diff --git a/Gemfile b/Gemfile
index 2bedb3234fc5bc16a55eaf4a19023a847cc4d9df..ff38308d4c9766bc57f143c97f2fd09f4a23d96e 100644
--- a/Gemfile
+++ b/Gemfile
@@ -457,7 +457,7 @@ gem 'email_reply_trimmer', '~> 0.1'
 gem 'html2text'
 
 gem 'ruby-prof', '~> 1.3.0'
-gem 'stackprof', '~> 0.2.15', require: false
+gem 'stackprof', '~> 0.2.21', require: false
 gem 'rbtrace', '~> 0.4', require: false
 gem 'memory_profiler', '~> 0.9', require: false
 gem 'benchmark-memory', '~> 0.1', require: false
diff --git a/Gemfile.lock b/Gemfile.lock
index 941d9cb1538b67e59c2329cf4ddb0442e98334ac..be6c9289dc7b0ee203bf0a408ac12e6f6585609e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1334,7 +1334,7 @@ GEM
     sqlite3 (1.4.2)
     ssh_data (1.3.0)
     ssrf_filter (1.0.7)
-    stackprof (0.2.15)
+    stackprof (0.2.21)
     state_machines (0.5.0)
     state_machines-activemodel (0.8.0)
       activemodel (>= 5.1)
@@ -1756,7 +1756,7 @@ DEPENDENCIES
   sprite-factory (~> 1.7)
   sprockets (~> 3.7.0)
   ssh_data (~> 1.3)
-  stackprof (~> 0.2.15)
+  stackprof (~> 0.2.21)
   state_machines-activerecord (~> 0.8.0)
   sys-filesystem (~> 1.4.3)
   tanuki_emoji (~> 0.6)