diff --git a/Cargo.lock b/Cargo.lock
index 36737b01028dd2261f6bfb0b0876ffd0f92f04b2..f75c0e3532acf615b0136735ef13f8f375aa5d33 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -479,14 +479,12 @@ dependencies = [
  "current_platform",
  "env_logger",
  "escape8259",
- "futures",
  "heck",
  "hex",
  "impl-serde",
  "indexmap",
  "ink_env",
  "ink_lang",
- "ink_lang_codegen",
  "ink_metadata",
  "ink_primitives",
  "ink_storage",
@@ -511,7 +509,6 @@ dependencies = [
  "substrate-build-script-utils",
  "subxt",
  "tempfile",
- "thiserror",
  "toml",
  "url",
  "wabt",
diff --git a/Cargo.toml b/Cargo.toml
index 2d68f15f70720097037172b42ed2c3c4c3c12d5d..69f8a4085e28bc6cd60ae081c0322c009dab1f49 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -56,13 +56,11 @@ sp-core = "6.0.0"
 sp-runtime = "6.0.0"
 pallet-contracts-primitives = "6.0.0"
 subxt = "0.21.0"
-futures = "0.3.19"
 hex = "0.4.3"
 jsonrpsee = { version = "0.13.1", features = ["ws-client"] }
 nom = "7.1.1"
 nom-supreme = { version = "0.7.0", features = ["error"] }
 indexmap = "1.8.1"
-thiserror = "1.0.31"
 escape8259 = "0.5.1"
 itertools = "0.10.3"
 
@@ -86,7 +84,6 @@ predicates = "2.1.1"
 ink_primitives = "3"
 ink_storage = "3"
 ink_lang = "3"
-ink_lang_codegen = "3"
 
 [features]
 # This `std` feature is required for testing using an inline contract's metadata, because `ink!` annotates the metadata
diff --git a/metadata/lib.rs b/metadata/lib.rs
index 6a71554c8067022db7dc9fdc68740ae26e6a5e43..76aa32ef2b8423a3468bb0f94e597f9ff3f5c1c9 100644
--- a/metadata/lib.rs
+++ b/metadata/lib.rs
@@ -52,6 +52,8 @@
 //! let json = serde_json::to_value(&metadata).unwrap();
 //! ```
 
+#![deny(unused_crate_dependencies)]
+
 mod byte_str;
 
 use semver::Version;
diff --git a/src/main.rs b/src/main.rs
index eee5661567f22089cd096294018f2e54831a84d5..af5039b89388bc5eeff5a2be8cd945d61d1564f2 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -14,6 +14,8 @@
 // You should have received a copy of the GNU General Public License
 // along with cargo-contract.  If not, see <http://www.gnu.org/licenses/>.
 
+#![deny(unused_crate_dependencies)]
+
 mod cmd;
 mod crate_metadata;
 mod util;