Appraisals in fx-0.4.0 vs Appraisals in fx-0.5.0

@@ -1,23 +1,24 @@
-appraise "rails40" do
-  gem "activerecord", "~> 4.0.0"
-  gem "railties", "~> 4.0.0"
-end
-
-appraise "rails41" do
-  gem "activerecord", "~> 4.1.0"
-  gem "railties", "~> 4.1.0"
-end
-
 appraise "rails42" do
   gem "activerecord", "~> 4.2.0"
   gem "railties", "~> 4.2.0"
+  gem "pg", "~> 0.15"
 end
 
 if RUBY_VERSION > "2.2.0"
   appraise "rails50" do
     gem "activerecord", "~> 5.0"
     gem "railties", "~> 5.0"
+  end
+
+  appraise "rails51" do
+    gem "activerecord", "~> 5.1"
+    gem "railties", "~> 5.1"
+  end
+
+  appraise "rails52" do
+    gem "activerecord", "~> 5.2"
+    gem "railties", "~> 5.2"
   end
 
   appraise "rails-edge" do
     gem "rails", github: "rails/rails"
     gem "arel", :github => "rails/arel"