diff --git a/contracts/Cargo.toml b/contracts/Cargo.toml
index fa1fad45..9a4ec8ee 100644
--- a/contracts/Cargo.toml
+++ b/contracts/Cargo.toml
@@ -28,5 +28,5 @@ codegen-units = 1
 lto = true
 
 [workspace.dependencies]
-soroban-sdk = "27.0.6"
+soroban-sdk = "28.0.0"
 arbitrary = { version = "1.3", features = ["derive"] }
diff --git a/contracts/invoice/Cargo.toml b/contracts/invoice/Cargo.toml
index 205ab28c..bba926fd 100644
--- a/contracts/invoice/Cargo.toml
+++ b/contracts/invoice/Cargo.toml
@@ -11,9 +11,9 @@ path = "src/lib.rs"
 crate-type = ["cdylib", "rlib"]
 
 [dependencies]
-soroban-sdk = "21.0.0"
+soroban-sdk = "28.0.0"
 subtrackr-types = { path = "../types" }
 
 [dev-dependencies]
-soroban-sdk = { version = "21.0.0", features = ["testutils"] }
+soroban-sdk = { version = "28.0.0", features = ["testutils"] }
 subtrackr-storage = { path = "../storage" }
diff --git a/contracts/types/Cargo.toml b/contracts/types/Cargo.toml
index 5e4b514b..39fbc870 100644
--- a/contracts/types/Cargo.toml
+++ b/contracts/types/Cargo.toml
@@ -11,4 +11,4 @@ path = "src/lib.rs"
 crate-type = ["rlib"]
 
 [dependencies]
-soroban-sdk = "27.0.6"
+soroban-sdk = "28.0.0"