diff --git a/build.gradle b/build.gradle
index 040afda..09e7d61 100644
--- a/build.gradle
+++ b/build.gradle
@@ -6,7 +6,7 @@ subprojects {
 
     sourceCompatibility = 1.7
     group = 'ch.dissem.jabit'
-    version = '1.0.1-SNAPSHOT'
+    version = '1.0.1'
 
     ext.isReleaseVersion = !version.endsWith("SNAPSHOT")
 
@@ -35,7 +35,7 @@ subprojects {
     }
 
     signing {
-        required { isReleaseVersion }
+        required { isReleaseVersion && project.getProperties().get("signing.keyId")?.length() > 0 }
         sign configurations.archives
     }
 
diff --git a/demo/build.gradle b/demo/build.gradle
index 2ab6363..d87b0f3 100644
--- a/demo/build.gradle
+++ b/demo/build.gradle
@@ -16,6 +16,8 @@ uploadArchives {
 
 sourceCompatibility = 1.8
 
+test.enabled = Boolean.valueOf(systemTestsEnabled)
+
 task fatCapsule(type: FatCapsule) {
     applicationClass 'ch.dissem.bitmessage.demo.Main'
 }
diff --git a/demo/src/test/java/ch/dissem/bitmessage/SystemTest.java b/demo/src/test/java/ch/dissem/bitmessage/SystemTest.java
index fd73dcf..1309336 100644
--- a/demo/src/test/java/ch/dissem/bitmessage/SystemTest.java
+++ b/demo/src/test/java/ch/dissem/bitmessage/SystemTest.java
@@ -6,7 +6,6 @@ import ch.dissem.bitmessage.entity.Plaintext;
 import ch.dissem.bitmessage.networking.DefaultNetworkHandler;
 import ch.dissem.bitmessage.repository.*;
 import ch.dissem.bitmessage.utils.TTL;
-import ch.dissem.bitmessage.utils.UnixTime;
 import org.junit.AfterClass;
 import org.junit.BeforeClass;
 import org.junit.Test;
@@ -78,7 +77,7 @@ public class SystemTest {
         String originalMessage = UUID.randomUUID().toString();
         alice.send(aliceIdentity, new BitmessageAddress(bobIdentity.getAddress()), "Subject", originalMessage);
 
-        Plaintext plaintext = bobListener.get(5, TimeUnit.MINUTES);
+        Plaintext plaintext = bobListener.get(15, TimeUnit.MINUTES);
 
         assertThat(plaintext.getText(), equalTo(originalMessage));
     }
diff --git a/gradle.properties b/gradle.properties
index eb6ed30..bb8beb4 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -8,3 +8,4 @@ signing.password=
 ossrhUsername=
 ossrhPassword=
 
+systemTestsEnabled=false
\ No newline at end of file