diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 4770651..d2109d6 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -14,10 +14,10 @@ jobs:
     name: Test Release Installation
     strategy:
       matrix:
-        swift-version: [ 5.7, 5.8.1 ]
+        swift-version: [ '5.7', '5.8.1' ]
         os-version: [ 'ubuntu-22.04' ]
         include:
-          - swift-version: 5.6
+          - swift-version: '5.6'
             os-version: ubuntu-20.04
     runs-on: ${{ matrix.os-version }}
     steps:
@@ -63,10 +63,10 @@ jobs:
     name: Test Branch Installation
     strategy:
       matrix:
-        swift-version: [ 5.7, 5.8.1 ]
+        swift-version: [ '5.7', '5.8.1' ]
         os-version: [ 'ubuntu-22.04' ]
         include:
-          - swift-version: 5.6
+          - swift-version: '5.6'
             os-version: ubuntu-20.04
     runs-on: ${{ matrix.os-version }}
     steps:
@@ -114,7 +114,7 @@ jobs:
       matrix:
         os-version: [ 'ubuntu-22.04', 'ubuntu-20.04' ]
     env:
-      INPUT_SWIFT_VERSION: 5.8
+      INPUT_SWIFT_VERSION: '5.8'
     runs-on: ${{ matrix.os-version }}
     steps:
       - uses: actions/checkout@v4
diff --git a/src/main.ts b/src/main.ts
index 8284f14..66d64e1 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -52,11 +52,14 @@ async function install(installBase: string, branchName: string, versionTag: stri
     await core.group('Downloading files', async () => {
         const swiftURL = `https://download.swift.org/${branchName}/${platform.split('.').join('')}/${versionTag}/${versionTag}-${platform}.tar.gz`;
         core.debug(`Swift Download URL: ${swiftURL}...`)
-        await Promise.all([
-            tools.downloadTool(swiftURL, swiftPkg),
-            tools.downloadTool(`${swiftURL}.sig`, swiftSig),
-            tools.downloadTool('https://swift.org/keys/all-keys.asc', allKeysFile),
-        ]);
+        let promises: Promise<string>[] = [tools.downloadTool(swiftURL, swiftPkg)];
+        if (!skipGPGCheck) {
+            promises.push(
+                tools.downloadTool(`${swiftURL}.sig`, swiftSig),
+                tools.downloadTool('https://www.swift.org/keys/all-keys.asc', allKeysFile),
+            );
+        }
+        await Promise.all(promises);
     });
 
     if (!skipGPGCheck) {