diff --git a/ghc-pandoc-types.changes b/ghc-pandoc-types.changes
index 33bb3ac..fada541 100644
--- a/ghc-pandoc-types.changes
+++ b/ghc-pandoc-types.changes
@@ -1,3 +1,66 @@
+-------------------------------------------------------------------
+Wed Nov 13 03:02:28 UTC 2019 - psimons@suse.com
+
+- Update pandoc-types to version 1.20.
+  [1.20]
+
+    * Change all uses of String in type definitions to strict Text
+      (Christian Despres) [API change].  The MetaValue instances using String
+      have been kept, and parallel ones using Text were added.
+
+    * Remove the Arbitrary Text orphan instance (Christian Despres).
+      This instance should not have been in the Text.Pandoc.Arbitrary, since
+      it would have been exported with the rest of the instances in that
+      module. Instead, more shrink* functions were added to compensate for
+      the absence of this instance.
+
+    * Add Text.Pandoc.Legacy.Definition (Christian Despres).
+      To ease the transition to Text, this module provides an interface
+      compatible with the String one, so that any unqualified imports of
+      Text.Pandoc.Definition in other packages can be replaced by
+      Text.Pandoc.Legacy.Definition without other code changes. This is done
+      with PatternSynonyms.
+
+      Some of the constructors of the types Meta, MetaValue, Block, Inline,
+      Format, and Citation required PatternSynonym handling. The Attr and
+      Target types had to be redefined, and certain functions had to be
+      rewritten to handle String or the old Attr and Target types in this
+      module. This module otherwise exports the definitions in
+      Text.Pandoc.Definition unchanged.
+
+      This is not a perfect drop-in replacement, since some imports like
+      Inline(..) will no longer work. This may also cause incomplete pattern
+      warnings when used, since the coverage checker does not seem to be
+      aware of PatternSynonyms.
+
+    * Add Text.Pandoc.Legacy.Builder (Christian Despres).
+      Like Text.Pandoc.Legacy.Definition, this modules provides a
+      compatibility interface while the transition to Text takes
+      place. Unlike that module, this module only requires redefining the
+      ToMetaValue and HasMeta classes and a few functions so that they use
+      the old types. No PatternSynonyms are required.
+
+    * Change Semigroup/Monoid instance for Meta.
+      Previously `<>` was left-biased, so if meta1 and meta2 both
+      contained a field 'foo', the value from meta1 would be retained
+      in `meta1 <> meta2`, and the value from meta2 ignored.
+      This is counterintuitive and doesn't work well with pandoc;
+      for example, we want to be able to override a value in an
+      earlier `--metadata-file` with a later one on the command line.
+
+      It also makes the behavior of metadata more like other
+      things (such as reference links, where later definitions
+      take precedence over earlier ones).
+
+      Note that this change may break some current workflows,
+      if one is relying on metadata fields that occur later in
+      a document to be overridden by those occurring earlier.
+
+-------------------------------------------------------------------
+Fri Nov  8 16:14:21 UTC 2019 - Peter Simons <psimons@suse.com>
+
+- Drop obsolete group attributes.
+
 -------------------------------------------------------------------
 Wed Sep 25 02:02:22 UTC 2019 - psimons@suse.com
 
diff --git a/ghc-pandoc-types.spec b/ghc-pandoc-types.spec
index 2c090ca..78e4797 100644
--- a/ghc-pandoc-types.spec
+++ b/ghc-pandoc-types.spec
@@ -19,7 +19,7 @@
 %global pkg_name pandoc-types
 %bcond_with tests
 Name:           ghc-%{pkg_name}
-Version:        1.17.6.1
+Version:        1.20
 Release:        0
 Summary:        Types for representing a structured document
 License:        GPL-2.0-only
@@ -33,6 +33,7 @@ BuildRequires:  ghc-containers-devel
 BuildRequires:  ghc-deepseq-devel
 BuildRequires:  ghc-rpm-macros
 BuildRequires:  ghc-syb-devel
+BuildRequires:  ghc-text-devel
 BuildRequires:  ghc-transformers-devel
 %if %{with tests}
 BuildRequires:  ghc-HUnit-devel
diff --git a/pandoc-types-1.17.6.1.tar.gz b/pandoc-types-1.17.6.1.tar.gz
deleted file mode 100644
index 886c0e6..0000000
--- a/pandoc-types-1.17.6.1.tar.gz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:1834c2064918a21d346f399c4abcd424617a9a4f0f1e1a8e8ab9b590127edeb4
-size 26363
diff --git a/pandoc-types-1.20.tar.gz b/pandoc-types-1.20.tar.gz
new file mode 100644
index 0000000..b57d171
--- /dev/null
+++ b/pandoc-types-1.20.tar.gz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:aac716bcf493e0cd53428fa8cd892fdd7af3a6184145c25543bf6fe8b94fe873
+size 29505