diff --git a/dyndnsd.gemspec b/dyndnsd.gemspec
index f13becb..dc5cd27 100644
--- a/dyndnsd.gemspec
+++ b/dyndnsd.gemspec
@@ -43,5 +43,5 @@ Gem::Specification.new do |s|
   s.add_development_dependency 'rubocop', '~> 1.18.1'
   s.add_development_dependency 'rubocop-rake', '~> 0.6.0'
   s.add_development_dependency 'rubocop-rspec', '~> 2.4.0'
-  s.add_development_dependency 'solargraph', '~> 0.42.1'
+  s.add_development_dependency 'solargraph', '~> 0.43.0'
 end