diff --git a/contracts/Cargo.lock b/contracts/Cargo.lock
index a8b68bb..928d881 100644
--- a/contracts/Cargo.lock
+++ b/contracts/Cargo.lock
@@ -322,16 +322,15 @@ checksum = "75b325c5dbd37f80359721ad39aca5a29fb04c89279657cffdda8736d0c0b9d2"
 
 [[package]]
 name = "ecdsa"
-version = "0.16.9"
+version = "0.16.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ee27f32b5c5292967d2d4a9d7f1e0b0aed2c15daded5a60300e4abb9d8020bca"
+checksum = "0997c976637b606099b9985693efa3581e84e41f5c11ba5255f88711058ad428"
 dependencies = [
  "der",
  "digest",
  "elliptic-curve",
  "rfc6979",
  "signature",
- "spki",
 ]
 
 [[package]]
@@ -346,15 +345,16 @@ dependencies = [
 
 [[package]]
 name = "ed25519-dalek"
-version = "2.0.0"
+version = "2.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7277392b266383ef8396db7fdeb1e77b6c52fed775f5df15bb24f35b72156980"
+checksum = "4a3daa8e81a3963a60642bcc1f90a670680bd4a77535faa384e9d1c79d620871"
 dependencies = [
  "curve25519-dalek",
  "ed25519",
  "rand_core",
  "serde",
  "sha2",
+ "subtle",
  "zeroize",
 ]
 
@@ -376,7 +376,6 @@ dependencies = [
  "ff",
  "generic-array",
  "group",
- "pkcs8",
  "rand_core",
  "sec1",
  "subtle",
@@ -599,9 +598,7 @@ dependencies = [
  "cfg-if",
  "ecdsa",
  "elliptic-curve",
- "once_cell",
  "sha2",
- "signature",
 ]
 
 [[package]]
@@ -715,6 +712,18 @@ version = "1.19.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3fdb12b2476b595f9358c5161aa467c2438859caa136dec86c26fdd2efe17b92"
 
+[[package]]
+name = "p256"
+version = "0.13.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c9863ad85fa8f4460f9c48cb909d38a0d689dba1f6f6988a5e3e0d31071bcd4b"
+dependencies = [
+ "ecdsa",
+ "elliptic-curve",
+ "primeorder",
+ "sha2",
+]
+
 [[package]]
 name = "paste"
 version = "1.0.15"
@@ -759,6 +768,15 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "primeorder"
+version = "0.13.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "353e1ca18966c16d9deb1c69278edbc5f194139612772bd9537af60ac231e1e6"
+dependencies = [
+ "elliptic-curve",
+]
+
 [[package]]
 name = "proc-macro2"
 version = "1.0.69"
@@ -840,14 +858,13 @@ checksum = "f3cb5ba0dc43242ce17de99c180e96db90b235b8a9fdc9543c96d2209116bd9f"
 
 [[package]]
 name = "sec1"
-version = "0.7.3"
+version = "0.7.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d3e97a565f76233a6003f9f5c54be1d9c5bdfa3eccfb189469f11ec4901c47dc"
+checksum = "f0aec48e813d6b90b15f0b8948af3c63483992dee44c03e9930b3eebdabe046e"
 dependencies = [
  "base16ct",
  "der",
  "generic-array",
- "pkcs8",
  "subtle",
  "zeroize",
 ]
@@ -942,9 +959,9 @@ dependencies = [
 
 [[package]]
 name = "signature"
-version = "2.2.0"
+version = "2.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "77549399552de45a898a580c1b41d445bf730df867cc44e6c0233bbc4b8329de"
+checksum = "5e1788eed21689f9cf370582dfc467ef36ed9c707f073528ddafa8d83e3b8500"
 dependencies = [
  "digest",
  "rand_core",
@@ -958,9 +975,9 @@ checksum = "3c5e1a9a646d36c3599cd173a41282daf47c44583ad367b8e6837255952e5c67"
 
 [[package]]
 name = "soroban-builtin-sdk-macros"
-version = "20.3.0"
+version = "21.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7cc32c6e817f3ca269764ec0d7d14da6210b74a5bf14d4e745aa3ee860558900"
+checksum = "44877373b3dc6c662377cb1600e3a62706d75e484b6064f9cd22e467c676b159"
 dependencies = [
  "itertools",
  "proc-macro2",
@@ -970,9 +987,9 @@ dependencies = [
 
 [[package]]
 name = "soroban-env-common"
-version = "20.3.0"
+version = "21.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c14e18d879c520ff82612eaae0590acaf6a7f3b977407e1abb1c9e31f94c7814"
+checksum = "590add16843a61b01844e19e89bccaaee6aa21dc76809017b0662c17dc139ee9"
 dependencies = [
  "arbitrary",
  "crate-git-revision",
@@ -984,13 +1001,14 @@ dependencies = [
  "soroban-wasmi",
  "static_assertions",
  "stellar-xdr",
+ "wasmparser",
 ]
 
 [[package]]
 name = "soroban-env-guest"
-version = "20.3.0"
+version = "21.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5122ca2abd5ebcc1e876a96b9b44f87ce0a0e06df8f7c09772ddb58b159b7454"
+checksum = "05ec8dc43acdd6c7e7b371acf44fc1a7dac24934ae3b2f05fafd618818548176"
 dependencies = [
  "soroban-env-common",
  "static_assertions",
@@ -998,13 +1016,16 @@ dependencies = [
 
 [[package]]
 name = "soroban-env-host"
-version = "20.3.0"
+version = "21.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "114a0fa0d0cc39d0be16b1ee35b6e5f4ee0592ddcf459bde69391c02b03cf520"
+checksum = "4e25aaffe0c62eb65e0e349f725b4b8b13ad0764d78a15aab5bbccb5c4797726"
 dependencies = [
  "backtrace",
  "curve25519-dalek",
+ "ecdsa",
  "ed25519-dalek",
+ "elliptic-curve",
+ "generic-array",
  "getrandom",
  "hex-literal",
  "hmac",
@@ -1012,8 +1033,10 @@ dependencies = [
  "num-derive",
  "num-integer",
  "num-traits",
+ "p256",
  "rand",
  "rand_chacha",
+ "sec1",
  "sha2",
  "sha3",
  "soroban-builtin-sdk-macros",
@@ -1021,13 +1044,14 @@ dependencies = [
  "soroban-wasmi",
  "static_assertions",
  "stellar-strkey",
+ "wasmparser",
 ]
 
 [[package]]
 name = "soroban-env-macros"
-version = "20.3.0"
+version = "21.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b13e3f8c86f812e0669e78fcb3eae40c385c6a9dd1a4886a1de733230b4fcf27"
+checksum = "3e16b761459fdf3c4b62b24df3941498d14e5246e6fadfb4774ed8114d243aa4"
 dependencies = [
  "itertools",
  "proc-macro2",
@@ -1040,18 +1064,18 @@ dependencies = [
 
 [[package]]
 name = "soroban-fixed-point-math"
-version = "1.0.0"
+version = "1.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "230e5902daf9de6e7591aa7864dcf763ff96914a4460a0294a5dfd62b3181e0f"
+checksum = "cb7ee8173a887e7c3a2e9c1f95e3944cdb2fad4009682efc4ad79e439c0e61bd"
 dependencies = [
  "soroban-sdk",
 ]
 
 [[package]]
 name = "soroban-ledger-snapshot"
-version = "20.5.0"
+version = "21.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "61a54708f44890e0546180db6b4f530e2a88d83b05a9b38a131caa21d005e25a"
+checksum = "eaebb7961fc6d8f47e00d404d9240f51aba85df9d67a4f556ef1c6057b5327a8"
 dependencies = [
  "serde",
  "serde_json",
@@ -1063,9 +1087,9 @@ dependencies = [
 
 [[package]]
 name = "soroban-sdk"
-version = "20.5.0"
+version = "21.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "84fc8be9068dd4e0212d8b13ad61089ea87e69ac212c262914503a961c8dc3a3"
+checksum = "60cd55eb88cbe1d9e7fe3ab1845c7c10c26b27e2d226e973150e5b55580aa359"
 dependencies = [
  "arbitrary",
  "bytes-lit",
@@ -1083,9 +1107,9 @@ dependencies = [
 
 [[package]]
 name = "soroban-sdk-macros"
-version = "20.5.0"
+version = "21.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "db20def4ead836663633f58d817d0ed8e1af052c9650a04adf730525af85b964"
+checksum = "b1916985d1871aa340d7eec834c387f74f80231c846801193c3252266a60a41e"
 dependencies = [
  "crate-git-revision",
  "darling",
@@ -1103,9 +1127,9 @@ dependencies = [
 
 [[package]]
 name = "soroban-spec"
-version = "20.5.0"
+version = "21.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3eefeb5d373b43f6828145d00f0c5cc35e96db56a6671ae9614f84beb2711cab"
+checksum = "439faff6a155975a9951f27aaa04ae8ef3fd8fe9413d202e2ea2ff094a593449"
 dependencies = [
  "base64 0.13.1",
  "stellar-xdr",
@@ -1115,9 +1139,9 @@ dependencies = [
 
 [[package]]
 name = "soroban-spec-rust"
-version = "20.5.0"
+version = "21.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3152bca4737ef734ac37fe47b225ee58765c9095970c481a18516a2b287c7a33"
+checksum = "20b2a571055f1ed15427ccb8d34ce4208b4135666eade124cfbecfc010fa2ea3"
 dependencies = [
  "prettyplease",
  "proc-macro2",
@@ -1177,9 +1201,9 @@ dependencies = [
 
 [[package]]
 name = "stellar-xdr"
-version = "20.1.0"
+version = "21.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e59cdf3eb4467fb5a4b00b52e7de6dca72f67fac6f9b700f55c95a5d86f09c9d"
+checksum = "2675a71212ed39a806e415b0dbf4702879ff288ec7f5ee996dda42a135512b50"
 dependencies = [
  "arbitrary",
  "base64 0.13.1",
@@ -1363,11 +1387,12 @@ dependencies = [
 
 [[package]]
 name = "wasmparser"
-version = "0.88.0"
+version = "0.116.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fb8cf7dd82407fe68161bedcd57fde15596f32ebf6e9b3bdbf3ae1da20e38e5e"
+checksum = "a58e28b80dd8340cb07b8242ae654756161f6fc8d0038123d679b7b99964fa50"
 dependencies = [
- "indexmap 1.9.3",
+ "indexmap 2.2.6",
+ "semver",
 ]
 
 [[package]]
diff --git a/contracts/Cargo.toml b/contracts/Cargo.toml
index b245c6b..9f96f73 100644
--- a/contracts/Cargo.toml
+++ b/contracts/Cargo.toml
@@ -3,8 +3,8 @@ resolver = "2"
 members = ["governance"]
 
 [workspace.dependencies]
-soroban-sdk = "20.4.0"
-soroban-fixed-point-math = "~1.0.0"
+soroban-sdk = "21.4.0"
+soroban-fixed-point-math = "1.1.1"
 
 [profile.release]
 opt-level = "z"