diff --git a/lib/activerecord-postgis-adapter.rb b/lib/activerecord-postgis-adapter.rb
index 8e6d27b4..cefe7a4f 100644
--- a/lib/activerecord-postgis-adapter.rb
+++ b/lib/activerecord-postgis-adapter.rb
@@ -1,3 +1,9 @@
 # frozen_string_literal: true
 
-require "active_record/connection_adapters/postgis_adapter"
+require "active_record"
+require "active_record/connection_adapters"
+require "rgeo/active_record"
+
+ActiveSupport.on_load(:active_record_postgresqladapter) do
+  require "active_record/connection_adapters/postgis_adapter"
+end