Pin pry-stack_explorer for tests15_blocklist

Signed-off-by: Tim Smith <tsmith@chef.io>

1 files changed, 1 insertions, 1 deletions

diff --git a/Gemfile b/Gemfile
index fb8cc079..a7508f2f 100644
--- a/Gemfile
+++ b/Gemfile
@@ -25,6 +25,6 @@ end
 group :debug do
   gem "pry"
   gem "pry-byebug"
-  gem "pry-stack_explorer"
+  gem "pry-stack_explorer", "~> 0.4.0" # pin until we drop ruby < 2.6
   gem "rb-readline"
 end