diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index eeb91ff..4b365cc 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -7,5 +7,5 @@ jobs:
     - uses: actions/checkout@v2.3.3
     - name: Run tests
       env: 
-        DEVELOPER_DIR: /Applications/Xcode_11.6.app
+        DEVELOPER_DIR: /Applications/Xcode_12.app
       run: swift test
diff --git a/.swift-version b/.swift-version
index ef425ca..d346e2a 100644
--- a/.swift-version
+++ b/.swift-version
@@ -1 +1 @@
-5.2
+5.3
diff --git a/Package.swift b/Package.swift
index 36bad7f..cf45f0f 100644
--- a/Package.swift
+++ b/Package.swift
@@ -1,4 +1,4 @@
-// swift-tools-version:5.2
+// swift-tools-version:5.3
 import PackageDescription
 
 let package = Package(
diff --git a/README.md b/README.md
index 677228c..c669af2 100644
--- a/README.md
+++ b/README.md
@@ -35,7 +35,7 @@ mint install RobotsAndPencils/xcodes
 <details>
 <summary>Build from source</summary>
 
-Building from source requires Xcode 11.0 or later, so it's not an option for setting up a computer from scratch.
+Building from source requires Xcode 12.0 or later, so it's not an option for setting up a computer from scratch.
 
 ```sh
 git clone https://github.com/RobotsAndPencils/xcodes
@@ -98,7 +98,7 @@ Xcode 11.2.0 has been installed to /Applications/Xcode-11.2.0.app
 
 ## Development
 
-You'll need Xcode 11 in order to build and run xcodes. 
+You'll need Xcode 12 in order to build and run xcodes. 
 
 <details>
 <summary>Using Xcode</summary>