diff --git a/language_server.gemspec b/language_server.gemspec
index a11c3d5..0e7f97f 100644
--- a/language_server.gemspec
+++ b/language_server.gemspec
@@ -25,7 +25,7 @@ Gem::Specification.new do |spec|
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ["lib"]
 
-  spec.add_dependency "language_server-protocol", "3.7.0.0"
+  spec.add_dependency "language_server-protocol", "3.15.0.0"
 
   spec.add_development_dependency "awesome_print"
   spec.add_development_dependency "benchmark-ips"