diff --git a/examples/checkers/Cargo.toml b/examples/checkers/Cargo.toml
index 1f87cdc..0789d81 100644
--- a/examples/checkers/Cargo.toml
+++ b/examples/checkers/Cargo.toml
@@ -10,6 +10,7 @@ crate-type = ["cdylib"]
 
 [dependencies]
 soroban-sdk = "25.1.0"
+cougr-core = "1.0.0"
 
 [dev-dependencies]
 soroban-sdk = { version = "25.1.0", features = ["testutils"] }