diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,5 +1,11 @@
 # Changelog for pantry
 
+## v0.7.0
+
+* Change `defaultHackageSecurityConfig` such that field
+  `hscIgnoreExpiry = True`, to be consistent with the defaults of the
+  `WithJSONWarnings HackageSecurityConfig` instance of `FromJSON`.
+
 ## v0.6.0
 
 * Rename `HackageSecurityConfig` as `PackageIndexConfig`,
diff --git a/pantry.cabal b/pantry.cabal
--- a/pantry.cabal
+++ b/pantry.cabal
@@ -5,7 +5,7 @@
 -- see: https://github.com/sol/hpack
 
 name:           pantry
-version:        0.6.0
+version:        0.7.0
 synopsis:       Content addressable Haskell package management
 description:    Please see the README on GitHub at <https://github.com/commercialhaskell/pantry#readme>
 category:       Development
diff --git a/src/Pantry/Types.hs b/src/Pantry/Types.hs
--- a/src/Pantry/Types.hs
+++ b/src/Pantry/Types.hs
@@ -636,8 +636,9 @@
     pure PackageIndexConfig {..}
 
 -- | Default 'HackageSecurityConfig' value using the official Hackage server.
+-- The value of the 'hscIgnoreExpiry' field is 'True'.
 --
--- @since 0.6.0
+-- @since 0.7.0
 defaultHackageSecurityConfig :: HackageSecurityConfig
 defaultHackageSecurityConfig = HackageSecurityConfig
   { hscKeyIds =
@@ -648,7 +649,7 @@
       , "fe331502606802feac15e514d9b9ea83fee8b6ffef71335479a2e68d84adc6b0"
       ]
   , hscKeyThreshold = 3
-  , hscIgnoreExpiry = False
+  , hscIgnoreExpiry = True
   }
 
 -- | Configuration for Hackage Security to securely download package metadata
@@ -667,6 +668,10 @@
   }
   deriving Show
 
+-- | If the @ignore-expiry@ key is absent from the JSON object, assigns default
+-- value 'True'.
+--
+-- @since 0.1.1.0
 instance FromJSON (WithJSONWarnings HackageSecurityConfig) where
   parseJSON = withObjectWarnings "HackageSecurityConfig" $ \o -> do
     hscKeyIds <- o ..: "keyids"