diff --git a/Gemfile.lock b/Gemfile.lock
index 75b5053f..7816f3d2 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -190,9 +190,10 @@ GEM
     image_processing (1.12.2)
       mini_magick (>= 4.9.5, < 5)
       ruby-vips (>= 2.0.17, < 3)
-    ims-lti (1.2.7)
+    ims-lti (1.2.8)
       builder (>= 1.0, < 4.0)
       oauth (>= 0.4.5, < 0.6)
+      rexml
     influxdb (0.8.1)
     jbuilder (2.11.5)
       actionview (>= 5.0.0)