diff --git a/lib/candy_check/app_store/receipt.rb b/lib/candy_check/app_store/receipt.rb
index 423723d..375843b 100644
--- a/lib/candy_check/app_store/receipt.rb
+++ b/lib/candy_check/app_store/receipt.rb
@@ -59,7 +59,7 @@ def item_id
       end
 
       # The quantity of the product
-      # @return [Fixnum]
+      # @return [Integer]
       def quantity
         read_integer('quantity')
       end
diff --git a/lib/candy_check/app_store/verification_failure.rb b/lib/candy_check/app_store/verification_failure.rb
index 8bbb96a..cb11bf0 100644
--- a/lib/candy_check/app_store/verification_failure.rb
+++ b/lib/candy_check/app_store/verification_failure.rb
@@ -2,7 +2,7 @@ module CandyCheck
   module AppStore
     # Represents a failing call against the verification server
     class VerificationFailure
-      # @return [Fixnum] the code of the failure
+      # @return [Integer] the code of the failure
       attr_reader :code
 
       # @return [String] the message of the failure
@@ -10,7 +10,7 @@ class VerificationFailure
 
       # Initializes a new instance which bases on a JSON result
       # from Apple servers
-      # @param code [Fixnum]
+      # @param code [Integer]
       # @param message [String]
       def initialize(code, message)
         @code = code
@@ -20,7 +20,7 @@ def initialize(code, message)
       class << self
         # Gets a known failure or build an unknown failure
         # without description
-        # @param code [Fixnum]
+        # @param code [Integer]
         # @return [VerificationFailure]
         def fetch(code)
           known.fetch(code) do
diff --git a/lib/candy_check/play_store/product_purchases/product_purchase.rb b/lib/candy_check/play_store/product_purchases/product_purchase.rb
index 3270ad8..2c5321a 100644
--- a/lib/candy_check/play_store/product_purchases/product_purchase.rb
+++ b/lib/candy_check/play_store/product_purchases/product_purchase.rb
@@ -26,7 +26,7 @@ def initialize(product_purchase)
         # The purchase state of the order. Possible values are:
         #   * 0: Purchased
         #   * 1: Cancelled
-        # @return [Fixnum]
+        # @return [Integer]
         def purchase_state
           @product_purchase.purchase_state
         end
@@ -34,7 +34,7 @@ def purchase_state
         # The consumption state of the inapp product. Possible values are:
         #   * 0: Yet to be consumed
         #   * 1: Consumed
-        # @return [Fixnum]
+        # @return [Integer]
         def consumption_state
           @product_purchase.consumption_state
         end
@@ -60,7 +60,7 @@ def order_id
 
         # The time the product was purchased, in milliseconds since the
         # epoch (Jan 1, 1970)
-        # @return [Fixnum]
+        # @return [Integer]
         def purchase_time_millis
           @product_purchase.purchase_time_millis
         end
diff --git a/lib/candy_check/play_store/verification_failure.rb b/lib/candy_check/play_store/verification_failure.rb
index 7a0035b..181b85d 100644
--- a/lib/candy_check/play_store/verification_failure.rb
+++ b/lib/candy_check/play_store/verification_failure.rb
@@ -15,7 +15,7 @@ def initialize(error)
       end
 
       # The code of the failure
-      # @return [Fixnum]
+      # @return [Integer]
       def code
         Integer(error.status_code)
       rescue