diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+### 0.13.8 [2019.09.04]
+* Backport the `Bounded` instance for `Extension`
+  (from `Language.Haskell.TH.LanguageExtensions`), which was introduced in
+  `template-haskell-2.15.0.0`.
+
 ### 0.13.7 [2019.03.24]
 * Backport the `MonadFail Q` instance.
 * Allow building with `template-haskell-2.16` by manually implementing
diff --git a/src/Language/Haskell/TH/Instances.hs b/src/Language/Haskell/TH/Instances.hs
--- a/src/Language/Haskell/TH/Instances.hs
+++ b/src/Language/Haskell/TH/Instances.hs
@@ -74,6 +74,10 @@
 import Unsafe.Coerce (unsafeCoerce)
 #endif
 
+#if MIN_VERSION_template_haskell(2,11,0) && !(MIN_VERSION_template_haskell(2,15,0))
+import Language.Haskell.TH.LanguageExtensions (Extension(..))
+#endif
+
 -- Thanks to Richard Eisenberg, GHC 7.10 adds many of the instances
 -- from this module.
 #if !MIN_VERSION_template_haskell(2,10,0)
@@ -385,6 +389,10 @@
     pure  = return
     (<*>) = ap
 # endif
+#endif
+
+#if MIN_VERSION_template_haskell(2,11,0) && !(MIN_VERSION_template_haskell(2,15,0))
+deriving instance Bounded Extension
 #endif
 
 instance Quasi m => Quasi (ReaderT r m) where
diff --git a/th-orphans.cabal b/th-orphans.cabal
--- a/th-orphans.cabal
+++ b/th-orphans.cabal
@@ -1,5 +1,5 @@
 name:               th-orphans
-version:            0.13.7
+version:            0.13.8
 cabal-version:      >= 1.10
 build-type:         Simple
 license:            BSD3
@@ -19,7 +19,8 @@
                   , GHC == 8.0.2
                   , GHC == 8.2.2
                   , GHC == 8.4.4
-                  , GHC == 8.6.4
+                  , GHC == 8.6.5
+                  , GHC == 8.8.1
 synopsis:           Orphan instances for TH datatypes
 description:        Orphan instances for TH datatypes.  In particular, instances
                     for Ord and Lift, as well as a few missing Show / Eq.  These
@@ -29,7 +30,7 @@
 
 library
   build-depends:      base >= 4.3 && < 5,
-                      template-haskell < 2.15,
+                      template-haskell < 2.16,
                       -- https://github.com/mboes/th-lift/issues/14
                       th-lift >= 0.7.1,
                       th-reify-many >= 0.1 && < 0.2,