diff --git a/Gemfile.lock b/Gemfile.lock
index 32c6f84fcb..b7341fb79a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -350,7 +350,7 @@ GEM
     ostruct (0.6.3)
     palm_civet (1.1.0)
     parallel (1.27.0)
-    parallel_tests (5.5.0)
+    parallel_tests (5.6.0)
       parallel
     parser (3.3.10.1)
       ast (~> 2.4.1)