diff --git a/LICENSE b/LICENSE
--- a/LICENSE
+++ b/LICENSE
@@ -48,7 +48,7 @@
 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-Copyright (c) 2015-2017
+Copyright (c) 2015-2024
         Drexel University.
 
 Redistribution and use in source and binary forms, with or without
diff --git a/Text/PrettyPrint/Mainland.hs b/Text/PrettyPrint/Mainland.hs
--- a/Text/PrettyPrint/Mainland.hs
+++ b/Text/PrettyPrint/Mainland.hs
@@ -41,7 +41,7 @@
     -- ** Basic document combinators
     empty,
     srcloc, line, softline, softbreak,
-    (<>), (<|>), (<+>), (</>), (<+/>), (<//>),
+    (<|>), (<+>), (</>), (<+/>), (<//>),
     group, flatten,
 
     -- ** Wrapping documents in delimiters
@@ -337,7 +337,8 @@
 -- | The document @'group' d@ will flatten @d@ to /one/ line if there is
 -- room for it, otherwise the original @d@.
 group :: Doc -> Doc
-group d = flatten d `Alt` d
+group Empty = Empty
+group d     = flatten d `Alt` d
 
 -- | The document @'flatten' d@ will flatten @d@ to /one/ line.
 flatten :: Doc -> Doc
@@ -479,9 +480,10 @@
 -- | The document @'align' d@ renders @d@ with a nesting level set to the current
 -- column.
 align :: Doc -> Doc
-align d = column  $ \k ->
-          nesting $ \i ->
-          nest (k - i) d
+align Empty = Empty
+align d     = column  $ \k ->
+              nesting $ \i ->
+              nest (k - i) d
 
 -- | The document @'hang' i d@ renders @d@ with a nesting level set to the
 -- current column plus @i@, /not including/ the first line.
@@ -532,7 +534,11 @@
                 else spaces (f - w)
 
 -- | Equivalent of 'fail', but with a document instead of a string.
+#if MIN_VERSION_base(4,13,0)
+faildoc :: MonadFail m => Doc -> m a
+#else
 faildoc :: Monad m => Doc -> m a
+#endif
 faildoc = fail . pretty 80
 
 -- | Equivalent of 'error', but with a document instead of a string.
diff --git a/Text/PrettyPrint/Mainland/Class.hs b/Text/PrettyPrint/Mainland/Class.hs
--- a/Text/PrettyPrint/Mainland/Class.hs
+++ b/Text/PrettyPrint/Mainland/Class.hs
@@ -38,6 +38,12 @@
                  Pos(..),
                  posFile)
 import qualified Data.Map as Map
+#if !(MIN_VERSION_base(4,9,0))
+import Data.Monoid (Monoid(..), (<>))
+#endif /* !(MIN_VERSION_base(4,9,0)) */
+#if MIN_VERSION_base(4,9,0) && !(MIN_VERSION_base(4,11,0))
+import Data.Semigroup (Semigroup(..))
+#endif
 import qualified Data.Set as Set
 import qualified Data.Text as T
 import qualified Data.Text.Lazy as L
diff --git a/mainland-pretty.cabal b/mainland-pretty.cabal
--- a/mainland-pretty.cabal
+++ b/mainland-pretty.cabal
@@ -1,11 +1,11 @@
 name:           mainland-pretty
-version:        0.6.2
-cabal-version:  >= 1.6
+version:        0.7.1.1
+cabal-version:  >= 1.10
 license:        BSD3
 license-file:   LICENSE
 copyright:      (c) 2006-2011 Harvard University
                 (c) 2011-2012 Geoffrey Mainland
-                (c) 2015-2018 Drexel University
+                (c) 2015-2024 Drexel University
 author:         Geoffrey Mainland <mainland@drexel.edu>
 maintainer:     Geoffrey Mainland <mainland@drexel.edu>
 stability:      alpha
@@ -19,21 +19,34 @@
                 locations associated with pretty printed values and output
                 appropriate #line pragmas and its ability to produce output
                 in the form of lazy text using a builder.
-tested-with:    GHC==7.4.2, GHC==7.6.3, GHC==7.8.3, GHC==7.10.3, GHC==8.0.2, GHC==8.2.2, GHC==8.4.1
+tested-with:    GHC==8.0.2,
+                GHC==8.2.2,
+                GHC==8.4.3,
+                GHC==8.6.5,
+                GHC==8.8.4,
+                GHC==8.10.7,
+                GHC==9.0.2,
+                GHC==9.2.2,
+                GHC==9.4.8,
+                GHC==9.6.4,
+                GHC==9.8.2,
+                GHC==9.10.1
 
 build-type:     Simple
 
 library
+  default-language: Haskell2010
+
   exposed-modules:
     Text.PrettyPrint.Mainland
     Text.PrettyPrint.Mainland.Class
 
   build-depends:
     base         >= 4.5  && < 5,
-    containers   >= 0.2  && < 0.6,
-    srcloc       >= 0.2  && < 0.6,
-    text         >  0.11 && < 1.3,
-    transformers >  0.3  && < 0.6
+    containers   >= 0.2  && < 0.8,
+    srcloc       >= 0.2  && < 0.7,
+    text         >  0.11 && < 2.2,
+    transformers >  0.3  && < 0.7
 
 source-repository head
   type:     git