diff --git a/Cargo.toml b/Cargo.toml
index a055c80..9aa00fd 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -14,10 +14,10 @@ doctest = false
 # CryptoRng trait; combined with the recent ed25519-dalek 3.0.0 + a
 # gitignored Cargo.lock, this breaks `cargo test` on CI. 21.7.7 pairs
 # with `soroban-env-host 21.2.1` which compiles cleanly.
-soroban-sdk = "=21.7.7"
+soroban-sdk = "=27.0.3"
 
 [dev-dependencies]
-soroban-sdk = { version = "=21.7.7", features = ["testutils"] }
+soroban-sdk = { version = "=27.0.3", features = ["testutils"] }
 proptest = "1.4.0"
 
 [features]