diff --git a/CHANGELOG.md b/CHANGELOG.md
index afe906514e8..144292117fa 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,7 @@
 
 ## **[Unreleased]**
 
+- [#940](https://github.com/wasmerio/wasmer/pull/940) Update supported Rust version to 1.38+
 - [#921](https://github.com/wasmerio/wasmer/pull/921) In LLVM backend, annotate all memory accesses with TBAA metadata.
 - [#883](https://github.com/wasmerio/wasmer/pull/883) Allow floating point operations to have arbitrary inputs, even including SNaNs.
 - [#856](https://github.com/wasmerio/wasmer/pull/856) Expose methods in the runtime C API to get a WASI import object
diff --git a/Cargo.toml b/Cargo.toml
index 2a47f943de4..0fe11919fb9 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -7,6 +7,7 @@ repository = "https://github.com/wasmerio/wasmer"
 publish = true
 description = "High-Performance WebAssembly JIT interpreter"
 license = "MIT"
+default-run = "wasmer"
 include = [
     "examples/**/*",
     "src/**/*",
diff --git a/README.md b/README.md
index 7e7f39cb154..98533edf91b 100644
--- a/README.md
+++ b/README.md
@@ -181,7 +181,7 @@ nginx and Lua do not work on Windows - you can track the progress on [this issue
 
 ## Building
 
-[![Rustc Version 1.37+](https://img.shields.io/badge/rustc-1.37+-red.svg?style=flat-square)](https://blog.rust-lang.org/2019/08/15/Rust-1.37.0.html)
+[![Rustc Version 1.38+](https://img.shields.io/badge/rustc-1.37+-red.svg?style=flat-square)](https://blog.rust-lang.org/2019/09/26/Rust-1.38.0.html)
 
 Wasmer is built with [Cargo](https://crates.io/), the Rust package manager.
 
diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index db05b2d340d..f86ead33af9 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -22,7 +22,7 @@ jobs:
       - script: cargo fmt --all -- --check
         displayName: Lint
     variables:
-      rust_toolchain: '1.37.0'
+      rust_toolchain: '1.38.0'
 
   - job: Test
     strategy:
@@ -39,7 +39,7 @@ jobs:
           CARGO_HTTP_CHECK_REVOKE: false
         windows:
           imageName: "vs2017-win2016"
-          rust_toolchain: '1.37.0'
+          rust_toolchain: '1.38.0'
     pool:
       vmImage: $(imageName)
     condition: in(variables['Build.SourceBranch'], 'refs/heads/master', 'refs/heads/staging', 'refs/heads/trying')
@@ -100,7 +100,7 @@ jobs:
           MACOSX_DEPLOYMENT_TARGET: 10.10
         windows:
           imageName: "vs2017-win2016"
-          rust_toolchain: '1.37.0'
+          rust_toolchain: '1.38.0'
           # RUSTFLAGS: -Ctarget-feature=+crt-static
     pool:
       vmImage: $(imageName)
@@ -163,7 +163,7 @@ jobs:
           MACOSX_DEPLOYMENT_TARGET: 10.10
         windows:
           imageName: "vs2017-win2016"
-          rust_toolchain: '1.37.0'
+          rust_toolchain: '1.38.0'
           # RUSTFLAGS: -Ctarget-feature=+crt-static
     pool:
       vmImage: $(imageName)