diff --git a/external-config/build.gradle b/external-config/build.gradle
index 47a60d4..a455e6f 100644
--- a/external-config/build.gradle
+++ b/external-config/build.gradle
@@ -68,15 +68,25 @@ publishing {
     }
 }
 
-ext."signing.keyId" = project.findProperty('signing.keyId') ?: System.getenv('SIGNING_KEY')
-ext."signing.password" = project.findProperty('signing.password') ?: System.getenv('SIGNING_PASSPHRASE')
-ext."signing.secretKeyRingFile" = project.findProperty('signing.secretKeyRingFile') ?: (System.getenv('GITHUB_WORKSPACE') ? "${System.getenv('GITHUB_WORKSPACE')}/secring.gpg" : "${System.getProperty('user.home')}/.gnupg/secring.gpg")
-
-ext.isReleaseVersion = !version.endsWith('SNAPSHOT')
-
 afterEvaluate {
     signing {
-        required { isReleaseVersion }
+        if (System.getenv('SIGN_ARMORED_KEY')) {
+            String signingKey = System.getenv('SIGN_ARMORED_KEY')
+            String signingPassword = System.getenv('SIGN_PASSWORD')
+            useInMemoryPgpKeys(signingKey, signingPassword)
+        } else {
+            ext["signing.keyId"] = System.getenv('SIGNING_KEY_ID')
+            ext["signing.password"] = System.getenv('SIGNING_PASSPHRASE')
+            ext["signing.secretKeyRingFile"] = System.getenv('SECRING_FILE')
+        }
+        required {
+            isReleaseVersion
+        }
+
         sign publishing.publications.maven
     }
 }
+
+tasks.withType(Sign).configureEach {
+    onlyIf { isReleaseVersion }
+}