diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 4b0c6b0bd..9c8ee4fc7 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -7,7 +7,7 @@ on:
   pull_request: {}
 
 env:
-  MSRV: 1.64.0
+  MSRV: 1.63.0
 
 jobs:
   check-stable:
diff --git a/Cargo.toml b/Cargo.toml
index bbea40253..b7d4757b8 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,23 +6,3 @@ members = [
   "tower-service",
   "tower-test",
 ]
-
-[workspace.dependencies]
-futures = "0.3.22"
-futures-core = "0.3.22"
-futures-util = { version = "0.3.22", default-features = false }
-hdrhistogram = { version = "7.0", default-features = false }
-http = "0.2"
-indexmap = "2.0.2"
-lazy_static = "1.4.0"
-pin-project-lite = "0.2.7"
-quickcheck = "1"
-rand = "0.8"
-slab = "0.4"
-sync_wrapper = "0.1.1"
-tokio = "1.6.2"
-tokio-stream = "0.1.0"
-tokio-test = "0.4"
-tokio-util = { version = "0.7.0", default-features = false }
-tracing = { version = "0.1.2", default-features = false }
-tracing-subscriber = { version = "0.3", default-features = false }
diff --git a/README.md b/README.md
index c250b1cee..a0716a42f 100644
--- a/README.md
+++ b/README.md
@@ -33,7 +33,7 @@ pattern. If your protocol is entirely stream based, Tower may not be a good fit.
 
 Tower will keep a rolling MSRV (minimum supported Rust version) policy of **at
 least** 6 months. When increasing the MSRV, the new Rust version must have been
-released at least six months ago. The current MSRV is 1.64.0.
+released at least six months ago. The current MSRV is 1.63.0.
 
 ## Getting Started
 
diff --git a/tower-service/Cargo.toml b/tower-service/Cargo.toml
index 7f9be7399..9e9da023d 100644
--- a/tower-service/Cargo.toml
+++ b/tower-service/Cargo.toml
@@ -22,7 +22,7 @@ edition = "2018"
 [dependencies]
 
 [dev-dependencies]
-http = { workspace = true }
+http = "0.2"
 tower-layer = { version = "0.3", path = "../tower-layer" }
-tokio = { workspace = true, features = ["macros", "time"] }
-futures = { workspace = true }
+tokio = { version = "1.6.2", features = ["macros", "time"] }
+futures = "0.3.22"
diff --git a/tower-test/Cargo.toml b/tower-test/Cargo.toml
index 24c7d7e22..8f00b2530 100644
--- a/tower-test/Cargo.toml
+++ b/tower-test/Cargo.toml
@@ -20,12 +20,12 @@ categories = ["asynchronous", "network-programming"]
 edition = "2018"
 
 [dependencies]
-futures-util = { workspace = true }
-tokio = { workspace = true, features = ["sync"] }
-tokio-test = { workspace = true }
+futures-util = "0.3.22"
+tokio = { version = "1.6.2", features = ["sync"] }
+tokio-test = "0.4"
 tower-layer = { version = "0.3", path = "../tower-layer" }
 tower-service = { version = "0.3", path = "../tower-service" }
-pin-project-lite = { workspace = true }
+pin-project-lite = "0.2.7"
 
 [dev-dependencies]
-tokio = { workspace = true, features = ["macros"] }
+tokio = { version = "1.6.2", features = ["macros"] }
diff --git a/tower/Cargo.toml b/tower/Cargo.toml
index 6e810b3cb..d551fb7c8 100644
--- a/tower/Cargo.toml
+++ b/tower/Cargo.toml
@@ -17,7 +17,7 @@ clients and servers.
 categories = ["asynchronous", "network-programming"]
 keywords = ["io", "async", "non-blocking", "futures", "service"]
 edition = "2018"
-rust-version = "1.64.0"
+rust-version = "1.63.0"
 
 [features]
 
@@ -65,32 +65,32 @@ util = ["__common", "futures-util", "pin-project-lite", "sync_wrapper"]
 tower-layer = { version = "0.3.3", path = "../tower-layer" }
 tower-service = { version = "0.3.3", path = "../tower-service" }
 
-futures-core = { workspace = true, optional = true }
-futures-util = { workspace = true, features = ["alloc"], optional = true }
-hdrhistogram = { workspace = true, optional = true }
-indexmap = { workspace = true, optional = true }
-slab = { workspace = true, optional = true }
-tokio = { workspace = true, features = ["sync"], optional = true }
-tokio-stream = { workspace = true, optional = true }
-tokio-util = { workspace = true, optional = true }
-tracing = { workspace = true, features = ["std"], optional = true }
-pin-project-lite = { workspace = true, optional = true }
-sync_wrapper = { workspace = true, optional = true }
+futures-core = { version = "0.3.22", optional = true }
+futures-util = { version = "0.3.22", features = ["alloc"], optional = true }
+hdrhistogram = { version = "7.0", default-features = false, optional = true }
+indexmap = { version = "2.0.2", optional = true }
+slab = { version = "0.4", optional = true }
+tokio = { version = "1.6.2", features = ["sync"], optional = true }
+tokio-stream = { version = "0.1.0", optional = true }
+tokio-util = { version = "0.7.0", optional = true }
+tracing = { version = "0.1.2", default-features = false, features = ["std"], optional = true }
+pin-project-lite = { version = "0.2.7", optional = true }
+sync_wrapper = { version = "0.1.1", optional = true }
 
 [dev-dependencies]
-futures = { workspace = true }
-hdrhistogram = { workspace = true }
-pin-project-lite = { workspace = true }
-tokio = { workspace = true, features = ["macros", "sync", "test-util", "rt-multi-thread"] }
-tokio-stream = { workspace = true }
-tokio-test = { workspace = true }
+futures = "0.3.22"
+hdrhistogram = { version = "7.0", default-features = false }
+pin-project-lite = "0.2.7"
+tokio = { version = "1.6.2", features = ["macros", "sync", "test-util", "rt-multi-thread"] }
+tokio-stream = "0.1.0"
+tokio-test = "0.4"
 tower-test = { version = "0.4", path = "../tower-test" }
-tracing = { workspace = true, features = ["std"] }
-tracing-subscriber = { workspace = true, features = ["fmt", "ansi"] }
-http = { workspace = true }
-lazy_static = { workspace = true }
-rand = { workspace = true, features = ["small_rng"] }
-quickcheck = { workspace = true }
+tracing = { version = "0.1.2", default-features = false, features = ["std"] }
+tracing-subscriber = { version = "0.3", default-features = false, features = ["fmt", "ansi"] }
+http = "0.2"
+lazy_static = "1.4.0"
+rand = { version = "0.8", features = ["small_rng"] }
+quickcheck = "1"
 
 [package.metadata.docs.rs]
 all-features = true
diff --git a/tower/README.md b/tower/README.md
index fa9e208d6..bd7817d1d 100644
--- a/tower/README.md
+++ b/tower/README.md
@@ -174,7 +174,7 @@ Tower.
 
 Tower will keep a rolling MSRV (minimum supported Rust version) policy of **at
 least** 6 months. When increasing the MSRV, the new Rust version must have been
-released at least six months ago. The current MSRV is 1.64.0.
+released at least six months ago. The current MSRV is 1.63.0.
 
 ## License
 
diff --git a/tower/src/lib.rs b/tower/src/lib.rs
index 179edfbec..003ebcee6 100644
--- a/tower/src/lib.rs
+++ b/tower/src/lib.rs
@@ -144,7 +144,7 @@
 //!
 //! Tower will keep a rolling MSRV (minimum supported Rust version) policy of **at
 //! least** 6 months. When increasing the MSRV, the new Rust version must have been
-//! released at least six months ago. The current MSRV is 1.64.0.
+//! released at least six months ago. The current MSRV is 1.63.0.
 //!
 //! [`Service`]: crate::Service
 //! [`Layer`]: crate::Layer