diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 05583ad..430370c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -12,20 +12,20 @@ jobs:
     strategy:
       matrix:
         env:
-          - sdk: iphonesimulator13.0
-            destination: platform=iOS Simulator,name=iPhone 11 Pro,OS=13.0
+          - sdk: iphonesimulator
+            destination: platform=iOS Simulator,name=iPhone 12 Pro,OS=latest
 
-          - sdk: macosx10.15
+          - sdk: macosx
             destination: arch=x86_64
 
-          - sdk: appletvsimulator13.0
-            destination: OS=13.0,name=Apple TV
+          - sdk: appletvsimulator
+            destination: platform=tvOS Simulator,name=Apple TV,OS=latest
 
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v2
 
-    - name: Select Xcode
-      run: sudo xcode-select -s /Applications/Xcode_11.app
+    - name: Select Xcode 12.4
+      run: sudo xcode-select -s /Applications/Xcode_12.4.app
 
     - name: Generate Xcode Project
       run: swift package generate-xcodeproj --enable-code-coverage
diff --git a/Package.swift b/Package.swift
index 201276f..478eb94 100644
--- a/Package.swift
+++ b/Package.swift
@@ -1,17 +1,18 @@
-// swift-tools-version:5.1
+// swift-tools-version:5.3
 
 import PackageDescription
 
 let package = Package(
   name: "WeakMapTable",
   platforms: [
-    .macOS(.v10_11), .iOS(.v8), .tvOS(.v9), .watchOS(.v3)
+    .macOS(.v10_11), .iOS(.v9), .tvOS(.v9), .watchOS(.v3)
   ],
   products: [
     .library(name: "WeakMapTable", targets: ["WeakMapTable"]),
   ],
   targets: [
-    .target( name: "WeakMapTable", dependencies: []),
+    .target(name: "WeakMapTable", dependencies: []),
     .testTarget(name: "WeakMapTableTests", dependencies: ["WeakMapTable"]),
-  ]
+  ],
+  swiftLanguageVersions: [.v5]
 )
diff --git a/WeakMapTable.podspec b/WeakMapTable.podspec
index 0be66cf..13fad94 100644
--- a/WeakMapTable.podspec
+++ b/WeakMapTable.podspec
@@ -11,7 +11,7 @@ Pod::Spec.new do |s|
   s.frameworks   = "Foundation"
   s.swift_version = "5.1"
 
-  s.ios.deployment_target = "8.0"
+  s.ios.deployment_target = "9.0"
   s.osx.deployment_target = "10.11"
   s.tvos.deployment_target = "9.0"
   s.watchos.deployment_target = "3.0"