diff --git a/Gemfile b/Gemfile
index 2a30020..c5d195b 100644
--- a/Gemfile
+++ b/Gemfile
@@ -12,7 +12,7 @@ else
   gem 'activerecord', ENV['AR']
 end
 
-git 'https://github.com/activerecord-hackery/ransack', branch: 'master' do
+git 'https://github.com/gregmolnar/ransack', branch: 'fix-polymorphic-joins' do
   gem 'polyamorous'
 end
 
diff --git a/spec/integration/__snapshots__/where_chain_spec.yaml b/spec/integration/__snapshots__/where_chain_spec.yaml
index fe6ff39..3bb8f6e 100644
--- a/spec/integration/__snapshots__/where_chain_spec.yaml
+++ b/spec/integration/__snapshots__/where_chain_spec.yaml
@@ -94,3 +94,6 @@
   FROM "posts" WHERE "posts"."author_id" = 42
 "#where.has wheres an association using #!= 1 (Active Record: v5.2)": SELECT "posts".*
   FROM "posts" WHERE "posts"."author_id" != 42
+"#where.has wheres on polymorphic associations 1 (Active Record: v5.2)": SELECT "pictures".*
+  FROM "pictures" INNER JOIN "posts" ON "posts"."id" = "pictures"."imageable_id" AND
+  "pictures"."imageable_type" = 'Post' WHERE "posts"."title" LIKE 'meatloaf'
diff --git a/spec/integration/joining_spec.rb b/spec/integration/joining_spec.rb
index 3a2fd24..a53c2e4 100644
--- a/spec/integration/joining_spec.rb
+++ b/spec/integration/joining_spec.rb
@@ -122,20 +122,12 @@
 
     describe 'polymorphism' do
       it 'inner joins' do
-        if ActiveRecord::VERSION::STRING >= '5.2.0'
-          pending "polyamorous's support for polymorphism is broken"
-        end
-
         relation = Picture.joining { imageable.of(Post) }
 
         expect(relation).to match_sql_snapshot
       end
 
       it 'outer joins' do
-        if ActiveRecord::VERSION::STRING >= '5.2.0'
-          pending "polyamorous's support for polymorphism is broken"
-        end
-
         relation = Picture.joining { imageable.of(Post).outer }
 
         expect(relation).to match_sql_snapshot
@@ -164,10 +156,6 @@
       end
 
       it 'handles polymorphism' do
-        if ActiveRecord::VERSION::STRING >= '5.2.0'
-          pending "polyamorous's support for polymorphism is broken"
-        end
-
         relation = Picture.joining { imageable.of(Post).comments }
 
         expect(relation).to match_sql_snapshot
diff --git a/spec/integration/where_chain_spec.rb b/spec/integration/where_chain_spec.rb
index 3ba8344..679351f 100644
--- a/spec/integration/where_chain_spec.rb
+++ b/spec/integration/where_chain_spec.rb
@@ -70,15 +70,11 @@
   end
 
   it 'wheres on polymorphic associations' do
-    if ActiveRecord::VERSION::STRING >= '5.2.0'
-      pending "polyamorous's support for polymorphism is broken"
-    end
-
     relation = Picture.joining { imageable.of(Post) }.where.has {
       imageable.of(Post).title =~ 'meatloaf'
     }
 
-    expect(relation).to match_sql_snapshot
+    expect(relation).to match_sql_snapshot(variants: ['5.2'])
   end
 
   it 'wheres on polymorphic associations outer join' do