diff --git a/dyndnsd.gemspec b/dyndnsd.gemspec
index 7c5c338..d4844be 100644
--- a/dyndnsd.gemspec
+++ b/dyndnsd.gemspec
@@ -43,5 +43,5 @@ Gem::Specification.new do |s|
   s.add_development_dependency 'rubocop', '~> 1.16.0'
   s.add_development_dependency 'rubocop-rake', '~> 0.5.1'
   s.add_development_dependency 'rubocop-rspec', '~> 2.4.0'
-  s.add_development_dependency 'solargraph', '~> 0.41.1'
+  s.add_development_dependency 'solargraph', '~> 0.42.1'
 end