diff --git a/java/google/registry/proxy/BUILD b/java/google/registry/proxy/BUILD
index 15d248d09..79719ae3e 100644
--- a/java/google/registry/proxy/BUILD
+++ b/java/google/registry/proxy/BUILD
@@ -32,6 +32,7 @@ java_library(
         "@com_google_code_findbugs_jsr305",
         "@com_google_dagger",
         "@com_google_flogger",
+        "@com_google_flogger_system_backend",
         "@com_google_guava",
         "@com_google_monitoring_client_metrics",
         "@com_google_monitoring_client_stackdriver",