diff --git a/.github/workflows/testing.yml b/.github/workflows/testing.yml
index 5422526..fd7b7c0 100644
--- a/.github/workflows/testing.yml
+++ b/.github/workflows/testing.yml
@@ -11,12 +11,30 @@ jobs:
       run: |
         brew install libtool automake cmake carthage go@1.14 swiftlint swiftformat
         gem install bundler
-    - name: Preparing dependencies
+        bundle install
+    - uses: actions/cache@v2
+      id: carthage-cache
+      with:
+        path: Carthage
+        key: ${{ runner.os }}-carthage-${{ hashFiles('**/Cartfile.resolved') }}
+        restore-keys: |
+          ${{ runner.os }}-carthage-
+    - uses: actions/cache@v2
+      id: pods-cache
+      with:
+        path: Pods
+        key: ${{ runner.os }}-pods-${{ hashFiles('**/Podfile.lock') }}
+        restore-keys: |
+          ${{ runner.os }}-pods-
+    - name: Carthage
+      if: steps.carthage-cache.outputs.cache-hit != 'true'
+      run: ./scripts/wcarthage bootstrap --platform iOS --no-use-binaries --cache-builds
+    - name: Cocoapods
+      if: steps.pods-cache.outputs.cache-hit != 'true'
+      run: bundle exec pod install
+    - name: GopenPGP
       run: |
         export PATH="/usr/local/opt/go@1.14/bin:$PATH"
-        bundle install
-        bundle exec pod install
-        ./scripts/wcarthage bootstrap --platform iOS
         ./scripts/gopenpgp_build.sh
     - name: Testing
       run: bundle exec fastlane test
diff --git a/.gitignore b/.gitignore
index ce34db5..9b58323 100644
--- a/.gitignore
+++ b/.gitignore
@@ -45,7 +45,6 @@ playground.xcworkspace
 #
 Pods/
 Podfile.lock
-*.xcworkspace/
 
 # Carthage
 #
diff --git a/.swift-version b/.swift-version
index d346e2a..c7cb131 100644
--- a/.swift-version
+++ b/.swift-version
@@ -1 +1 @@
-5.3
+5.3.1
diff --git a/pass.xcworkspace/contents.xcworkspacedata b/pass.xcworkspace/contents.xcworkspacedata
new file mode 100644
index 0000000..0db9a53
--- /dev/null
+++ b/pass.xcworkspace/contents.xcworkspacedata
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Workspace
+   version = "1.0">
+   <FileRef
+      location = "group:pass.xcodeproj">
+   </FileRef>
+   <FileRef
+      location = "group:Pods/Pods.xcodeproj">
+   </FileRef>
+</Workspace>
diff --git a/pass.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist b/pass.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
new file mode 100644
index 0000000..18d9810
--- /dev/null
+++ b/pass.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>