diff --git a/Cargo.toml b/Cargo.toml
index b959bb83852325dfdee390cac59616a5fe22a9e3..5d7dba6e6651c71ebdce5fb8dea5e3dbd1d01e17 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -9,21 +9,33 @@ repository = "https://github.com/japaric/blue-pill"
 version = "0.1.0"
 
 [dependencies]
-static-ref = "0.1.0"
-stm32f103xx = "0.6.1"
+static-ref = "0.2.0"
 volatile-register = "0.2.0"
 
 [dependencies.cast]
 default-features = false
 version = "0.2.2"
 
-[dependencies.either]
-default-features = false
-version = "1.1.0"
-
 [dependencies.embedded-hal]
 git = "https://github.com/japaric/embedded-hal"
 rev = "5295697669f5b48a900aa325b8ebb4d4e8d4b236"
 
 [dependencies.nb]
 git = "https://github.com/japaric/nb"
+
+[dependencies.stm32f103xx]
+features = ["rt"]
+version = "0.7.2"
+
+[dev-dependencies]
+cortex-m = "0.3.0"
+cortex-m-rtfm = "0.2.0"
+cortex-m-semihosting = "0.2.0"
+
+[dev-dependencies.cortex-m-rt]
+features = ["abort-on-panic"]
+version = "0.3.5"
+
+[profile.release]
+debug = true
+lto = true