diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 34d41f8..8158df6 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -63,17 +63,21 @@ jobs:
           KEYCHAIN_PASSWORD: ${{ secrets.KEYCHAIN_PASSWORD }}
         run: |
           echo $APPLE_CERTIFICATE | base64 --decode > certificate.p12
-          security create-keychain -p "$KEYCHAIN_PASSWORD" build.keychain
-          security default-keychain -s build.keychain
-          security unlock-keychain -p "$KEYCHAIN_PASSWORD" build.keychain
-          security set-keychain-settings -t 3600 -u build.keychain
+          # security create-keychain -p "$KEYCHAIN_PASSWORD" build.keychain
+          # security default-keychain -s build.keychain
+          # security unlock-keychain -p "$KEYCHAIN_PASSWORD" build.keychain
+          # security set-keychain-settings -t 3600 -u build.keychain
           
-          curl https://droposs.org/drop.crt --output drop.pem
-          sudo security authorizationdb write com.apple.trust-settings.user allow
-          security add-trusted-cert -r trustRoot -k build.keychain -p codeSign -u -1 drop.pem
-          sudo security authorizationdb remove com.apple.trust-settings.user
+          curl https://droposs.org/drop.der --output drop.der
+          swiftc libs/appletrust/add-certificate.swift
+          ./add-certificate drop.der
+          rm add-certificate
 
-          security import certificate.p12 -k build.keychain -P "$APPLE_CERTIFICATE_PASSWORD" -T /usr/bin/codesign
+          # sudo security authorizationdb write com.apple.trust-settings.user allow
+          # security add-trusted-cert -r trustRoot -k build.keychain -p codeSign -u -1 drop.pem
+          # sudo security authorizationdb remove com.apple.trust-settings.user
+
+          security import certificate.p12 -k /Library/Keychains/System.keychain -P "$APPLE_CERTIFICATE_PASSWORD" -T /usr/bin/codesign
           security set-key-partition-list -S apple-tool:,apple:,codesign: -s -k "$KEYCHAIN_PASSWORD" build.keychain
           security find-identity -v -p codesigning build.keychain
 
diff --git a/.gitlab-ci-local/.gitignore b/.gitlab-ci-local/.gitignore
deleted file mode 100644
index d6b7ef3..0000000
--- a/.gitlab-ci-local/.gitignore
+++ /dev/null
@@ -1,2 +0,0 @@
-*
-!.gitignore
diff --git a/libs/appletrust/add-certificate.swift b/libs/appletrust/add-certificate.swift
new file mode 100644
index 0000000..ecb1285
--- /dev/null
+++ b/libs/appletrust/add-certificate.swift
@@ -0,0 +1,72 @@
+import Foundation
+import Security
+
+enum SecurityError: Error {
+    case generalError
+}
+
+func deleteCertificateFromKeyChain(_ certificateLabel: String) -> Bool {
+    let delQuery: [NSString: Any] = [
+        kSecClass: kSecClassCertificate,
+        kSecAttrLabel: certificateLabel,
+    ]
+    let delStatus: OSStatus = SecItemDelete(delQuery as CFDictionary)
+
+    return delStatus == errSecSuccess
+}
+
+func saveCertificateToKeyChain(_ certificate: SecCertificate, certificateLabel: String) throws {
+    SecKeychainSetPreferenceDomain(SecPreferencesDomain.system)
+    deleteCertificateFromKeyChain(certificateLabel)
+
+    let setQuery: [NSString: AnyObject] = [
+        kSecClass: kSecClassCertificate,
+        kSecValueRef: certificate,
+        kSecAttrLabel: certificateLabel as AnyObject,
+        kSecAttrAccessible: kSecAttrAccessibleWhenUnlocked,
+    ]
+    let addStatus: OSStatus = SecItemAdd(setQuery as CFDictionary, nil)
+
+    guard addStatus == errSecSuccess else {
+        throw SecurityError.generalError
+    }
+
+    var status = SecTrustSettingsSetTrustSettings(certificate, SecTrustSettingsDomain.admin, nil)
+}
+
+func getCertificateFromString(stringData: String) throws -> SecCertificate {
+    if let data = NSData(base64Encoded: stringData, options: NSData.Base64DecodingOptions.ignoreUnknownCharacters) {
+        if let certificate = SecCertificateCreateWithData(kCFAllocatorDefault, data) {
+            return certificate
+        }
+    }
+    throw SecurityError.generalError
+}
+
+if CommandLine.arguments.count != 2 {
+    print("Usage: \(CommandLine.arguments[0]) [cert.file]")
+    print("Usage: \(CommandLine.arguments[0]) --version")
+    exit(1)
+}
+
+if (CommandLine.arguments[1] == "--version") {
+    let version = "dev"
+    print(version)
+    exit(0)
+} else {
+    let fileURL = URL(fileURLWithPath: CommandLine.arguments[1])
+    do {
+        let certData = try Data(contentsOf: fileURL)
+        let certificate = SecCertificateCreateWithData(nil, certData as CFData)
+        if certificate != nil {
+            print("Saving certificate")
+            try? saveCertificateToKeyChain(certificate!, certificateLabel: "DropOSS")
+            exit(0)
+        } else {
+            print("ERROR: Unknown error while reading the \(CommandLine.arguments[1]) file.")
+        }
+    } catch {
+        print("ERROR: Unexpected error while reading the \(CommandLine.arguments[1]) file. \(error)")
+    }
+}
+exit(1)
\ No newline at end of file