diff --git a/.rubocop.yml b/.rubocop.yml
index b6259b4..2564b28 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -190,6 +190,10 @@ Layout/EmptyLineBetweenDefs:
 Style/NumericPredicate:
   EnforcedStyle: comparison
 
+Style/AccessModifierDeclarations:
+  Exclude:
+    - "lib/diaspora_federation/test/factories.rb"
+
 # disable this for now, needs to be rechecked later
 Style/DateTime:
   Exclude:
@@ -201,6 +205,8 @@ Style/DateTime:
 # only with ruby >= 2.3
 Layout/IndentHeredoc:
   Enabled: false
+Layout/ClosingHeredocIndentation:
+  Enabled: false
 
 # for rails 4 and ruby < 2.2.2
 Rails/HttpPositionalArguments:
diff --git a/Gemfile b/Gemfile
index f381092..01fa4bd 100644
--- a/Gemfile
+++ b/Gemfile
@@ -19,7 +19,7 @@ group :development do
   # code style
   gem "pronto",         "0.9.5",  require: false
   gem "pronto-rubocop", "0.9.0",  require: false
-  gem "rubocop",        "0.54.0", require: false
+  gem "rubocop",        "0.57.2", require: false
 
   # automatic test runs
   gem "guard-rspec",   require: false
diff --git a/Gemfile.lock b/Gemfile.lock
index 8cf11ce..f073b9b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -87,6 +87,7 @@ GEM
       multi_xml (>= 0.5.2)
     i18n (1.0.1)
       concurrent-ruby (~> 1.0)
+    jaro_winkler (1.5.1)
     json (2.1.0)
     json-schema (2.8.0)
       addressable (>= 2.4)
@@ -119,9 +120,9 @@ GEM
     octokit (4.8.0)
       sawyer (~> 0.8.0, >= 0.5.3)
     parallel (1.12.1)
-    parser (2.5.0.5)
+    parser (2.5.1.0)
       ast (~> 2.4.0)
-    powerpack (0.1.1)
+    powerpack (0.1.2)
     pronto (0.9.5)
       gitlab (~> 4.0, >= 4.0.0)
       httparty (>= 0.13.7)
@@ -183,7 +184,8 @@ GEM
       rspec-mocks (~> 3.7.0)
       rspec-support (~> 3.7.0)
     rspec-support (3.7.1)
-    rubocop (0.54.0)
+    rubocop (0.57.2)
+      jaro_winkler (~> 1.5.1)
       parallel (~> 1.10)
       parser (>= 2.5)
       powerpack (~> 0.1)
@@ -221,7 +223,7 @@ GEM
       ethon (>= 0.9.0)
     tzinfo (1.2.5)
       thread_safe (~> 0.1)
-    unicode-display_width (1.3.0)
+    unicode-display_width (1.4.0)
     uuid (2.3.8)
       macaddr (~> 1.0)
     valid (1.2.0)
@@ -253,7 +255,7 @@ DEPENDENCIES
   rspec-collection_matchers (~> 1.1.2)
   rspec-json_expectations (~> 2.1)
   rspec-rails (~> 3.7.0)
-  rubocop (= 0.54.0)
+  rubocop (= 0.57.2)
   simplecov (= 0.16.1)
   simplecov-rcov (= 0.2.3)
   spring
diff --git a/lib/diaspora_federation/discovery/host_meta.rb b/lib/diaspora_federation/discovery/host_meta.rb
index 076306f..b7a8b95 100644
--- a/lib/diaspora_federation/discovery/host_meta.rb
+++ b/lib/diaspora_federation/discovery/host_meta.rb
@@ -1,4 +1,3 @@
-
 module DiasporaFederation
   module Discovery
     # Generates and parses Host Meta documents.