diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,6 @@
+### 0.13.5 [2018.01.18]
+* Implement `qAddCorePlugin` for `Quasi` instances
+
 ### 0.13.4 [2017.07.26]
 * Implement `qAddForeignFile` for `Quasi` instances
 
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
@@ -387,6 +387,9 @@
 #if MIN_VERSION_template_haskell(2,12,0)
   qAddForeignFile a b = MTL.lift $ qAddForeignFile a b
 #endif
+#if MIN_VERSION_template_haskell(2,13,0)
+  qAddCorePlugin      = MTL.lift . qAddCorePlugin
+#endif
 
 instance (Quasi m, Monoid w) => Quasi (WriterT w m) where
   qNewName            = MTL.lift . qNewName
@@ -420,6 +423,9 @@
 #if MIN_VERSION_template_haskell(2,12,0)
   qAddForeignFile a b = MTL.lift $ qAddForeignFile a b
 #endif
+#if MIN_VERSION_template_haskell(2,13,0)
+  qAddCorePlugin      = MTL.lift . qAddCorePlugin
+#endif
 
 instance Quasi m => Quasi (StateT s m) where
   qNewName            = MTL.lift . qNewName
@@ -453,6 +459,9 @@
 #if MIN_VERSION_template_haskell(2,12,0)
   qAddForeignFile a b = MTL.lift $ qAddForeignFile a b
 #endif
+#if MIN_VERSION_template_haskell(2,13,0)
+  qAddCorePlugin      = MTL.lift . qAddCorePlugin
+#endif
 
 instance (Quasi m, Monoid w) => Quasi (RWST r w s m) where
   qNewName            = MTL.lift . qNewName
@@ -485,6 +494,9 @@
 #endif
 #if MIN_VERSION_template_haskell(2,12,0)
   qAddForeignFile a b = MTL.lift $ qAddForeignFile a b
+#endif
+#if MIN_VERSION_template_haskell(2,13,0)
+  qAddCorePlugin      = MTL.lift . qAddCorePlugin
 #endif
 
 #if MIN_VERSION_base(4,7,0) && defined(LANGUAGE_DeriveDataTypeable) && __GLASGOW_HASKELL__ < 710
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:            0.13.4
+version:            0.13.5
 cabal-version:      >= 1.10
 build-type:         Simple
 license:            BSD3
@@ -17,7 +17,8 @@
                   , GHC == 7.8.4
                   , GHC == 7.10.3
                   , GHC == 8.0.2
-                  , GHC == 8.2.1
+                  , GHC == 8.2.2
+                  , GHC == 8.4.1
 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
@@ -26,36 +27,37 @@
 extra-source-files: CHANGELOG.md, README.md
 
 library
-  build-depends:    base >= 4.3 && < 5,
-                    template-haskell,
-                    -- https://github.com/mboes/th-lift/issues/14
-                    th-lift >= 0.7.1,
-                    th-reify-many >= 0.1 && < 0.2,
-                    th-lift-instances,
-                    mtl
+  build-depends:      base >= 4.3 && < 5,
+                      template-haskell,
+                      -- https://github.com/mboes/th-lift/issues/14
+                      th-lift >= 0.7.1,
+                      th-reify-many >= 0.1 && < 0.2,
+                      th-lift-instances,
+                      mtl
 
   -- Use TH to derive Generics instances instead of DeriveGeneric, for < 7.10
   if impl(ghc < 7.10)
-    build-depends:  generic-deriving >= 1.9
+    build-depends:    generic-deriving >= 1.9
 
   -- Prior to GHC 7.6, GHC generics lived in ghc-prim
   if impl(ghc >= 7.2) && impl(ghc < 7.6)
-    build-depends:  ghc-prim
+    build-depends:    ghc-prim
 
-  hs-source-dirs:   src
-  ghc-options:      -Wall
-  exposed-modules:  Language.Haskell.TH.Instances
-  default-language: Haskell2010
+  hs-source-dirs:     src
+  ghc-options:        -Wall
+  exposed-modules:    Language.Haskell.TH.Instances
+  default-language:   Haskell2010
 
 test-suite test
-  type:             exitcode-stdio-1.0
-  hs-source-dirs:   test
-  main-is:          Spec.hs
-  build-depends:    base,
-                    th-orphans,
-                    hspec,
-                    template-haskell
-  default-language: Haskell2010
+  type:               exitcode-stdio-1.0
+  hs-source-dirs:     test
+  main-is:            Spec.hs
+  build-depends:      base,
+                      th-orphans,
+                      hspec,
+                      template-haskell
+  build-tool-depends: hspec-discover:hspec-discover
+  default-language:   Haskell2010
 
 source-repository head
   type:     git