diff --git a/pgcat/tests/ruby/Gemfile.lock b/pgcat/tests/ruby/Gemfile.lock
index 048683b..1a883ac 100644
--- a/pgcat/tests/ruby/Gemfile.lock
+++ b/pgcat/tests/ruby/Gemfile.lock
@@ -24,8 +24,8 @@ GEM
     pg (1.3.2)
     rainbow (3.1.1)
     regexp_parser (2.3.1)
-    rexml (3.2.8)
-      strscan (>= 3.0.9)
+    rexml (3.3.6)
+      strscan
     rspec (3.11.0)
       rspec-core (~> 3.11.0)
       rspec-expectations (~> 3.11.0)