diff --git a/Gemfile.lock b/Gemfile.lock
index 5f95e14..37de215 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -337,8 +337,8 @@ GEM
       ostruct
     stringio (3.2.0)
     thor (1.5.0)
-    thruster (0.1.19)
-    thruster (0.1.19-x86_64-linux)
+    thruster (0.1.21)
+    thruster (0.1.21-x86_64-linux)
     timeout (0.6.1)
     tsort (0.2.0)
     tzinfo (2.0.6)