diff --git a/CMakeLists.txt b/CMakeLists.txt
index e16caa92c..2c39e3732 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -17,9 +17,9 @@ endif()
 set(PROJECT_NAME "cmark")
 
 set(PROJECT_VERSION_MAJOR 0)
-set(PROJECT_VERSION_MINOR 27)
-set(PROJECT_VERSION_PATCH 1)
-set(PROJECT_VERSION_GFM 4)
+set(PROJECT_VERSION_MINOR 28)
+set(PROJECT_VERSION_PATCH 0)
+set(PROJECT_VERSION_GFM 5)
 set(PROJECT_VERSION ${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR}.${PROJECT_VERSION_PATCH}.gfm.${PROJECT_VERSION_GFM} )
 
 option(CMARK_TESTS "Build cmark tests and enable testing" ON)
diff --git a/changelog.txt b/changelog.txt
index 512602ae4..4a26aa691 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -1,3 +1,11 @@
+[0.28.0.gfm.5]
+
+  * Latest spec.
+  * Fix a typo in the spec (John Gardner).
+  * Fix quadratic behavior in reference lookups.
+  * Add `core_extensions_ensure_registered`.
+  * Add sourcepos information for inlines.
+
 [0.27.1.gfm.4]
 
   * Fix regression with nested parentheses in link targets (#48).