diff --git a/pgcat/tests/ruby/Gemfile.lock b/pgcat/tests/ruby/Gemfile.lock
index f4060a5..9100aa7 100644
--- a/pgcat/tests/ruby/Gemfile.lock
+++ b/pgcat/tests/ruby/Gemfile.lock
@@ -25,8 +25,7 @@ GEM
     pg (1.3.2)
     rainbow (3.1.1)
     regexp_parser (2.3.1)
-    rexml (3.3.6)
-      strscan
+    rexml (3.3.9)
     rspec (3.11.0)
       rspec-core (~> 3.11.0)
       rspec-expectations (~> 3.11.0)
@@ -52,7 +51,6 @@ GEM
     rubocop-ast (1.17.0)
       parser (>= 3.1.1.0)
     ruby-progressbar (1.11.0)
-    strscan (3.1.0)
     toml (0.3.0)
       parslet (>= 1.8.0, < 3.0.0)
     toxiproxy (2.0.1)