diff --git a/.travis.yml b/.travis.yml
index d26f48d..3faaaa4 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,7 +2,7 @@ language: rust
 cache: cargo
 
 rust:
-  - 1.34.0
+  - 1.37.0
   - stable
   - beta
   - nightly
diff --git a/README.md b/README.md
index e1b5046..41936c4 100644
--- a/README.md
+++ b/README.md
@@ -21,7 +21,7 @@ for bare-metal or WebAssembly programming.
 
 ## Minimum Supported Rust Version
 
-All crates in this repository support Rust **1.34** or higher. In future minimum
+All crates in this repository support Rust **1.37** or higher. In future minimum
 supported Rust version can be changed, but it will be done with the minor
 version bump.
 
diff --git a/ecdsa/README.md b/ecdsa/README.md
index cf35772..ccd1264 100644
--- a/ecdsa/README.md
+++ b/ecdsa/README.md
@@ -24,7 +24,7 @@ ECDSA implementations, including HSMs or Cloud KMS services.
 
 ## Requirements
 
-- Rust **1.34+**
+- Rust **1.37+**
 
 ## License
 
diff --git a/ed25519/README.md b/ed25519/README.md
index 1b0076a..f5ae360 100644
--- a/ed25519/README.md
+++ b/ed25519/README.md
@@ -23,7 +23,7 @@ Ed25519 implementations, including HSMs or Cloud KMS services.
 
 ## Requirements
 
-- Rust **1.34+**
+- Rust **1.37+**
 
 ## License
 
diff --git a/elliptic-curve-crate/README.md b/elliptic-curve-crate/README.md
index deebaba..bfe73d2 100644
--- a/elliptic-curve-crate/README.md
+++ b/elliptic-curve-crate/README.md
@@ -14,7 +14,7 @@ and public/secret keys composed thereof.
 
 ## Minimum Supported Rust Version
 
-All crates in this repository support Rust **1.34** or higher.
+All crates in this repository support Rust **1.37** or higher.
 
 Minimum supported Rust version can be changed in the future, but it will be
 done with a minor version bump.
diff --git a/signature-crate/README.md b/signature-crate/README.md
index 797be8f..b42f687 100644
--- a/signature-crate/README.md
+++ b/signature-crate/README.md
@@ -16,7 +16,7 @@ Support is also planned for the [`ecdsa`][3] and [`rsa`][4] crates.
 
 ## Minimum Supported Rust Version
 
-All crates in this repository support Rust **1.34** or higher.
+All crates in this repository support Rust **1.37** or higher.
 
 Minimum supported Rust version can be changed in the future, but it will be
 done with a minor version bump.