diff --git a/Cargo.toml b/Cargo.toml
index fcf6cbe..15c26fa 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -7,6 +7,7 @@ authors = [
     "Thom Chiovoloni <chiovolonit@gmail.com>",
 ]
 edition = "2018"
+rust-version = "1.64"
 repository = "https://github.com/purpleprotocol/mimalloc_rust"
 keywords = ["mimalloc", "allocator", "encrypted-heap", "performance"]
 categories = ["memory-management", "api-bindings"]
diff --git a/README.md b/README.md
index 4587cf2..cf7f2b5 100644
--- a/README.md
+++ b/README.md
@@ -1,8 +1,8 @@
 # Mimalloc Rust
 
-[![Latest Version]][crates.io] [![Documentation]][docs.rs]
+[![Latest Version]][crates.io] [![MSRV]][crates.io] [![Documentation]][docs.rs]
 
-A drop-in global allocator wrapper around the [mimalloc](https://github.com/microsoft/mimalloc) allocator.
+A drop-in global allocator wrapper around the [mimalloc][gh-mimalloc] allocator.
 Mimalloc is a general purpose, performance oriented allocator built by Microsoft.
 
 ## Usage
@@ -16,18 +16,18 @@ static GLOBAL: MiMalloc = MiMalloc;
 
 ## Requirements
 
-A __C__ compiler is required for building [mimalloc](https://github.com/microsoft/mimalloc) with cargo.
+A __C__ compiler is required for building [mimalloc][gh-mimalloc] with cargo.
 
 ## Usage with secure mode
 
 Using secure mode adds guard pages,
 randomized allocation, encrypted free lists, etc. The performance penalty is usually
-around 10% according to [mimalloc](https://github.com/microsoft/mimalloc)
+around 10% according to [mimalloc][gh-mimalloc]
 own benchmarks.
 
 To enable secure mode, put in `Cargo.toml`:
 
-```ini
+```toml
 [dependencies]
 mimalloc = { version = "*", features = ["secure"] }
 ```
@@ -37,7 +37,7 @@ mimalloc = { version = "*", features = ["secure"] }
 By default this library uses mimalloc `v3`.
 To use MiMalloc `v2`, write in `Cargo.toml`:
 
-```ini
+```toml
 [dependencies]
 mimalloc = { version = "*", features = ["v2"] }
 ```
@@ -46,3 +46,6 @@ mimalloc = { version = "*", features = ["v2"] }
 [Latest Version]: https://img.shields.io/crates/v/mimalloc.svg
 [Documentation]: https://docs.rs/mimalloc/badge.svg
 [docs.rs]: https://docs.rs/mimalloc
+[MSRV]: https://img.shields.io/crates/msrv/mimalloc.svg
+
+[gh-mimalloc]: https://github.com/microsoft/mimalloc
\ No newline at end of file
diff --git a/libmimalloc-sys/Cargo.toml b/libmimalloc-sys/Cargo.toml
index 5e97b9b..26894a1 100644
--- a/libmimalloc-sys/Cargo.toml
+++ b/libmimalloc-sys/Cargo.toml
@@ -3,6 +3,7 @@ name = "libmimalloc-sys"
 version = "0.1.49"
 authors = ["Octavian Oncescu <octavonce@gmail.com>"]
 edition = "2018"
+rust-version = "1.64"
 repository = "https://github.com/purpleprotocol/mimalloc_rust/tree/master/libmimalloc-sys"
 keywords = ["allocator", "encrypted-heap", "performance"]
 categories = ["memory-management", "api-bindings"]
@@ -31,7 +32,7 @@ cty = { version = "0.2", optional = true }
 libc = "0.2"
 
 [build-dependencies]
-cc = "1.2"
+cc = "1.4"
 
 [features]
 secure = []