diff --git a/lambda-extension/Cargo.toml b/lambda-extension/Cargo.toml
index 05f1d6f7..f5b101c1 100644
--- a/lambda-extension/Cargo.toml
+++ b/lambda-extension/Cargo.toml
@@ -24,8 +24,6 @@ tokio-stream = "0.1.2"
 lambda_runtime_api_client = { version = "0.4", path = "../lambda-runtime-api-client" }
 
 [dev-dependencies]
-tracing-subscriber = "0.3"
-once_cell = "1.4.0"
 simple_logger = "1.6.0"
 log = "^0.4"
 simple-error = "0.2"
diff --git a/lambda-runtime-api-client/Cargo.toml b/lambda-runtime-api-client/Cargo.toml
index 48188a91..36aa0781 100644
--- a/lambda-runtime-api-client/Cargo.toml
+++ b/lambda-runtime-api-client/Cargo.toml
@@ -15,8 +15,3 @@ http = "0.2"
 hyper = { version = "0.14", features = ["http1", "client", "server", "stream", "runtime"] }
 tower-service = "0.3"
 tokio = { version = "1.0", features = ["io-util"] }
-
-[dev-dependencies]
-serde_json = "^1"
-async-stream = "0.3"
-tokio-stream = "0.1.2"
\ No newline at end of file
diff --git a/lambda-runtime/Cargo.toml b/lambda-runtime/Cargo.toml
index 25bc26ec..3e567ed9 100644
--- a/lambda-runtime/Cargo.toml
+++ b/lambda-runtime/Cargo.toml
@@ -22,16 +22,12 @@ serde_json = "^1"
 bytes = "1.0"
 http = "0.2"
 async-stream = "0.3"
-futures = "0.3"
-tracing-error = "0.2"
 tracing = { version = "0.1", features = ["log"] }
 tower-service = "0.3"
 tokio-stream = "0.1.2"
 lambda_runtime_api_client = { version = "0.4", path = "../lambda-runtime-api-client" }
 
 [dev-dependencies]
-tracing-subscriber = "0.3"
-once_cell = "1.4.0"
 simple_logger = "1.6.0"
 log = "^0.4"
 simple-error = "0.2"