diff --git a/tower-buffer/Cargo.toml b/tower-buffer/Cargo.toml
index 17a46dd..bb1de57 100644
--- a/tower-buffer/Cargo.toml
+++ b/tower-buffer/Cargo.toml
@@ -27,7 +27,7 @@ default = ["log"]
 
 [dependencies]
 futures-core-preview = "0.3.0-alpha.18"
-pin-project = { version = "0.4.0-alpha.9", features = ["project_attr"] }
+pin-project = { version = "0.4.0-alpha.10", features = ["project_attr"] }
 tower-service = "0.3.0-alpha.1"
 tower-layer = { version = "0.3.0-alpha.1", path = "../tower-layer" }
 tokio-executor = "0.2.0-alpha.4"
diff --git a/tower-discover/Cargo.toml b/tower-discover/Cargo.toml
index e87acab..3154652 100644
--- a/tower-discover/Cargo.toml
+++ b/tower-discover/Cargo.toml
@@ -24,4 +24,4 @@ edition = "2018"
 [dependencies]
 futures-core-preview = "0.3.0-alpha.18"
 tower-service = "0.3.0-alpha.1"
-pin-project = "0.4.0-alpha.9"
+pin-project = "0.4.0-alpha.10"
diff --git a/tower-limit/Cargo.toml b/tower-limit/Cargo.toml
index 06a85fc..fc1da2b 100644
--- a/tower-limit/Cargo.toml
+++ b/tower-limit/Cargo.toml
@@ -27,7 +27,7 @@ tower-service = "0.3.0-alpha.1"
 tower-layer = { version = "0.3.0-alpha.1", path = "../tower-layer" }
 tokio-sync = "0.2.0-alpha.4"
 tokio-timer = "0.3.0-alpha.4"
-pin-project = "0.4.0-alpha.9"
+pin-project = "0.4.0-alpha.10"
 
 [dev-dependencies]
 tower-test = { version = "0.3.0-alpha.1", path = "../tower-test" }
diff --git a/tower-load/Cargo.toml b/tower-load/Cargo.toml
index bac8174..ca2d70c 100644
--- a/tower-load/Cargo.toml
+++ b/tower-load/Cargo.toml
@@ -28,7 +28,7 @@ log = "0.4.1"
 tokio-timer = "0.3.0-alpha.4"
 tower-service = "0.3.0-alpha.1"
 tower-discover = { version = "0.3.0-alpha.1", path = "../tower-discover" }
-pin-project = "0.4.0-alpha.9"
+pin-project = "0.4.0-alpha.10"
 
 [dev-dependencies]
 tokio-test = "0.2.0-alpha.4"