diff --git a/.github/workflows/msrv.yml b/.github/workflows/msrv.yml
index 4ac968a4b..24e04f556 100644
--- a/.github/workflows/msrv.yml
+++ b/.github/workflows/msrv.yml
@@ -8,7 +8,7 @@ jobs:
       fail-fast: false
       matrix:
         version:
-          - 1.39.0
+          - 1.40.0
 
     name: ${{ matrix.version }} - x86_64-unknown-linux-gnu
     runs-on: ubuntu-latest
@@ -30,8 +30,8 @@ jobs:
           profile: minimal
           override: true
 
-      - name: tests (1.39.0)
-        if: matrix.version == '1.39.0'
+      - name: tests (1.40.0)
+        if: matrix.version == '1.40.0'
         uses: actions-rs/cargo@v1
         timeout-minutes: 40
         with:
diff --git a/actix-cors/CHANGES.md b/actix-cors/CHANGES.md
index 8d2a209d0..becc88027 100644
--- a/actix-cors/CHANGES.md
+++ b/actix-cors/CHANGES.md
@@ -1,5 +1,9 @@
 # Changes
 
+## [unreleased]
+
+* Minimum supported Rust version(MSRV) is now 1.40.0.
+
 ## [0.3.0-alpha.1] - 2020-03-11
 
 * Minimize `futures-*` dependencies
diff --git a/actix-cors/README.md b/actix-cors/README.md
index 6cb3666e9..c295a64ec 100644
--- a/actix-cors/README.md
+++ b/actix-cors/README.md
@@ -14,4 +14,4 @@
 * [API Documentation](https://docs.rs/actix-cors/)
 * [Chat on gitter](https://gitter.im/actix/actix)
 * Cargo package: [actix-cors](https://crates.io/crates/actix-cors)
-* Minimum supported Rust version: 1.39.0 or later
+* Minimum supported Rust version: 1.40.0 or later
diff --git a/actix-identity/CHANGES.md b/actix-identity/CHANGES.md
index a575c2840..3789f22ba 100644
--- a/actix-identity/CHANGES.md
+++ b/actix-identity/CHANGES.md
@@ -1,5 +1,9 @@
 # Changes
 
+## [unreleased]
+
+* Minimum supported Rust version(MSRV) is now 1.40.0.
+
 ## [0.3.0-alpha.1] - 2020-03-14
 
 * Update the `time` dependency to 0.2.7
diff --git a/actix-identity/README.md b/actix-identity/README.md
index 73e049122..16c87c1bc 100644
--- a/actix-identity/README.md
+++ b/actix-identity/README.md
@@ -16,4 +16,4 @@
 * [API Documentation](https://docs.rs/actix-identity/)
 * [Chat on gitter](https://gitter.im/actix/actix)
 * Cargo package: [actix-identity](https://crates.io/crates/actix-identity)
-* Minimum supported Rust version: 1.39 or later
+* Minimum supported Rust version: 1.40 or later
diff --git a/actix-protobuf/CHANGES.md b/actix-protobuf/CHANGES.md
index 56206f87a..37cd39cd8 100644
--- a/actix-protobuf/CHANGES.md
+++ b/actix-protobuf/CHANGES.md
@@ -1,5 +1,9 @@
 # Changes
 
+## unreleased (for alpha version)
+
+* Minimum supported Rust version(MSRV) is now 1.40.0.
+
 ## 0.5.1 (2019-02-17)
 
 * Move repository to actix-extras
diff --git a/actix-protobuf/README.md b/actix-protobuf/README.md
index 5b22ee337..a02048aab 100644
--- a/actix-protobuf/README.md
+++ b/actix-protobuf/README.md
@@ -8,7 +8,7 @@
 
 > Protobuf support for actix-web framework.
 
-* Minimum supported Rust version: 1.39.0 or later
+* Minimum supported Rust version: 1.40.0 or later
 
 ## Example
 
diff --git a/actix-redis/CHANGES.md b/actix-redis/CHANGES.md
index 9281c037c..5cbc47b24 100644
--- a/actix-redis/CHANGES.md
+++ b/actix-redis/CHANGES.md
@@ -11,6 +11,8 @@
 
 * Update `tokio-util` to 0.3
 
+* Minimum supported Rust version(MSRV) is now 1.40.0.
+
 ## [0.9.0-alpha.1]
 
 * Update `actix` to 0.10.0-alpha.2
diff --git a/actix-redis/README.md b/actix-redis/README.md
index e4f3e0639..ef5392ca8 100644
--- a/actix-redis/README.md
+++ b/actix-redis/README.md
@@ -13,7 +13,7 @@
 * [API Documentation](https://actix.rs/actix-extras/actix_redis/)
 * [Chat on gitter](https://gitter.im/actix/actix)
 * Cargo package: [actix-redis](https://crates.io/crates/actix-redis)
-* Minimum supported Rust version: 1.39 or later
+* Minimum supported Rust version: 1.40 or later
 
 ## Redis session backend
 
diff --git a/actix-session/CHANGES.md b/actix-session/CHANGES.md
index ba51f4c8f..3a42fc26d 100644
--- a/actix-session/CHANGES.md
+++ b/actix-session/CHANGES.md
@@ -1,5 +1,9 @@
 # Changes
 
+## unreleased
+
+* Minimum supported Rust version(MSRV) is now 1.40.0.
+
 ## [0.4.0-alpha.1] - 2020-03-14
 
 * Update the `time` dependency to 0.2.7
diff --git a/actix-session/README.md b/actix-session/README.md
index a4d435795..4c2ae212e 100644
--- a/actix-session/README.md
+++ b/actix-session/README.md
@@ -16,4 +16,4 @@
 * [API Documentation](https://docs.rs/actix-session/)
 * [Chat on gitter](https://gitter.im/actix/actix)
 * Cargo package: [actix-session](https://crates.io/crates/actix-session)
-* Minimum supported Rust version: 1.34 or later
+* Minimum supported Rust version: 1.40 or later
diff --git a/actix-web-httpauth/CHANGES.md b/actix-web-httpauth/CHANGES.md
index 0bccda234..74e300883 100644
--- a/actix-web-httpauth/CHANGES.md
+++ b/actix-web-httpauth/CHANGES.md
@@ -5,6 +5,10 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## unreleased (for alpha version)
+
+* Minimum supported Rust version(MSRV) is now 1.40.0.
+
 ## [unreleased]
   - Update the `base64` dependency to 0.12