diff --git a/.travis.yml b/.travis.yml
index 24370ba..35aca92 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,24 +6,24 @@ matrix:
     - gemfile: graphql-1.7.gemfile
       env: GRAPHQL_RUBY_VERSION=1_7 CI=true
       rvm: 2.3.8
-    - gemfile: graphql-1.8.gemfile
-      env: GRAPHQL_RUBY_VERSION=1_8 CI=true
+    - gemfile: graphql-latest.gemfile
+      env: GRAPHQL_RUBY_VERSION=LATEST CI=true
       rvm: 2.3.8
     - gemfile: graphql-1.7.gemfile
       env: GRAPHQL_RUBY_VERSION=1_7 CI=true
       rvm: 2.4.5
-    - gemfile: graphql-1.8.gemfile
-      env: GRAPHQL_RUBY_VERSION=1_8 CI=true
+    - gemfile: graphql-latest.gemfile
+      env: GRAPHQL_RUBY_VERSION=LATEST CI=true
       rvm: 2.4.5
     - gemfile: graphql-1.7.gemfile
       env: GRAPHQL_RUBY_VERSION=1_7 CI=true
       rvm: 2.5.7
-    - gemfile: graphql-1.8.gemfile
-      env: GRAPHQL_RUBY_VERSION=1_8 CI=true
+    - gemfile: graphql-latest.gemfile
+      env: GRAPHQL_RUBY_VERSION=LATEST CI=true
       rvm: 2.5.7
     - gemfile: graphql-1.7.gemfile
       env: GRAPHQL_RUBY_VERSION=1_7 CI=true
       rvm: 2.6.5
-    - gemfile: graphql-1.8.gemfile
-      env: GRAPHQL_RUBY_VERSION=1_8 CI=true
+    - gemfile: graphql-latest.gemfile
+      env: GRAPHQL_RUBY_VERSION=LATEST CI=true
       rvm: 2.6.5
diff --git a/Gemfile b/Gemfile
index 41fc69b..ade3400 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,7 +2,7 @@ source "https://rubygems.org"
 
 gem "pry"
 
-gem "graphql", "~> 1.8.4"
+gem "graphql", "~> 1.10"
 
 # Specify your gem's dependencies in graphql-guard.gemspec
 gemspec
diff --git a/graphql-1.8.gemfile b/graphql-latest.gemfile
similarity index 72%
rename from graphql-1.8.gemfile
rename to graphql-latest.gemfile
index b258127..67ae9ad 100644
--- a/graphql-1.8.gemfile
+++ b/graphql-latest.gemfile
@@ -3,6 +3,6 @@ source "https://rubygems.org"
 gem "pry"
 gem 'coveralls'
 
-gem "graphql", "~> 1.8.4"
+gem "graphql", "~> 1.10"
 
 gemspec
diff --git a/lib/graphql/guard.rb b/lib/graphql/guard.rb
index a03de8f..b059293 100644
--- a/lib/graphql/guard.rb
+++ b/lib/graphql/guard.rb
@@ -19,13 +19,7 @@ def initialize(policy_object: nil, not_authorized: DEFAULT_NOT_AUTHORIZED)
 
     def use(schema_definition)
       schema_definition.instrument(:field, self)
-      schema_definition.target.instance_eval do
-        def default_filter
-          GraphQL::Filter.new(except: default_mask).merge(only: ->(schema_member, ctx) {
-            schema_member.metadata[:mask] ? schema_member.metadata[:mask].call(ctx) : true
-          })
-        end
-      end
+      add_schema_masking!(schema_definition)
     end
 
     def instrument(type, field)
@@ -55,6 +49,22 @@ def guard_proc(type, field)
 
     private
 
+    def add_schema_masking!(schema_definition)
+      default_filter_proc = Proc.new do
+        def default_filter
+          GraphQL::Filter.new(except: default_mask).merge(only: ->(schema_member, ctx) {
+            schema_member.metadata[:mask] ? schema_member.metadata[:mask].call(ctx) : true
+          })
+        end
+      end
+
+      if schema_definition.is_a?(Class) # GraphQL-Ruby version >= 1.10
+        schema_definition.class_eval(&default_filter_proc)
+      else
+        schema_definition.target.instance_eval(&default_filter_proc)
+      end
+    end
+
     def policy_object_guard(type, field_name)
       policy_object && policy_object.guard(type, field_name)
     end
diff --git a/spec/fixtures/inline_schema.rb b/spec/fixtures/inline_schema.rb
index b207436..5b6a6fc 100644
--- a/spec/fixtures/inline_schema.rb
+++ b/spec/fixtures/inline_schema.rb
@@ -36,7 +36,7 @@ module Inline
         GraphQL::ExecutionError.new("Not authorized to access #{type}.#{field}")
       })
     end
-  when '1_8'
+  when 'LATEST'
     class PostType < GraphQL::Schema::Object
       guard ->(_post, _args, ctx) { ctx[:current_user].admin? }
       field :id, ID, null: false
diff --git a/spec/fixtures/policy_object_schema.rb b/spec/fixtures/policy_object_schema.rb
index 69bbda4..9e2942c 100644
--- a/spec/fixtures/policy_object_schema.rb
+++ b/spec/fixtures/policy_object_schema.rb
@@ -36,7 +36,7 @@ def self.guard(type, field)
       query QueryType
       use GraphQL::Guard.new(policy_object: GraphqlPolicy)
     end
-  when '1_8'
+  when 'LATEST'
     class PostType < GraphQL::Schema::Object
       field :id, ID, null: false
       field :title, String, null: true
diff --git a/spec/graphql/guard_spec.rb b/spec/graphql/guard_spec.rb
index a6c0870..0b4dab0 100644
--- a/spec/graphql/guard_spec.rb
+++ b/spec/graphql/guard_spec.rb
@@ -67,11 +67,21 @@
 
       result = Inline::Schema.execute(query, variables: {'userId' => user.id}, context: {current_user: user})
 
-      expect(result['errors']).to include({
-        "message" => "Field 'postsWithMask' doesn't exist on type 'Query'",
-        "locations" => [{"line" => 1, "column" => 23}],
-        "fields" => ["query", "postsWithMask"]
-      })
+      case ENV['GRAPHQL_RUBY_VERSION']
+      when '1_7'
+        expect(result['errors']).to include({
+          "message" => "Field 'postsWithMask' doesn't exist on type 'Query'",
+          "locations" => [{"line" => 1, "column" => 23}],
+          "fields" => ["query", "postsWithMask"]
+        })
+      when 'LATEST'
+        expect(result['errors']).to include({
+          "message" => "Field 'postsWithMask' doesn't exist on type 'Query'",
+          "locations" => [{"line" => 1, "column" => 23}],
+          "path" => ["query", "postsWithMask"],
+          "extensions" =>  {"code" => "undefinedField", "typeName" => "Query", "fieldName" => "postsWithMask"}
+        })
+      end
     end
   end
 
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 74e7a27..129e314 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -2,7 +2,7 @@
 
 require "bundler/setup"
 
-ENV['GRAPHQL_RUBY_VERSION'] ||= '1_8'
+ENV['GRAPHQL_RUBY_VERSION'] ||= 'LATEST'
 
 if ENV['CI']
   require 'simplecov'