diff --git a/api/build.gradle.kts b/api/build.gradle.kts
index 26f02c5..badd474 100644
--- a/api/build.gradle.kts
+++ b/api/build.gradle.kts
@@ -84,10 +84,10 @@ publishing {
 signing {
     val signingKey = findProperty("signingKey") as String?
     val signingPassword = findProperty("signingPassword") as String?
-    if (signingKey != null && signingPassword != null) {
+    if (!signingKey.isNullOrBlank() && !signingPassword.isNullOrBlank()) {
         useInMemoryPgpKeys(signingKey, signingPassword)
+        sign(publishing.publications)
     }
-    sign(publishing.publications)
 }