diff --git a/Gemfile b/Gemfile
index 11759cfa65903a42956026a91b75834c0d5c2911..62f81ef74218f1575ed23b41814234da2ee5b478 100644
--- a/Gemfile
+++ b/Gemfile
@@ -345,7 +345,7 @@ group :development do
   gem 'better_errors', '~> 2.7.1'
 
   # thin instead webrick
-  gem 'thin', '~> 1.7.0'
+  gem 'thin', '~> 1.8.0'
 end
 
 group :development, :test do
diff --git a/Gemfile.lock b/Gemfile.lock
index ab94f963d424f5d573aa1a61c247108382f16f9d..09840798e2a26ca90723c0f05c1b6cf73a5b2866 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -207,7 +207,7 @@ GEM
       git
     css_parser (1.7.0)
       addressable
-    daemons (1.2.6)
+    daemons (1.3.1)
     danger (8.0.6)
       claide (~> 1.0)
       claide-plugins (>= 0.9.2)
@@ -1180,7 +1180,7 @@ GEM
       execjs (>= 0.3.0, < 3)
     test-prof (0.12.0)
     text (1.3.1)
-    thin (1.7.2)
+    thin (1.8.0)
       daemons (~> 1.0, >= 1.0.9)
       eventmachine (~> 1.0, >= 1.0.4)
       rack (>= 1, < 3)
@@ -1534,7 +1534,7 @@ DEPENDENCIES
   sys-filesystem (~> 1.1.6)
   terser (= 1.0.2)
   test-prof (~> 0.12.0)
-  thin (~> 1.7.0)
+  thin (~> 1.8.0)
   timecop (~> 0.9.1)
   toml-rb (~> 1.0.0)
   truncato (~> 0.7.11)