diff --git a/lib/deps.json b/lib/deps.json
index 5a9124c..071d95f 100644
--- a/lib/deps.json
+++ b/lib/deps.json
@@ -29,6 +29,7 @@
       "junit",
       "easymock",
       "hamcrest-all",
+      "hamcrest-optional",
       "guava-testlib",
       "//utils/junit:onlab-junit"
     ],
@@ -268,6 +269,7 @@
     "google-errorprone-2.0.19": "mvn:com.google.errorprone:error_prone_annotations:2.0.19",
     "google-instrumentation-0.3.0": "mvn:com.google.instrumentation:instrumentation-api:0.3.0",
     "bcpkix-jdk15on": "mvn:org.bouncycastle:bcpkix-jdk15on:1.58",
-    "bcprov-jdk15on": "mvn:org.bouncycastle:bcprov-jdk15on:1.58"
+    "bcprov-jdk15on": "mvn:org.bouncycastle:bcprov-jdk15on:1.58",
+    "hamcrest-optional": "mvn:com.spotify:hamcrest-optional:1.1.0"
   }
 }