diff --git a/openvpn-status-web.gemspec b/openvpn-status-web.gemspec
index 1b16bb8..fb645a0 100644
--- a/openvpn-status-web.gemspec
+++ b/openvpn-status-web.gemspec
@@ -37,5 +37,5 @@ Gem::Specification.new do |s|
   s.add_development_dependency 'rake'
   s.add_development_dependency 'rspec'
   s.add_development_dependency 'rubocop', '~> 0.89.0'
-  s.add_development_dependency 'solargraph'
+  s.add_development_dependency 'solargraph', '< 0.39.13'
 end