diff --git a/Gemfile.lock b/Gemfile.lock
index ded76e3..4d6a447 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -46,7 +46,8 @@ GEM
     regexp_parser (2.7.0)
     reline (0.3.2)
       io-console (~> 0.5)
-    rexml (3.2.5)
+    rexml (3.2.8)
+      strscan (>= 3.0.9)
     rubocop (1.45.1)
       json (~> 2.3)
       parallel (~> 1.10)
@@ -68,6 +69,7 @@ GEM
       simplecov_json_formatter (~> 0.1)
     simplecov-html (0.12.3)
     simplecov_json_formatter (0.1.4)
+    strscan (3.1.0)
     tpm-key_attestation (0.12.0)
       bindata (~> 2.4)
       openssl (> 2.0)