diff --git a/example/Gemfile b/example/Gemfile
index c4cf2ac4..88ffbfdb 100644
--- a/example/Gemfile
+++ b/example/Gemfile
@@ -7,7 +7,7 @@ ruby ">= 2.6.10"
 gem 'cocoapods', '>= 1.13', '!= 1.15.0', '!= 1.15.1'
 gem 'activesupport', '>= 6.1.7.5', '!= 7.1.0'
 gem 'xcodeproj', '< 1.26.0'
-gem 'concurrent-ruby', '< 1.3.4'
+gem 'concurrent-ruby', '< 1.3.8'
 
 # Ruby 3.4.0 has removed some libraries from the standard library.
 gem 'bigdecimal'
diff --git a/example/Gemfile.lock b/example/Gemfile.lock
index 039adee0..f8d0d54f 100644
--- a/example/Gemfile.lock
+++ b/example/Gemfile.lock
@@ -5,7 +5,7 @@ GEM
       base64
       nkf
       rexml
-    activesupport (7.2.2.2)
+    activesupport (7.2.3.1)
       base64
       benchmark (>= 0.3)
       bigdecimal
@@ -14,11 +14,11 @@ GEM
       drb
       i18n (>= 1.6, < 2)
       logger (>= 1.4.2)
-      minitest (>= 5.1)
+      minitest (>= 5.1, < 6)
       securerandom (>= 0.3)
       tzinfo (~> 2.0, >= 2.0.5)
-    addressable (2.8.7)
-      public_suffix (>= 2.0.2, < 7.0)
+    addressable (2.9.0)
+      public_suffix (>= 2.0.2, < 8.0)
     algoliasearch (1.27.5)
       httpclient (~> 2.8, >= 2.8.3)
       json (>= 1.5.1)
@@ -65,8 +65,8 @@ GEM
       netrc (~> 0.11)
     cocoapods-try (1.2.0)
     colored2 (3.1.2)
-    concurrent-ruby (1.3.3)
-    connection_pool (2.5.4)
+    concurrent-ruby (1.3.7)
+    connection_pool (3.0.2)
     drb (2.2.3)
     escape (0.0.4)
     ethon (0.15.0)
@@ -77,20 +77,17 @@ GEM
     gh_inspector (1.1.3)
     httpclient (2.9.0)
       mutex_m
-    i18n (1.14.7)
+    i18n (1.15.2)
       concurrent-ruby (~> 1.0)
-    json (2.15.1)
+    json (2.15.2.1)
     logger (1.7.0)
-    minitest (6.0.5)
-      drb (~> 2.0)
-      prism (~> 1.5)
+    minitest (5.27.0)
     molinillo (0.8.0)
     mutex_m (0.3.0)
     nanaimo (0.3.0)
     nap (1.1.0)
     netrc (0.11.0)
     nkf (0.2.0)
-    prism (1.9.0)
     public_suffix (4.0.7)
     rexml (3.4.4)
     ruby-macho (2.5.1)
@@ -115,7 +112,7 @@ DEPENDENCIES
   benchmark
   bigdecimal
   cocoapods (>= 1.13, != 1.15.1, != 1.15.0)
-  concurrent-ruby (< 1.3.4)
+  concurrent-ruby (< 1.3.8)
   logger
   mutex_m
   nkf