diff --git a/WORKSPACE b/WORKSPACE
index aa5825f..8269050 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -229,18 +229,18 @@
     sha1 = "8095d0b9f7e0a9cd79a663c740e0f8fb31d0e2c8",
 )
 
-GUICE_VERSION = "4.2.1"
+GUICE_VERSION = "4.2.3"
 
 maven_jar(
     name = "guice-library",
     artifact = "com.google.inject:guice:" + GUICE_VERSION,
-    sha1 = "f77dfd89318fe3ff293bafceaa75fbf66e4e4b10",
+    sha1 = "2ea992d6d7bdcac7a43111a95d182a4c42eb5ff7",
 )
 
 maven_jar(
     name = "guice-assistedinject",
     artifact = "com.google.inject.extensions:guice-assistedinject:" + GUICE_VERSION,
-    sha1 = "d327e4aee7c96f08cd657c17da231a1f4a8999ac",
+    sha1 = "acbfddc556ee9496293ed1df250cc378f331d854",
 )
 
 maven_jar(