Avoid `pg` 1.1.0 for now

Because there are tests that fail due to the influence of the
`async_exec` deprecate message.
https://travis-ci.org/rails/rails/jobs/420345370

Related to #33188.

1 files changed, 1 insertions, 1 deletions

diff --git a/Gemfile b/Gemfile
index 86ff624e16..09f89804d9 100644
--- a/Gemfile
+++ b/Gemfile
@@ -123,7 +123,7 @@ platforms :ruby, :mswin, :mswin64, :mingw, :x64_mingw do
   gem "sqlite3", "~> 1.3.6"
 
   group :db do
-    gem "pg", ">= 0.18.0"
+    gem "pg", ">= 0.18.0", "< 1.1"
     gem "mysql2", ">= 0.4.10"
   end
 end