diff --git a/libertree-model-rb/Gemfile.lock b/libertree-model-rb/Gemfile.lock
index ead88ebc..a3fc9b9d 100644
--- a/libertree-model-rb/Gemfile.lock
+++ b/libertree-model-rb/Gemfile.lock
@@ -28,7 +28,7 @@ GEM
       mini_portile (~> 0.5.0)
     parkdown (1.4.25)
     pg (0.15.1)
-    rake (0.9.2.2)
+    rake (13.0.1)
     rspec (2.14.1)
       rspec-core (~> 2.14.0)
       rspec-expectations (~> 2.14.0)