diff --git a/api/build.gradle b/api/build.gradle
index aa8102f..749a0da 100644
--- a/api/build.gradle
+++ b/api/build.gradle
@@ -89,6 +89,10 @@ publishing {
 }
 
 signing {
+    def signingKey = findProperty("signingKey")
+    def signingPassword = findProperty("signingPassword")
+    def signingKeyId = findProperty("signingKeyId")
+    useInMemoryPgpKeys(signingKeyId, signingKey, signingPassword)
     sign publishing.publications.mavenJava
 }