diff --git a/Gemfile b/Gemfile
index 20fd57f4..e4654ea9 100644
--- a/Gemfile
+++ b/Gemfile
@@ -11,7 +11,7 @@ group :test, :development do
 
   unless ENV["NO_ACTIVERECORD"]
     gem "activerecord", ">= 3.2.3", "< 5.2.0"
-    gem "activerecord-oracle_enhanced-adapter", ">= 1.4.1", "< 1.9.0"
+    gem "activerecord-oracle_enhanced-adapter", ">= 1.4.1", "<= 7.0.3"
     gem "simplecov", ">= 0"
   end