diff --git a/Gemfile b/Gemfile
index 5adba4d58df4e841b5382fa9ce1e3c28e061d674..dd9146511b81869687d917bccda94bc55216ce98 100644
--- a/Gemfile
+++ b/Gemfile
@@ -90,7 +90,7 @@ gem 'kaminari', '~> 1.0'
 gem 'hamlit', '~> 2.6.1'
 
 # Files attachments
-gem 'carrierwave', '~> 1.1'
+gem 'carrierwave', '~> 1.2'
 
 # Drag and Drop UI
 gem 'dropzonejs-rails', '~> 0.7.1'
diff --git a/Gemfile.lock b/Gemfile.lock
index 53efb1c76c2532bfdd047825219be0c25ced9e96..e4a323dde7b300a6844694a1b1a4de0d3cd73049 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -107,7 +107,7 @@ GEM
     capybara-screenshot (1.0.14)
       capybara (>= 1.0, < 3)
       launchy
-    carrierwave (1.1.0)
+    carrierwave (1.2.1)
       activemodel (>= 4.0.0)
       activesupport (>= 4.0.0)
       mime-types (>= 1.16)
@@ -990,7 +990,7 @@ DEPENDENCIES
   bundler-audit (~> 0.5.0)
   capybara (~> 2.15.0)
   capybara-screenshot (~> 1.0.0)
-  carrierwave (~> 1.1)
+  carrierwave (~> 1.2)
   charlock_holmes (~> 0.7.5)
   chronic (~> 0.10.2)
   chronic_duration (~> 0.10.6)
diff --git a/changelogs/unreleased/39580-bump-carrierwave-to-1-2-1.yml b/changelogs/unreleased/39580-bump-carrierwave-to-1-2-1.yml
new file mode 100644
index 0000000000000000000000000000000000000000..bda85ac24e0369fd8400a50a05f72cbbc42fd45c
--- /dev/null
+++ b/changelogs/unreleased/39580-bump-carrierwave-to-1-2-1.yml
@@ -0,0 +1,5 @@
+---
+title: Bump carrierwave to 1.2.1
+merge_request: 15072
+author: Takuya Noguchi
+type: other