diff --git a/weaver/common/protos-java-kt/build.gradle b/weaver/common/protos-java-kt/build.gradle
index d7e20b2950..850949d9ad 100644
--- a/weaver/common/protos-java-kt/build.gradle
+++ b/weaver/common/protos-java-kt/build.gradle
@@ -76,7 +76,6 @@ dependencies {
     implementation "io.grpc:grpc-netty-shaded:$grpc_version"
     implementation "io.grpc:grpc-protobuf:$grpc_version"
     implementation "io.grpc:grpc-stub:$grpc_version"
-    implementation 'javax.annotation:javax.annotation-api:1.3.2'
     compileOnly 'org.apache.tomcat:annotations-api:6.0.53' // necessary for Java 9+
 
 }
diff --git a/weaver/core/network/corda-interop-app/build.gradle b/weaver/core/network/corda-interop-app/build.gradle
index 628edb536c..593ddfc283 100644
--- a/weaver/core/network/corda-interop-app/build.gradle
+++ b/weaver/core/network/corda-interop-app/build.gradle
@@ -117,6 +117,10 @@ allprojects {
         preserveFileTimestamps = false
         reproducibleFileOrder = true
     }
+
+    tasks.named('jar') {
+        duplicatesStrategy = DuplicatesStrategy.EXCLUDE
+    }
 }
 
 apply plugin: 'net.corda.plugins.cordapp'