diff --git a/.travis.yml b/.travis.yml
index f235c5dd..636893f8 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -21,7 +21,7 @@ matrix:
     - name: Minimum nightly
       python: "3.7"
       # Keep this synced up with build.rs
-      env: TRAVIS_RUST_VERSION=nightly-2019-06-22
+      env: TRAVIS_RUST_VERSION=nightly-2019-07-12
       # Tested via anaconda PyPy (since travis's PyPy version is too old)
     - name: PyPy3.5 7.0
       python: "3.7"
diff --git a/README.md b/README.md
index 4098129f..c6b35fdf 100644
--- a/README.md
+++ b/README.md
@@ -16,7 +16,7 @@ A comparison with rust-cpython can be found [in the guide](https://pyo3.rs/maste
 
 ## Usage
 
-PyO3 supports Python 3.5 and up. The minimum required Rust version is 1.34.0-nightly 2019-02-06.
+PyO3 supports Python 3.5 and up. The minimum required Rust version is 1.37.0-nightly 2019-07-12.
 
 PyPy is also supported (via cpyext) for Python 3.5 only, targeted PyPy version is 7.0.0.
 Please refer to the guide for installation instruction against PyPy.
diff --git a/build.rs b/build.rs
index ea6ff88f..0f31913c 100644
--- a/build.rs
+++ b/build.rs
@@ -16,7 +16,7 @@ use version_check::{Channel, Date, Version};
 /// Specifies the minimum nightly version needed to compile pyo3.
 /// Keep this synced up with the travis ci config,
 /// But note that this is the rustc version which can be lower than the nightly version
-const MIN_DATE: &'static str = "2019-06-21";
+const MIN_DATE: &'static str = "2019-07-11";
 const MIN_VERSION: &'static str = "1.37.0-nightly";
 
 /// Information returned from python interpreter
diff --git a/guide/src/get_started.md b/guide/src/get_started.md
index 3ea2c63e..a7a7652e 100644
--- a/guide/src/get_started.md
+++ b/guide/src/get_started.md
@@ -10,7 +10,7 @@ A comparison with rust-cpython can be found [in the guide](https://pyo3.rs/maste
 
 ## Usage
 
-PyO3 supports Python 3.5 and up. The minimum required Rust version is 1.34.0-nightly 2019-02-06.
+PyO3 supports Python 3.5 and up. The minimum required Rust version is 1.37.0-nightly 2019-07-12.
 
 PyPy is also supported (via cpyext) for Python 3.5 only, targeted PyPy version is 7.0.0.
 Please refer to the guide for installation instruction against PyPy.