diff --git a/featurehub-sdk/Gemfile.lock b/featurehub-sdk/Gemfile.lock
index 081b706..b0e0f81 100644
--- a/featurehub-sdk/Gemfile.lock
+++ b/featurehub-sdk/Gemfile.lock
@@ -49,7 +49,8 @@ GEM
     rainbow (3.1.1)
     rake (13.0.6)
     regexp_parser (2.5.0)
-    rexml (3.2.5)
+    rexml (3.2.8)
+      strscan (>= 3.0.9)
     rspec (3.11.0)
       rspec-core (~> 3.11.0)
       rspec-expectations (~> 3.11.0)
@@ -83,6 +84,7 @@ GEM
       simplecov_json_formatter (~> 0.1)
     simplecov-html (0.12.3)
     simplecov_json_formatter (0.1.4)
+    strscan (3.1.0)
     unf (0.1.4)
       unf_ext
     unf_ext (0.0.8.2)