diff --git a/tower-balance/Cargo.toml b/tower-balance/Cargo.toml
index 4071435..d4c1966 100644
--- a/tower-balance/Cargo.toml
+++ b/tower-balance/Cargo.toml
@@ -26,8 +26,8 @@ log = ["tracing/log"]
 default = ["log"]
 
 [dependencies]
-futures-util = { version = "0.3", default-features = false, features = ["alloc"] } 
-futures-core = "0.3"
+futures-util = { version = "0.3", default-features = false } 
+futures-core = { version = "0.3", default-features = false }
 pin-project = "0.4"
 indexmap = "1.0.2"
 tracing = "0.1"
diff --git a/tower-buffer/Cargo.toml b/tower-buffer/Cargo.toml
index 28354f3..c3d484a 100644
--- a/tower-buffer/Cargo.toml
+++ b/tower-buffer/Cargo.toml
@@ -26,7 +26,7 @@ log = ["tracing/log"]
 default = ["log"]
 
 [dependencies]
-futures-core = "0.3"
+futures-core = { version = "0.3", default-features = false }
 pin-project = "0.4"
 tower-service = "0.3"
 tower-layer = "0.3"
diff --git a/tower-discover/Cargo.toml b/tower-discover/Cargo.toml
index 827403a..8eb226b 100644
--- a/tower-discover/Cargo.toml
+++ b/tower-discover/Cargo.toml
@@ -22,6 +22,6 @@ categories = ["asynchronous", "network-programming"]
 edition = "2018"
 
 [dependencies]
-futures-core = "0.3"
+futures-core = { version = "0.3", default-features = false }
 tower-service = "0.3"
 pin-project = "0.4"
diff --git a/tower-filter/Cargo.toml b/tower-filter/Cargo.toml
index 269ced1..3469057 100644
--- a/tower-filter/Cargo.toml
+++ b/tower-filter/Cargo.toml
@@ -27,9 +27,9 @@ publish = false
 tower-service = "0.3"
 tower-layer = "0.3"
 pin-project = "0.4"
-futures-core = "0.3"
+futures-core = { version = "0.3", default-features = false }
 
 [dev-dependencies]
 tower-test = { version = "0.3", path = "../tower-test" }
-futures-util = "0.3"
+futures-util = { version = "0.3", default-features = false, features = ["alloc"] }
 tokio = { version = "0.2", features = ["macros", "sync"] }
diff --git a/tower-hedge/Cargo.toml b/tower-hedge/Cargo.toml
index 608734c..c6a84ed 100644
--- a/tower-hedge/Cargo.toml
+++ b/tower-hedge/Cargo.toml
@@ -11,7 +11,7 @@ log = "0.4.1"
 tower-service = "0.3"
 tower-filter = { version = "0.3", path = "../tower-filter" }
 tokio = { version = "0.2", features = ["time"] }
-futures-util = "0.3"
+futures-util = { version = "0.3", default-features = false }
 pin-project = "0.4"
 
 [dev-dependencies]
diff --git a/tower-limit/Cargo.toml b/tower-limit/Cargo.toml
index 2e10de6..3fb9159 100644
--- a/tower-limit/Cargo.toml
+++ b/tower-limit/Cargo.toml
@@ -22,7 +22,7 @@ categories = ["asynchronous", "network-programming"]
 edition = "2018"
 
 [dependencies]
-futures-core = "0.3"
+futures-core = { version = "0.3", default-features = false }
 tower-service = "0.3"
 tower-layer = "0.3"
 tokio = { version = "0.2", features = ["time"] }
diff --git a/tower-load-shed/Cargo.toml b/tower-load-shed/Cargo.toml
index 7312e77..ee5ce3b 100644
--- a/tower-load-shed/Cargo.toml
+++ b/tower-load-shed/Cargo.toml
@@ -26,7 +26,7 @@ edition = "2018"
 tower-service = "0.3"
 tower-layer = "0.3"
 pin-project = "0.4"
-futures-core = "0.3"
+futures-core = { version = "0.3", default-features = false }
 
 [dev-dependencies]
 tokio-test = "0.2"
diff --git a/tower-load/Cargo.toml b/tower-load/Cargo.toml
index 686b7aa..7b698aa 100644
--- a/tower-load/Cargo.toml
+++ b/tower-load/Cargo.toml
@@ -22,7 +22,7 @@ categories = ["asynchronous", "network-programming"]
 edition = "2018"
 
 [dependencies]
-futures-core = "0.3"
+futures-core = { version = "0.3", default-features = false }
 log = "0.4.1"
 tokio = { version = "0.2", features = ["time"] }
 tower-service = "0.3"
@@ -32,4 +32,4 @@ pin-project = "0.4"
 [dev-dependencies]
 tokio-test = "0.2"
 tokio = { version = "0.2", features = ["macros", "test-util" ] }
-futures-util = "0.3"
+futures-util = { version = "0.3", default-features = false }
diff --git a/tower-ready-cache/Cargo.toml b/tower-ready-cache/Cargo.toml
index 58d34f3..80936b5 100644
--- a/tower-ready-cache/Cargo.toml
+++ b/tower-ready-cache/Cargo.toml
@@ -22,8 +22,8 @@ categories = ["asynchronous", "network-programming"]
 edition = "2018"
 
 [dependencies]
-futures-core = "0.3"
-futures-util = "0.3"
+futures-core = { version = "0.3", default-features = false }
+futures-util = { version = "0.3", default-features = false, features = ["alloc"] }
 indexmap = "1.0.2"
 log = "0.4.1"
 tokio = { version = "0.2", features = ["sync"] } 
diff --git a/tower-retry/Cargo.toml b/tower-retry/Cargo.toml
index c68f3ad..71c48cc 100644
--- a/tower-retry/Cargo.toml
+++ b/tower-retry/Cargo.toml
@@ -26,10 +26,10 @@ tower-service = "0.3"
 tower-layer = "0.3"
 tokio = { version = "0.2", features = ["time"] }
 pin-project = "0.4"
-futures-core = "0.3"
+futures-core = { version = "0.3", default-features = false }
 
 [dev-dependencies]
 tower-test = { version = "0.3", path = "../tower-test" }
 tokio = { version  = "0.2", features = ["macros", "test-util"] }
 tokio-test = "0.2"
-futures-util = "0.3"
+futures-util = { version = "0.3", default-features = false }
diff --git a/tower-spawn-ready/Cargo.toml b/tower-spawn-ready/Cargo.toml
index a6f2524..925b27f 100644
--- a/tower-spawn-ready/Cargo.toml
+++ b/tower-spawn-ready/Cargo.toml
@@ -22,8 +22,8 @@ categories = ["asynchronous", "network-programming"]
 edition = "2018"
 
 [dependencies]
-futures-core = "0.3"
-futures-util = "0.3"
+futures-core = { version = "0.3", default-features = false }
+futures-util = { version = "0.3", default-features = false }
 pin-project = "0.4"
 tower-service = "0.3"
 tower-layer = "0.3"
diff --git a/tower-test/Cargo.toml b/tower-test/Cargo.toml
index 7fe9b9b..e812179 100644
--- a/tower-test/Cargo.toml
+++ b/tower-test/Cargo.toml
@@ -22,7 +22,7 @@ categories = ["asynchronous", "network-programming"]
 edition = "2018"
 
 [dependencies]
-futures-util = "0.3"
+futures-util = { version = "0.3", default-features = false }
 tokio = { version = "0.2", features = ["sync"]}
 tower-layer = "0.3"
 tokio-test = "0.2"
diff --git a/tower-util/Cargo.toml b/tower-util/Cargo.toml
index 215a643..81e0fc1 100644
--- a/tower-util/Cargo.toml
+++ b/tower-util/Cargo.toml
@@ -32,7 +32,7 @@ futures-core = { version = "0.3", default-features = false }
 
 # Optional
 
-futures-util = { version = "0.3", optional = true, default-features = false }
+futures-util = { version = "0.3", optional = true, default-features = false, features = ["alloc"] }
 
 [dev-dependencies]
 tokio-test = "0.2"
diff --git a/tower/Cargo.toml b/tower/Cargo.toml
index 80cb808..5858a51 100644
--- a/tower/Cargo.toml
+++ b/tower/Cargo.toml
@@ -37,11 +37,11 @@ tower-retry = { version = "0.3", path = "../tower-retry" }
 tower-service = "0.3"
 tower-timeout = { version = "0.3", path = "../tower-timeout" }
 tower-util = { version = "0.3", path = "../tower-util", features = ["call-all"] }
-futures-core = "0.3"
+futures-core = { version = "0.3", default-features = false }
 
 [dev-dependencies]
 # env_logger = { version = "0.5.3", default-features = false }
-futures-util = "0.3"
+futures-util = { version = "0.3", default-features = false }
 tokio = { version = "0.2", features = ["macros"] }
 # log = "0.4.1"
 # # tokio = "0.2"