diff --git a/app/services/hyrax/collection_member_service.rb b/app/services/hyrax/collection_member_service.rb
index ca82edfa36..6aba299d94 100644
--- a/app/services/hyrax/collection_member_service.rb
+++ b/app/services/hyrax/collection_member_service.rb
@@ -31,5 +31,7 @@ def list_collections
     def collection_search_builder
       @collection_search_builder ||= ParentCollectionSearchBuilder.new([:include_item_ids, :add_paging_to_solr, :add_access_controls_to_solr_params], self)
     end
+
+    def search_state_class; end
   end
 end
diff --git a/app/services/hyrax/embargo_service.rb b/app/services/hyrax/embargo_service.rb
index d36cbbfcc1..688c843391 100644
--- a/app/services/hyrax/embargo_service.rb
+++ b/app/services/hyrax/embargo_service.rb
@@ -26,6 +26,10 @@ def assets_with_deactivated_embargoes
         presenters(builder)
       end
 
+      def search_state_class
+        nil
+      end
+
       private
 
       def presenter_class
diff --git a/app/services/hyrax/lease_service.rb b/app/services/hyrax/lease_service.rb
index 8455f05e65..2f1d3f4873 100644
--- a/app/services/hyrax/lease_service.rb
+++ b/app/services/hyrax/lease_service.rb
@@ -22,6 +22,10 @@ def assets_with_deactivated_leases
         presenters(builder)
       end
 
+      def search_state_class
+        nil
+      end
+
       private
 
       def presenter_class
diff --git a/app/services/hyrax/statistics/depositors/summary.rb b/app/services/hyrax/statistics/depositors/summary.rb
index 0370b1bf8b..5585805bf1 100644
--- a/app/services/hyrax/statistics/depositors/summary.rb
+++ b/app/services/hyrax/statistics/depositors/summary.rb
@@ -33,7 +33,7 @@ def depositors
 
         private
 
-        delegate :blacklight_config, to: CatalogController
+        delegate :blacklight_config, :search_state_class, to: CatalogController
         delegate :depositor_field, to: DepositSearchBuilder
 
         # results come from Solr in an array where the first item is the user and
diff --git a/hyrax.gemspec b/hyrax.gemspec
index b7ea7d9712..f67387cdd1 100644
--- a/hyrax.gemspec
+++ b/hyrax.gemspec
@@ -35,7 +35,7 @@ SUMMARY
   spec.add_dependency 'active-fedora', '~> 13.1', '>= 13.1.2'
   spec.add_dependency 'almond-rails', '~> 0.1'
   spec.add_dependency 'awesome_nested_set', '~> 3.1'
-  spec.add_dependency 'blacklight', '< 7.25'
+  spec.add_dependency 'blacklight', '~> 7.25'
   spec.add_dependency 'blacklight-gallery', '~> 4.0'
   spec.add_dependency 'breadcrumbs_on_rails', '~> 3.0'
   spec.add_dependency 'browse-everything', '>= 0.16', '< 2.0'
diff --git a/lib/hyrax/engine.rb b/lib/hyrax/engine.rb
index c049ea319f..f6469e780a 100644
--- a/lib/hyrax/engine.rb
+++ b/lib/hyrax/engine.rb
@@ -80,6 +80,10 @@ class Engine < ::Rails::Engine
         message += "It is UNEXPECTED if you are booting up a Hyrax powered application via `rails server'"
         Rails.logger.info(message)
       end
+
+      # Force CatalogController to use our SearchState class, which has an important
+      # work-around for some highly suspect SPARQL-gem monkeypatching.
+      CatalogController.search_state_class = Hyrax::SearchState if CatalogController.search_state_class == Blacklight::SearchState
     end
 
     initializer 'requires' do
diff --git a/lib/hyrax/search_state.rb b/lib/hyrax/search_state.rb
index 9fc876ad0a..396eba6928 100644
--- a/lib/hyrax/search_state.rb
+++ b/lib/hyrax/search_state.rb
@@ -9,5 +9,14 @@ def url_for_document(doc, _options = {})
       return [hyrax, doc] if doc.collection?
       [main_app, doc]
     end
+
+    # The SPARQL gem stomps on the Rails definition of deep_dup and gives us a Hash instead of
+    # a HashWithIndifferentAccess. This is an ugly workaround to get the right contract with
+    # the upstream class.
+    # https://github.com/ruby-rdf/sparql/blob/develop/lib/sparql/algebra/extensions.rb#L238-L244
+    def to_hash
+      super.with_indifferent_access
+    end
+    alias to_h to_hash
   end
 end
diff --git a/spec/helpers/hyrax/collections_helper_spec.rb b/spec/helpers/hyrax/collections_helper_spec.rb
index 0614eee171..7050bdbe76 100644
--- a/spec/helpers/hyrax/collections_helper_spec.rb
+++ b/spec/helpers/hyrax/collections_helper_spec.rb
@@ -20,6 +20,7 @@
       allow(controller).to receive(:blacklight_config).and_return(bl_config)
       allow(controller).to receive(:repository).and_return(repository)
       allow(controller).to receive(:current_ability).and_return(ability)
+      allow(controller).to receive(:search_state_class).and_return(nil)
     end
 
     it 'gives an empty set for a missing collection' do
diff --git a/spec/models/collection_spec.rb b/spec/models/collection_spec.rb
index 655ff8d71a..26be120ab6 100644
--- a/spec/models/collection_spec.rb
+++ b/spec/models/collection_spec.rb
@@ -307,7 +307,7 @@ class Member < ActiveFedora::Base
       let(:blacklight_config) { CatalogController.blacklight_config }
       let(:repository) { Blacklight::Solr::Repository.new(blacklight_config) }
       let(:current_ability) { instance_double(Ability, admin?: true) }
-      let(:scope) { double('Scope', can?: true, current_ability: current_ability, repository: repository, blacklight_config: blacklight_config) }
+      let(:scope) { double('Scope', can?: true, current_ability: current_ability, repository: repository, blacklight_config: blacklight_config, search_state_class: nil) }
 
       context 'when building a collection' do
         let(:coll123) do
diff --git a/spec/search_builders/hyrax/admin_set_search_builder_spec.rb b/spec/search_builders/hyrax/admin_set_search_builder_spec.rb
index 0b5ddd6723..1b4ba54cf6 100644
--- a/spec/search_builders/hyrax/admin_set_search_builder_spec.rb
+++ b/spec/search_builders/hyrax/admin_set_search_builder_spec.rb
@@ -2,7 +2,8 @@
 RSpec.describe Hyrax::AdminSetSearchBuilder do
   let(:context) do
     double(blacklight_config: CatalogController.blacklight_config,
-           current_ability: ability)
+           current_ability: ability,
+           search_state_class: nil)
   end
   let(:ability) do
     ::Ability.new(user)
diff --git a/spec/search_builders/hyrax/collection_member_search_builder_spec.rb b/spec/search_builders/hyrax/collection_member_search_builder_spec.rb
index 1f6acfa8bd..2be97be2c0 100644
--- a/spec/search_builders/hyrax/collection_member_search_builder_spec.rb
+++ b/spec/search_builders/hyrax/collection_member_search_builder_spec.rb
@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 RSpec.describe Hyrax::CollectionMemberSearchBuilder do
   subject(:builder) { described_class.new(scope: context, collection: collection, search_includes_models: include_models) }
-  let(:context) { double("context", blacklight_config: CatalogController.blacklight_config) }
+  let(:context) { double("context", blacklight_config: CatalogController.blacklight_config, search_state_class: nil) }
   let(:solr_params) { { fq: [] } }
   let(:include_models) { :both }
   let(:collection) { build(:collection_lw, id: '12345') }
diff --git a/spec/search_builders/hyrax/dashboard/collections_search_builder_spec.rb b/spec/search_builders/hyrax/dashboard/collections_search_builder_spec.rb
index 1bdaf88a49..a430010788 100644
--- a/spec/search_builders/hyrax/dashboard/collections_search_builder_spec.rb
+++ b/spec/search_builders/hyrax/dashboard/collections_search_builder_spec.rb
@@ -3,7 +3,8 @@
   let(:context) do
     double(blacklight_config: CatalogController.blacklight_config,
            current_ability: ability,
-           current_user: user)
+           current_user: user,
+           search_state_class: nil)
   end
   let(:ability) do
     ::Ability.new(user)
diff --git a/spec/search_builders/hyrax/dashboard/nested_collections_search_builder_spec.rb b/spec/search_builders/hyrax/dashboard/nested_collections_search_builder_spec.rb
index ec8881443c..7af25bbe0c 100644
--- a/spec/search_builders/hyrax/dashboard/nested_collections_search_builder_spec.rb
+++ b/spec/search_builders/hyrax/dashboard/nested_collections_search_builder_spec.rb
@@ -1,6 +1,6 @@
 # frozen_string_literal: true
 RSpec.describe Hyrax::Dashboard::NestedCollectionsSearchBuilder do
-  let(:scope) { double(current_ability: ability, blacklight_config: CatalogController.blacklight_config) }
+  let(:scope) { double(current_ability: ability, blacklight_config: CatalogController.blacklight_config, search_state_class: nil) }
   let(:access) { :read }
   let(:user) { create(:user) }
   let(:ability) { ::Ability.new(user) }
diff --git a/spec/search_builders/hyrax/dashboard/works_search_builder_spec.rb b/spec/search_builders/hyrax/dashboard/works_search_builder_spec.rb
index 4cb86820e0..654e985e0a 100644
--- a/spec/search_builders/hyrax/dashboard/works_search_builder_spec.rb
+++ b/spec/search_builders/hyrax/dashboard/works_search_builder_spec.rb
@@ -3,7 +3,8 @@
   let(:context) do
     double(blacklight_config: CatalogController.blacklight_config,
            current_ability: ability,
-           current_user: user)
+           current_user: user,
+           search_state_class: nil)
   end
   let(:ability) do
     ::Ability.new(user)
diff --git a/spec/search_builders/hyrax/my/collections_search_builder_spec.rb b/spec/search_builders/hyrax/my/collections_search_builder_spec.rb
index 04ac5334f9..796dc97683 100644
--- a/spec/search_builders/hyrax/my/collections_search_builder_spec.rb
+++ b/spec/search_builders/hyrax/my/collections_search_builder_spec.rb
@@ -3,7 +3,8 @@
   let(:context) do
     double(blacklight_config: CatalogController.blacklight_config,
            current_ability: ability,
-           current_user: user)
+           current_user: user,
+           search_state_class: nil)
   end
   let(:ability) do
     ::Ability.new(user)
diff --git a/spec/search_builders/hyrax/parent_collection_search_builder_spec.rb b/spec/search_builders/hyrax/parent_collection_search_builder_spec.rb
index 8686acfb50..3f9b828dcf 100644
--- a/spec/search_builders/hyrax/parent_collection_search_builder_spec.rb
+++ b/spec/search_builders/hyrax/parent_collection_search_builder_spec.rb
@@ -3,7 +3,7 @@
   let(:solr_params) { { fq: [] } }
   let(:item) { double(id: '12345', member_of_collection_ids: ['col1']) }
   let(:builder) { described_class.new(solr_params, context) }
-  let(:context) { double("context", blacklight_config: CatalogController.blacklight_config, item: item) }
+  let(:context) { double("context", blacklight_config: CatalogController.blacklight_config, item: item, search_state_class: nil) }
 
   describe '#include_item_ids' do
     let(:subject) { builder.include_item_ids(solr_params) }
diff --git a/spec/search_builders/hyrax/single_admin_set_search_builder_spec.rb b/spec/search_builders/hyrax/single_admin_set_search_builder_spec.rb
index baa698c2c5..a4fcabae30 100644
--- a/spec/search_builders/hyrax/single_admin_set_search_builder_spec.rb
+++ b/spec/search_builders/hyrax/single_admin_set_search_builder_spec.rb
@@ -3,7 +3,8 @@
   let(:ability) { instance_double(Ability, admin?: true) }
   let(:context) do
     double(blacklight_config: CatalogController.blacklight_config,
-           current_ability: ability)
+           current_ability: ability,
+           search_state_class: nil)
   end
   let(:builder) { described_class.new(context) }
 
diff --git a/spec/search_builders/hyrax/stats/work_status_search_builder_spec.rb b/spec/search_builders/hyrax/stats/work_status_search_builder_spec.rb
index ee21302bbb..33f77b9d0d 100644
--- a/spec/search_builders/hyrax/stats/work_status_search_builder_spec.rb
+++ b/spec/search_builders/hyrax/stats/work_status_search_builder_spec.rb
@@ -4,7 +4,8 @@
 
   let(:context) do
     double(blacklight_config: CatalogController.blacklight_config,
-           current_ability: ability)
+           current_ability: ability,
+           search_state_class: nil)
   end
 
   let(:ability) do
diff --git a/spec/services/hyrax/admin_set_service_spec.rb b/spec/services/hyrax/admin_set_service_spec.rb
index 530f5d4106..a4451f3526 100644
--- a/spec/services/hyrax/admin_set_service_spec.rb
+++ b/spec/services/hyrax/admin_set_service_spec.rb
@@ -4,7 +4,8 @@
   let(:context) do
     double(current_ability: Ability.new(user),
            repository: controller.repository,
-           blacklight_config: controller.blacklight_config)
+           blacklight_config: controller.blacklight_config,
+           search_state_class: nil)
   end
   let(:service) { described_class.new(context) }
   let(:user) { create(:user) }
diff --git a/spec/services/hyrax/collections/nested_collection_query_service_spec.rb b/spec/services/hyrax/collections/nested_collection_query_service_spec.rb
index 6941dcc676..231cbc0120 100644
--- a/spec/services/hyrax/collections/nested_collection_query_service_spec.rb
+++ b/spec/services/hyrax/collections/nested_collection_query_service_spec.rb
@@ -5,7 +5,7 @@
   let(:user) { create(:user) }
   let(:ability) { ::Ability.new(user) }
   let(:current_ability) { ability }
-  let(:scope) { double('Scope', can?: true, current_ability: current_ability, repository: repository, blacklight_config: blacklight_config) }
+  let(:scope) { double('Scope', can?: true, current_ability: current_ability, repository: repository, blacklight_config: blacklight_config, search_state_class: nil) }
 
   let(:collection_type) { create(:collection_type) }
   let(:another_collection_type) { create(:collection_type) }
diff --git a/spec/support/fakes/fake_search_builder_scope.rb b/spec/support/fakes/fake_search_builder_scope.rb
index 787784f2e2..a0fee84d68 100644
--- a/spec/support/fakes/fake_search_builder_scope.rb
+++ b/spec/support/fakes/fake_search_builder_scope.rb
@@ -10,6 +10,7 @@
 #   - +#current_user+
 #   - +#params+
 #   - +#repository+
+#   - +#search_state_class+
 #
 # This provides a fake scope with more control than a generic RSpec double.
 class FakeSearchBuilderScope
@@ -24,17 +25,20 @@ class FakeSearchBuilderScope
   #   @return [Hash]
   # @!attribute [r] repository
   #   @return [Blacklight::AbstractRepository]
-  attr_reader :blacklight_config, :current_ability, :current_user, :params, :repository
+  # @!attribute [r] search_state_class
+  #   @return [Blacklight::SearchState, nil]
+  attr_reader :blacklight_config, :current_ability, :current_user, :params, :repository, :search_state_class
 
   ##
   # @param [Blacklight::Configuration] blacklight_config
   # @param [::Ability, nil] current_ability
   # @param [::User, nil] current_user
-  def initialize(blacklight_config: CatalogController.blacklight_config, current_ability: nil, current_user: nil, params: {})
+  def initialize(blacklight_config: CatalogController.blacklight_config, current_ability: nil, current_user: nil, params: {}, search_state_class: nil)
     @blacklight_config = blacklight_config
     @current_user = current_user
     @current_ability = current_ability || ::Ability.new(current_user)
     @params = params
     @repository = Blacklight::Solr::Repository.new(blacklight_config)
+    @search_state_class = search_state_class
   end
 end