diff --git a/app/models/article_unit_ratio.rb b/app/models/article_unit_ratio.rb
index be007f98..69381b20 100644
--- a/app/models/article_unit_ratio.rb
+++ b/app/models/article_unit_ratio.rb
@@ -2,5 +2,5 @@ class ArticleUnitRatio < ApplicationRecord
   belongs_to :article_version
 
   validates :quantity, :sort, :unit, presence: true
-  validates :quantity, numericality: { greater_than: 0 }
+  validates :quantity, numericality: { greater_than: 0, less_than: 10**35 }
 end
diff --git a/db/migrate/20240316190957_alter_articles_add_more_unit_logic.rb b/db/migrate/20240316190957_alter_articles_add_more_unit_logic.rb
index 79114105..66cf318b 100644
--- a/db/migrate/20240316190957_alter_articles_add_more_unit_logic.rb
+++ b/db/migrate/20240316190957_alter_articles_add_more_unit_logic.rb
@@ -14,7 +14,7 @@ def up
       t.references :article_version, null: false
 
       t.column :sort, :integer, null: false, index: true
-      t.column :quantity, :decimal, precision: 8, scale: 3, null: false
+      t.column :quantity, :decimal, precision: 38, scale: 3, null: false
       t.column :unit, :string, length: 3
     end
 
diff --git a/db/schema.rb b/db/schema.rb
index e727e560..34793875 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -58,7 +58,7 @@
   create_table "article_unit_ratios", charset: "utf8mb4", collation: "utf8mb4_general_ci", force: :cascade do |t|
     t.bigint "article_version_id", null: false
     t.integer "sort", null: false
-    t.decimal "quantity", precision: 8, scale: 3, null: false
+    t.decimal "quantity", precision: 38, scale: 3, null: false
     t.string "unit"
     t.index ["article_version_id"], name: "index_article_unit_ratios_on_article_version_id"
     t.index ["sort"], name: "index_article_unit_ratios_on_sort"