diff --git a/misc/requirements/requirements-pylint.txt b/misc/requirements/requirements-pylint.txt
index 777d47fdd..7463184a4 100644
--- a/misc/requirements/requirements-pylint.txt
+++ b/misc/requirements/requirements-pylint.txt
@@ -4,7 +4,6 @@ astroid==1.5.3
 certifi==2017.7.27.1
 chardet==3.0.4
 github3.py==0.9.6
-idna==2.6
 isort==4.2.15
 lazy-object-proxy==1.3.1
 mccabe==0.6.1
diff --git a/qutebrowser/browser/webengine/webenginesettings.py b/qutebrowser/browser/webengine/webenginesettings.py
index 8130ecbde..1ee017660 100644
--- a/qutebrowser/browser/webengine/webenginesettings.py
+++ b/qutebrowser/browser/webengine/webenginesettings.py
@@ -133,7 +133,8 @@ class DictionaryLanguageSetter(DefaultProfileSetter):
     """Sets paths to dictionary files based on language codes."""
 
     def __init__(self):
-        super().__init__('setSpellCheckLanguages')
+        super().__init__('setSpellCheckLanguages', default=[],
+                         min_version='5.8')
 
     def _set(self, value, settings=None):
         if settings is not None: