diff --git a/build.gradle b/build.gradle
index e678c83..62a1b3c 100644
--- a/build.gradle
+++ b/build.gradle
@@ -218,6 +218,10 @@ publishing {
 }
 
 signing {
+    if (project.hasProperty("signingKey") && project.hasProperty("signingPassword")) {
+        logger.lifecycle("Signing with an in-memory key.")
+        useInMemoryPgpKeys(signingKey, signingPassword)
+    }
     sign publishing.publications.maven
 }