diff --git a/sdks/java/io/synthetic/build.gradle b/sdks/java/io/synthetic/build.gradle
index cb9cbf8db1d7..68d916f2f69a 100644
--- a/sdks/java/io/synthetic/build.gradle
+++ b/sdks/java/io/synthetic/build.gradle
@@ -18,6 +18,7 @@
 
 plugins { id 'org.apache.beam.module' }
 applyJavaNature(
+  enableStrictDependencies: true,
   exportJavadoc: false,
   automaticModuleName: 'org.apache.beam.sdk.io.synthetic',
 )
@@ -31,11 +32,11 @@ dependencies {
   compile library.java.jackson_core
   compile library.java.jackson_annotations
   compile library.java.jackson_databind
+  compile library.java.slf4j_api
+  compile library.java.vendored_guava_26_0_jre
   compile project(path: ":sdks:java:core", configuration: "shadow")
 
   testCompile library.java.vendored_guava_26_0_jre
   testCompile library.java.junit
-  testCompile library.java.hamcrest_core
-  testCompile library.java.hamcrest_library
   testRuntimeOnly project(path: ":runners:direct-java", configuration: "shadow")
 }