diff --git a/.github/workflows/unit.yml b/.github/workflows/unit.yml
index 6b91e79..f5e86f1 100644
--- a/.github/workflows/unit.yml
+++ b/.github/workflows/unit.yml
@@ -8,11 +8,31 @@ on:
   workflow_dispatch:
 
 jobs:
-  build-and-test:
-    runs-on: macos-latest
+  build-and-test-macos-13:
+    runs-on: macos-13
     strategy:
       matrix:
-        swift: ['5.8', '5.9', '5.10', '6.0']
+        swift: ['5.7', '5.8', '5.9']
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v4
+
+    - name: Setup Swift
+      uses: SwiftyLab/setup-swift@latest
+      with:
+        swift-version: ${{ matrix.swift }}
+
+    - name: Build and Test
+      run: |
+        swift build
+        swift test
+
+  build-and-test-macos-14:
+    runs-on: macos-14
+    strategy:
+      matrix:
+        swift: ['5.10', '6.0']
 
     steps:
     - name: Checkout
diff --git a/Package.swift b/Package.swift
index 6629b7f..642ead3 100644
--- a/Package.swift
+++ b/Package.swift
@@ -1,4 +1,4 @@
-// swift-tools-version: 5.7.1
+// swift-tools-version: 5.7
 // The swift-tools-version declares the minimum version of Swift required to build this package.
 
 import PackageDescription
diff --git a/README.md b/README.md
index 763ea59..b76ab00 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@ Nostr SDK for Apple Platforms is a native Swift library that enables developers
 
 ## Minimum Requirements
 
-- Swift 5.8
+- Swift 5.7
 - iOS 15
 - macOS 12