diff --git a/index.json b/index.json
index 28833d74..4ca6d792 100644
--- a/index.json
+++ b/index.json
@@ -107,6 +107,11 @@
       "rainbow/version"
     ]
   },
+  "shopify-money": {
+    "requires": [
+      "money"
+    ]
+  },
   "sidekiq": {
     "dependencies": [
       "rails"
diff --git a/rbi/annotations/shopify-money.rbi b/rbi/annotations/shopify-money.rbi
new file mode 100644
index 00000000..a5b26bf8
--- /dev/null
+++ b/rbi/annotations/shopify-money.rbi
@@ -0,0 +1,174 @@
+# typed: strong
+
+class Money
+  sig { returns(BigDecimal) }
+  attr_reader :value
+
+  sig { returns(T.any(Money::Currency, Money::NullCurrency)) }
+  attr_reader :currency
+
+  sig do
+    params(
+      value: T.nilable(T.any(Money, Numeric, String)),
+      currency: T.nilable(T.any(Money::Currency, Money::NullCurrency, String)),
+    )
+      .void
+  end
+  def initialize(value, currency); end
+
+  # @method_missing: delegated to BigDecimal
+  sig { params(args: T.untyped, _arg1: T.untyped, block: T.nilable(T.proc.void)).returns(T::Boolean) }
+  def zero?(*args, **_arg1, &block); end
+
+  # @method_missing: delegated to BigDecimal
+  sig { params(args: T.untyped, _arg1: T.untyped, block: T.nilable(T.proc.void)).returns(T::Boolean) }
+  def nonzero?(*args, **_arg1, &block); end
+
+  # @method_missing: delegated to BigDecimal
+  sig { params(args: T.untyped, _arg1: T.untyped, block: T.nilable(T.proc.void)).returns(T::Boolean) }
+  def positive?(*args, **_arg1, &block); end
+
+  # @method_missing: delegated to BigDecimal
+  sig { params(args: T.untyped, _arg1: T.untyped, block: T.nilable(T.proc.void)).returns(T::Boolean) }
+  def negative?(*args, **_arg1, &block); end
+
+  # @method_missing: delegated to BigDecimal
+  sig { params(args: T.untyped, _arg1: T.untyped, block: T.nilable(T.proc.void)).returns(Integer) }
+  def to_i(*args, **_arg1, &block); end
+
+  # @method_missing: delegated to BigDecimal
+  sig { params(args: T.untyped, _arg1: T.untyped, block: T.nilable(T.proc.void)).returns(Float) }
+  def to_f(*args, **_arg1, &block); end
+
+  # @method_missing: delegated to BigDecimal
+  sig { params(args: T.untyped, _arg1: T.untyped, block: T.nilable(T.proc.void)).returns(Integer) }
+  def hash(*args, **_arg1, &block); end
+
+  class << self
+    sig { params(block: T.nilable(T.proc.params(config: Money::Config).void)).void }
+    def configure(&block); end
+
+    sig do
+      params(
+        value: T.nilable(T.any(Money, Numeric, String)),
+        currency: T.nilable(T.any(Money::Currency, Money::NullCurrency, String)),
+      )
+        .returns(Money)
+    end
+    def new(value = 0, currency = nil); end
+
+    sig do
+      params(
+        subunits: T.nilable(T.any(Money, Numeric, String)),
+        currency_iso: T.nilable(T.any(Money::Currency, Money::NullCurrency, String)),
+        format: Symbol,
+      )
+        .returns(Money)
+    end
+    def from_subunits(subunits, currency_iso, format: :iso4217); end
+
+    sig { params(money1: Money, money2: Money).returns(Rational) }
+    def rational(money1, money2); end
+
+    sig { returns(T.nilable(T.any(Money::Currency, Money::NullCurrency, String))) }
+    def current_currency; end
+
+    sig { params(currency: T.nilable(T.any(Money::Currency, Money::NullCurrency, String))).void }
+    def current_currency=(currency); end
+
+    sig do
+      type_parameters(:U)
+        .params(
+          new_currency: T.nilable(T.any(Money::Currency, Money::NullCurrency, String)),
+          block: T.nilable(T.proc.returns(T.type_parameter(:U))),
+        )
+        .returns(T.type_parameter(:U))
+    end
+    def with_currency(new_currency, &block); end
+  end
+
+  sig { params(format: Symbol).returns(Integer) }
+  def subunits(format: :iso4217); end
+
+  sig { returns(T::Boolean) }
+  def no_currency?; end
+
+  sig { returns(Money) }
+  def -@; end
+
+  sig { params(other: T.untyped).returns(T.nilable(Integer)) }
+  def <=>(other); end
+
+  sig { params(other: T.untyped).returns(Money) }
+  def +(other); end
+
+  sig { params(other: T.untyped).returns(Money) }
+  def -(other); end
+
+  sig { params(numeric: Numeric).returns(Money) }
+  def *(numeric); end
+
+  sig { params(numeric: Numeric).returns(T.noreturn) }
+  def /(numeric); end
+
+  sig { returns(String) }
+  def inspect; end
+
+  sig { params(other: T.untyped).returns(T::Boolean) }
+  def ==(other); end
+
+  sig { params(other: T.untyped).returns(T::Boolean) }
+  def eql?(other); end
+
+  sig { params(currency: T.nilable(T.any(Money::Currency, Money::NullCurrency, String))).returns(Money) }
+  def to_money(currency = nil); end
+
+  sig { returns(BigDecimal) }
+  def to_d; end
+
+  sig { params(style: T.nilable(Symbol)).returns(String) }
+  def to_fs(style = nil); end
+
+  sig { params(options: T.nilable(T::Hash[Symbol, T.untyped])).returns(String) }
+  def to_json(options = nil); end
+
+  sig { params(options: T.nilable(T::Hash[Symbol, T.untyped])).returns(T::Hash[Symbol, String]) }
+  def as_json(options = nil); end
+
+  sig { returns(Money) }
+  def abs; end
+
+  sig { returns(Money) }
+  def floor; end
+
+  sig { params(ndigits: Integer).returns(Money) }
+  def round(ndigits = 0); end
+
+  sig { params(rate: Numeric).returns(Money) }
+  def fraction(rate); end
+
+  sig { params(splits: T::Array[Numeric], strategy: Symbol).returns(T::Array[Money]) }
+  def allocate(splits, strategy); end
+
+  sig { params(maximums: T::Array[Numeric]).returns(T::Array[Money]) }
+  def allocate_max_amounts(maximums); end
+
+  sig { params(num: Numeric).returns(T::Array[Money]) }
+  def split(num); end
+
+  sig { params(num: Numeric).returns(T::Hash[Money, Numeric]) }
+  def calculate_splits(num); end
+
+  sig { params(min: Numeric, max: Numeric).returns(Money) }
+  def clamp(min, max); end
+end
+
+class Numeric
+  sig { params(currency: T.nilable(T.any(Money::Currency, Money::NullCurrency, String))).returns(Money) }
+  def to_money(currency = nil); end
+end
+
+class String
+  sig { params(currency: T.nilable(T.any(Money::Currency, Money::NullCurrency, String))).returns(Money) }
+  def to_money(currency = nil); end
+end