Use HTTPS for connecting to maven.
diff --git a/build.gradle b/build.gradle
index d691e44..a9f422d 100644
--- a/build.gradle
+++ b/build.gradle
@@ -15,6 +15,6 @@
 		}
 		jcenter()
 		google()
-		maven { url 'http://maven.ghostscript.com/' }
+		maven { url 'https://maven.ghostscript.com/' }
 	}
 }