512553eccf6a22a78e8bde00bb4aed84d5bdbf"
 
+[[package]]
+name = "byteorder"
+version = "1.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1fd0f2584146f6f2ef48085050886acf353beff7305ebd1ae69500e27c67f64b"
+
 [[package]]
 name = "bytes-lit"
 version = "0.0.5"
@@ -404,17 +440,6 @@ dependencies = [
  "serde",
 ]
 
-[[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"
@@ -503,6 +528,18 @@ 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 2.0.101",
+]
+
 [[package]]
 name = "either"
 version = "1.15.0"
@@ -527,6 +564,26 @@ dependencies = [
  "zeroize",
 ]
 
+[[package]]
+name = "enum-ordinalize"
+version = "4.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "89dd01549b09589510cf0647475075d12071456586d70f5c75c98ae2a5537677"
+dependencies = [
+ "enum-ordinalize-derive",
+]
+
+[[package]]
+name = "enum-ordinalize-derive"
+version = "4.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a65863d15a4ce2888bd2f0f543cc963d3879c3a022c8ee43f6141d479a3ac815"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 3.0.6",
+]
+
 [[package]]
 name = "equivalent"
 version = "1.0.2"
@@ -541,9 +598,9 @@ checksum = "2bfcf67fea2815c2fc3b90873fae90957be12ff417335dfadc7f52927feb03b2"
 
 [[package]]
 name = "ethnum"
-version = "1.5.1"
+version = "1.5.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0939f82868b77ef93ce3c3c3daf2b3c526b456741da5a1a4559e590965b6026b"
+checksum = "40404c3f5f511ec4da6fe866ddf6a717c309fdbb69fbbad7b0f3edab8f2e835f"
 
 [[package]]
 name = "ff"
@@ -602,6 +659,15 @@ dependencies = [
  "subtle",
 ]
 
+[[package]]
+name = "hash32"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "47d60b12902ba28e2730cd37e95b8c9223af2808df9e902d4df49588d1470606"
+dependencies = [
+ "byteorder",
+]
+
 [[package]]
 name = "hashbrown"
 version = "0.12.3"
@@ -610,18 +676,22 @@ checksum = "8a9ee70c43aaf417c914396645a0fa852624801b24ebb7ae78fe8272889ac888"
 
 [[package]]
 name = "hashbrown"
-version = "0.13.2"
+version = "0.15.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "43a3c133739dddd0d2990f9a4bdf8eb4b21ef50e4851ca85ab661199821d510e"
+checksum = "84b26c544d002229e640969970a2e74021aadf6e2f96372b9c58eff97de08eb3"
 dependencies = [
- "ahash",
+ "allocator-api2",
 ]
 
 [[package]]
-name = "hashbrown"
-version = "0.15.3"
+name = "heapless"
+version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "84b26c544d002229e640969970a2e74021aadf6e2f96372b9c58eff97de08eb3"
+checksum = "0bfb9eb618601c89945a70e254898da93b13be0388091d42117462b265bb3fad"
+dependencies = [
+ "hash32",
+ "stable_deref_trait",
+]
 
 [[package]]
 name = "heck"
@@ -713,9 +783,9 @@ 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",
 ]
@@ -1157,9 +1227,9 @@ checksum = "8917285742e9f3e1683f0a9c4e6b57960b7314d0b08d30d1ecd426713ee2eee9"
 
 [[package]]
 name = "soroban-builtin-sdk-macros"
-version = "23.0.1"
+version = "26.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d9336adeabcd6f636a4e0889c8baf494658ef5a3c4e7e227569acd2ce9091e85"
+checksum = "cc4a09f48a67357fdad682b601f4a2f3fdd8d897f3a97c2e1704fa22b0a474e0"
 dependencies = [
  "itertools",
  "proc-macro2",
@@ -1169,9 +1239,9 @@ dependencies = [
 
 [[package]]
 name = "soroban-env-common"
-version = "23.0.1"
+version = "26.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "00067f52e8bbf1abf0de03fe3e2fbb06910893cfbe9a7d9093d6425658833ff3"
+checksum = "ededa4063061c00886490bb3290e416ee0b03d7732a7378ccba7bb19211fb00c"
 dependencies = [
  "arbitrary",
  "crate-git-revision",
@@ -1188,9 +1258,9 @@ dependencies = [
 
 [[package]]
 name = "soroban-env-guest"
-version = "23.0.1"
+version = "26.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ccd1e40963517b10963a8e404348d3fe6caf9c278ac47a6effd48771297374d6"
+checksum = "1ff2525f31e2453b52e90400a2952ce4618f8925bd03167938573e83c320c33f"
 dependencies = [
  "soroban-env-common",
  "static_assertions",
@@ -1198,11 +1268,12 @@ dependencies = [
 
 [[package]]
 name = "soroban-env-host"
-version = "23.0.1"
+version = "26.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b9766c5ad78e9d8ae10afbc076301f7d610c16407a1ebb230766dbe007a48725"
+checksum = "755806fedf2c948e882dff4bf69a8e844c9950b1d534abcadba4026150180274"
 dependencies = [
  "ark-bls12-381",
+ "ark-bn254",
  "ark-ec",
  "ark-ff",
  "ark-serialize",
@@ -1228,15 +1299,15 @@ dependencies = [
  "soroban-env-common",
  "soroban-wasmi",
  "static_assertions",
- "stellar-strkey",
+ "stellar-strkey 0.0.13",
  "wasmparser",
 ]
 
 [[package]]
 name = "soroban-env-macros"
-version = "23.0.1"
+version = "26.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b0e6a1c5844257ce96f5f54ef976035d5bd0ee6edefaf9f5e0bcb8ea4b34228c"
+checksum = "e446ac7f005d89cb77cc4e2cc006377e1a8c970c9b05d11968a32f78e10e4ef4"
 dependencies = [
  "itertools",
  "proc-macro2",
@@ -1249,9 +1320,9 @@ dependencies = [
 
 [[package]]
 name = "soroban-ledger-snapshot"
-version = "23.0.3"
+version = "26.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cdefc9240bddd3ff4d47fd4d8f8dd44784840e25a18e426c6c987db8572d6df9"
+checksum = "bf43abc1e6219c45dd14e75e8abb848a6cf9830372febbe005fda1cbfb8c940f"
 dependencies = [
  "serde",
  "serde_json",
@@ -1263,9 +1334,9 @@ dependencies = [
 
 [[package]]
 name = "soroban-sdk"
-version = "23.0.3"
+version = "26.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7cb0dc3eb3661962cb8833513953b5839df14d589d96f8370b5b0c3870a8b3b5"
+checksum = "b4ce2a22afcbfc9407fe32ce789f441636d62cd078a4cc126191932b74b1e6c4"
 dependencies = [
  "arbitrary",
  "bytes-lit",
@@ -1281,14 +1352,15 @@ dependencies = [
  "soroban-env-host",
  "soroban-ledger-snapshot",
  "soroban-sdk-macros",
- "stellar-strkey",
+ "stellar-strkey 0.0.16",
+ "visibility",
 ]
 
 [[package]]
 name = "soroban-sdk-macros"
-version = "23.0.3"
+version = "26.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7eab5f4e5f3836a4b4aeecb2837160e944621b2f8dbad775638a2ab8e10fd5bb"
+checksum = "6538ceb7d40c01499c2779b449a697c56c62a60bae6e5c5705d3a782075b5028"
 dependencies = [
  "darling",
  "heck",
@@ -1306,11 +1378,12 @@ dependencies = [
 
 [[package]]
 name = "soroban-spec"
-version = "23.0.3"
+version = "26.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fd257b0365307e0b8d38040ee0364abcc610fc6e61960ff5e26803922d098921"
+checksum = "ca18ced644f86e1e36a0fddb856d45a6a8478296e6b54941fb5e2daa96076bf7"
 dependencies = [
  "base64",
+ "sha2",
  "stellar-xdr",
  "thiserror",
  "wasmparser",
@@ -1318,9 +1391,9 @@ dependencies = [
 
 [[package]]
 name = "soroban-spec-rust"
-version = "23.0.3"
+version = "26.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1ec3c72de91fdcf637045f3351df029a98b9de9ad22ced4063f74d0b5873f526"
+checksum = "6f3e3933a8ca588de7fb70460a48a5e0b043f43836aeb11b6aa0128143d95814"
 dependencies = [
  "prettyplease",
  "proc-macro2",
@@ -1369,6 +1442,12 @@ dependencies = [
  "der",
 ]
 
+[[package]]
+name = "stable_deref_trait"
+version = "1.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6ce2be8dc25455e1f91df71bfa12ad37d7af1092ae736f3a6cd0e37bc7810596"
+
 [[package]]
 name = "static_assertions"
 version = "1.1.0"
@@ -1385,11 +1464,22 @@ dependencies = [
  "data-encoding",
 ]
 
+[[package]]
+name = "stellar-strkey"
+version = "0.0.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "084afcb0d458c3d5d5baa2d294b18f881e62cc258ef539d8fdf68be7dbe45520"
+dependencies = [
+ "crate-git-revision",
+ "data-encoding",
+ "heapless",
+]
+
 [[package]]
 name = "stellar-xdr"
-version = "23.0.0"
+version = "26.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "89d2848e1694b0c8db81fd812bfab5ea71ee28073e09ccc45620ef3cf7a75a9b"
+checksum = "ea6e29c7e1f071c2767916460d006668197843d5d93f0ec8893a26f72a14f595"
 dependencies = [
  "arbitrary",
  "base64",
@@ -1401,7 +1491,7 @@ dependencies = [
  "serde",
  "serde_with",
  "sha2",
- "stellar-strkey",
+ "stellar-strkey 0.0.13",
 ]
 
 [[package]]
@@ -1418,9 +1508,9 @@ checksum = "13c2bddecc57b384dee18652358fb23172facb8a2c51ccc10d74c157bdea3292"
 
 [[package]]
 name = "syn"
-version = "1.0.109"
+version = "2.0.101"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "72b64191b275b66ffe2469e8af2c1cfe3bafa67b529ead792a6d0160888b4237"
+checksum = "8ce2b7fc941b3a24138a0a7cf8e858bfc6a992e7978a068a5c760deb0ed43caf"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -1429,9 +1519,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.101"
+version = "3.0.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8ce2b7fc941b3a24138a0a7cf8e858bfc6a992e7978a068a5c760deb0ed43caf"
+checksum = "8593e8e72159ed2257d083c7a454a85cbf854f37a0966d8d483aff8c8a3ebcee"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -1516,6 +1606,17 @@ version = "0.9.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0b928f33d975fc6ad9f86c8f283853ad26bdd5b10b7f1542aa2fa15e2289105a"
 
+[[package]]
+name = "visibility"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d674d135b4a8c1d7e813e2f8d1c9a58308aee4a680323066025e53132218bd91"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.101",
+]
+
 [[package]]
 name = "wasi"
 version = "0.11.0+wasi-snapshot-preview1"
diff --git a/Cargo.toml b/Cargo.toml
index ad48642..a9dbefa 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -10,39 +10,43 @@ repository = "https://github.com/Lokt-In/loktin"
 version = "0.0.1"
 
 [workspace.dependencies.soroban-sdk]
-version = "23.0.2"
+version = "26.1.0"
+
+[workspace.dependencies.stellar-xdr]
+version = "26.0.1"
+features = ["curr", "serde"]
 
 [workspace.dependencies.stellar-access]
 git = "https://github.com/OpenZeppelin/stellar-contracts"
-tag = "v0.5.1"
+tag = "v0.7.2"
 
 [workspace.dependencies.stellar-default-impl-macro]
 git = "https://github.com/OpenZeppelin/stellar-contracts"
-tag = "v0.3.0"
+tag = "v0.7.2"
 
 [workspace.dependencies.stellar-fungible]
 git = "https://github.com/OpenZeppelin/stellar-contracts"
-tag = "v0.3.0"
+tag = "v0.7.2"
 
 [workspace.dependencies.stellar-macros]
 git = "https://github.com/OpenZeppelin/stellar-contracts"
-tag = "v0.5.1"
+tag = "v0.7.2"
 
 [workspace.dependencies.stellar-non-fungible]
 git = "https://github.com/OpenZeppelin/stellar-contracts"
-tag = "v0.3.0"
+tag = "v0.7.2"
 
 [workspace.dependencies.stellar-pausable]
 git = "https://github.com/OpenZeppelin/stellar-contracts"
-tag = "v0.3.0"
+tag = "v0.7.2"
 
 [workspace.dependencies.stellar-pausable-macros]
 git = "https://github.com/OpenZeppelin/stellar-contracts"
-tag = "v0.3.0"
+tag = "v0.7.2"
 
 [workspace.dependencies.stellar-tokens]
 git = "https://github.com/OpenZeppelin/stellar-contracts"
-tag = "v0.5.1"
+tag = "v0.7.2"
 
 [profile.release]
 opt-level = "z"
diff --git a/contracts/locked_in/Cargo.toml b/contracts/locked_in/Cargo.toml
index d17e015..3d23a13 100644
--- a/contracts/locked_in/Cargo.toml
+++ b/contracts/locked_in/Cargo.toml
@@ -15,9 +15,9 @@ crate-type = ["cdylib"]
 doctest = false
 
 [dependencies]
-soroban-sdk = "23.0.3"
+soroban-sdk = { workspace = true }
 
 [dev-dependencies]
-stellar-xdr = { version = "23.0.0", features = ["curr", "serde"] }
-soroban-sdk = { version = "23.0.3", features = ["testutils"] }
+stellar-xdr = { workspace = true }
+soroban-sdk = { workspace = true, features = ["testutils"] }
 mock_pool = { path = "../mock_pool" }
diff --git a/contracts/mock_pool/Cargo.toml b/contracts/mock_pool/Cargo.toml
index 5038a5c..7d091f0 100644
--- a/contracts/mock_pool/Cargo.toml
+++ b/contracts/mock_pool/Cargo.toml
@@ -15,8 +15,8 @@ crate-type = ["lib", "cdylib"]
 doctest = false
 
 [dependencies]
-soroban-sdk = "23.0.3"
+soroban-sdk = { workspace = true }
 
 [dev-dependencies]
-stellar-xdr = { version = "23.0.0", features = ["curr", "serde"] }
-soroban-sdk = { version = "23.0.3", features = ["testutils"] }
+stellar-xdr = { workspace = true }
+soroban-sdk = { workspace = true, features = ["testutils"] }
diff --git a/contracts/plans/Cargo.toml b/contracts/plans/Cargo.toml
index 2c340a3..57ce46b 100644
--- a/contracts/plans/Cargo.toml
+++ b/contracts/plans/Cargo.toml
@@ -15,8 +15,8 @@ crate-type = ["cdylib"]
 doctest = false
 
 [dependencies]
-soroban-sdk = "23.0.3"
+soroban-sdk = { workspace = true }
 
 [dev-dependencies]
-stellar-xdr = { version = "23.0.0", features = ["curr", "serde"] }
-soroban-sdk = { version = "23.0.3", features = ["testutils"] }
+stellar-xdr = { workspace = true }
+soroban-sdk = { workspace = true, features = ["testutils"] }
diff --git a/contracts/plans/src/test.rs b/contracts/plans/src/test.rs
index d75049e..5545a3b 100644
--- a/contracts/plans/src/test.rs
+++ b/contracts/plans/src/test.rs
@@ -1,4 +1,5 @@
 #![cfg(test)]
+extern crate std;
 
 use super::*;
 use soroban_sdk::{
@@ -36,7 +37,7 @@ fn mint_tokens(env: &Env, token: &TokenClient, to: &Address, amount: i128) {
 fn set_ledger_time(env: &Env, timestamp: u64, sequence: u32) {
     env.ledger().set(LedgerInfo {
         timestamp,
-        protocol_version: 23,
+        protocol_version: 26,
         sequence_number: sequence,
         network_id: Default::default(),
         base_reserve: 10,
@@ -782,4 +783,4 @@ fn test_recurring_bill_with_recurrence_calendar() {
     let bill = client.get_bill(&bill_id);
     assert_eq!(bill.is_recurring, true);
     assert_eq!(bill.recurrence_calendar.len(), 3);
-}
\ No newline at end of file
+}
diff --git a/contracts/spend_save/Cargo.toml b/contracts/spend_save/Cargo.toml
index 845b016..684a9b1 100644
--- a/contracts/spend_save/Cargo.toml
+++ b/contracts/spend_save/Cargo.toml
@@ -15,8 +15,8 @@ crate-type = ["cdylib"]
 doctest = false
 
 [dependencies]
-soroban-sdk = "23.0.3"
+soroban-sdk = { workspace = true }
 
 [dev-dependencies]
-stellar-xdr = { version = "23.0.0", features = ["curr", "serde"] }
-soroban-sdk = { version = "23.0.3", features = ["testutils"] }
+stellar-xdr = { workspace = true }
+soroban-sdk = { workspace = true, features = ["testutils"] }
diff --git a/contracts/target_savings/Cargo.toml b/contracts/target_savings/Cargo.toml
index f007feb..f302798 100644
--- a/contracts/target_savings/Cargo.toml
+++ b/contracts/target_savings/Cargo.toml
@@ -15,9 +15,9 @@ crate-type = ["cdylib"]
 doctest = false
 
 [dependencies]
-soroban-sdk = "23.0.3"
+soroban-sdk = { workspace = true }
 
 [dev-dependencies]
-stellar-xdr = { version = "23.0.0", features = ["curr", "serde"] }
-soroban-sdk = { version = "23.0.3", features = ["testutils"] }
+stellar-xdr = { workspace = true }
+soroban-sdk = { workspace = true, features = ["testutils"] }
 mock_pool = { path = "../mock_pool" }
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
index aca06de..57e48ab 100644
--- a/rust-toolchain.toml
+++ b/rust-toolchain.toml
@@ -1,3 +1,3 @@
 [toolchain]
-channel = "1.89.0"
+channel = "1.91.0"
 targets = ["wasm32v1-none"]