diff --git a/lib/use_case/mute_rule/create.rb b/lib/use_case/mute_rule/create.rb
index 68a587aa..eee45dd6 100644
--- a/lib/use_case/mute_rule/create.rb
+++ b/lib/use_case/mute_rule/create.rb
@@ -7,7 +7,7 @@ module UseCase
       option :phrase, type: Types::Coercible::String
 
       def call
-        rule = ::MuteRule.create(
+        rule = ::MuteRule.create!(
           user:,
           muted_phrase: phrase
         )