diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 9a0a1474..0df13d75 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -4,6 +4,11 @@ on:
   pull_request:
     branches:
       - "*"
+  push:
+    branches:
+      - main
+    tags:
+      - "v+[0-9]+.[0-9]+.[0-9]*$"
 
 # Cancel in-progress workflow runs on new PR commits.
 concurrency:
@@ -17,9 +22,11 @@ jobs:
     steps:
       - uses: actions/checkout@v3
       - name: Set up Python 3.9.5
-        uses: actions/setup-python@v3
+        uses: actions/setup-python@v4
         with:
           python-version: "3.9.5"
+          cache: 'pip'
+          cache-dependency-path: '**/requirements.txt'
       - name: Install tox
         run: |
           # Install tox
@@ -41,9 +48,11 @@ jobs:
     steps:
       - uses: actions/checkout@v3
       - name: Set up Python 3.9.5
-        uses: actions/setup-python@v3
+        uses: actions/setup-python@v4
         with:
           python-version: "3.9.5"
+          cache: 'pip'
+          cache-dependency-path: '**/requirements.txt'
       - name: Install tox
         run: |
           # Install tox
diff --git a/surround/README.md b/surround/README.md
index 1167d6d9..16ebf803 100644
--- a/surround/README.md
+++ b/surround/README.md
@@ -11,7 +11,7 @@ For more information about Surround library, see [Surround Library](https://surr
 ## Installation
 
 ### Prerequisites
-- [Python](https://www.python.org/) 3+ (Tested on 3.6.5)
+- [Python](https://www.python.org/) 3.9+ (Tested on 3.9.5)
 
 Use package manager [pip](https://pip.pypa.io/en/stable/) to install the latest (stable) version:
 ```