diff --git a/build.gradle b/build.gradle
index 78f563ca6..9dafb0bd3 100644
--- a/build.gradle
+++ b/build.gradle
@@ -85,6 +85,11 @@ def RELEASE_MODULES = ["services",
                        "services-turf"]
 
 subprojects { subproject ->
+
+  tasks.withType(Jar) {
+    exclude "**/*.java"
+  }
+
   if (TESTABLE_MODULES.contains(subproject.name)) {
     subproject.apply plugin: "com.vanniktech.android.junit.jacoco"
     subproject.apply from: "${rootDir}/gradle/jacoco.gradle"