diff --git a/Gemfile b/Gemfile
index 67bdb2f..4058a02 100644
--- a/Gemfile
+++ b/Gemfile
@@ -7,6 +7,6 @@ group :development, :test do
   gem "activejob", "~> 8.0"
   gem "rake", "~> 13.0"
   gem "rack", "~> 3.0"
-  gem "semantic_logger", "~> 4.15"
+  gem "semantic_logger", "~> 5.1"
   gem "webrick", "~> 1.8"
 end
diff --git a/splatty.gemspec b/splatty.gemspec
index 44506e3..593fd0a 100644
--- a/splatty.gemspec
+++ b/splatty.gemspec
@@ -19,6 +19,6 @@ Gem::Specification.new do |spec|
   spec.require_paths = ["lib"]
 
   spec.add_dependency "json", "~> 2.0"
-  spec.add_dependency "semantic_logger", "~> 4.15"
+  spec.add_dependency "semantic_logger", ">= 4.15", "< 6.0"
   spec.add_dependency "rails_semantic_logger", ">= 4.17", "< 6.0"
 end