diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6c0e45ebc..a99282cab 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -251,7 +251,7 @@ include(CMakePushCheckState)
 include(CheckSymbolExists)
 
 if (NOT FT_DISABLE_HARFBUZZ)
-  set(HARFBUZZ_MIN_VERSION "2.6.8")
+  set(HARFBUZZ_MIN_VERSION "2.0.0")
 
   if (FT_DYNAMIC_HARFBUZZ)
     if (WIN32)  # Windows uses its own LoadLibrary()
diff --git a/builds/unix/configure.raw b/builds/unix/configure.raw
index 898e617c4..9a8d604f3 100644
--- a/builds/unix/configure.raw
+++ b/builds/unix/configure.raw
@@ -447,7 +447,7 @@ AC_ARG_WITH([harfbuzz],
 
 have_harfbuzz=no
 if test x"$with_harfbuzz" = xyes -o x"$with_harfbuzz" = xauto; then
-  harfbuzz_pkg="harfbuzz >= 2.6.8"
+  harfbuzz_pkg="harfbuzz >= 2.0.0"
   have_harfbuzz_pkg=no
 
   if test x"$HARFBUZZ_CFLAGS" = x -a x"$HARFBUZZ_LIBS" = x; then
diff --git a/docs/CHANGES b/docs/CHANGES
index 41e3ec6c2..e5fe3306c 100644
--- a/docs/CHANGES
+++ b/docs/CHANGES
@@ -10,9 +10,7 @@ CHANGES BETWEEN 2.13.3 and 2.14.0 (2025-Mmm-DD)
     between HarfBuzz and FreeType.
 
     A  side effect  of this  change is  that FreeType  no longer  uses
-    HarfBuzz header files (if HarfBuzz support is activated).  To make
-    this  work,  we  now  require at  least  HarfBuzz  version  2.6.8,
-    released in June 2020.
+    HarfBuzz header files (if HarfBuzz support is activated).
 
     This code was contributed by Behdad Esfahbod.
 
@@ -35,8 +33,6 @@ CHANGES BETWEEN 2.13.3 and 2.14.0 (2025-Mmm-DD)
     (or must be able to construct such a cmap) of a given font to make
     this work.
 
-    You need HarfBuzz 7.2.0 or newer for the new diacritic support.
-
     The central algorithm and the foundation of this feature was Craig
     White's GSoC 2023 project.
 
diff --git a/meson.build b/meson.build
index a9bf932c8..1d2480c31 100644
--- a/meson.build
+++ b/meson.build
@@ -354,7 +354,7 @@ harfbuzz_dep = disabler()
 
 if harfbuzz_opt == 'enabled' or harfbuzz_opt == 'auto'
   harfbuzz_dep = dependency('harfbuzz',
-    version: '>= 2.6.8',
+    version: '>= 2.0.0',
     required: harfbuzz_opt == 'enabled',
     default_options: ['freetype=disabled'])
   if harfbuzz_dep.found()
diff --git a/src/autofit/ft-hb-decls.h b/src/autofit/ft-hb-decls.h
index d3fbff6a9..032d4d37a 100644
--- a/src/autofit/ft-hb-decls.h
+++ b/src/autofit/ft-hb-decls.h
@@ -135,14 +135,6 @@ hb_ot_layout_lookup_collect_glyphs,(hb_face_t    *face,
 				    hb_set_t     *glyphs_after,  /* OUT.  May be NULL */
 				    hb_set_t     *glyphs_output  /* OUT.  May be NULL */))
 
-HB_EXTERN(unsigned,
-hb_ot_layout_lookup_get_glyph_alternates,(hb_face_t      *face,
-					  unsigned        lookup_index,
-					  hb_codepoint_t  glyph,
-					  unsigned        start_offset,
-					  unsigned       *alternate_count /* IN/OUT */,
-					  hb_codepoint_t *alternate_glyphs /* OUT */))
-
 HB_EXTERN(hb_bool_t,
 hb_ot_layout_lookup_would_substitute,(hb_face_t            *face,
 				      unsigned int          lookup_index,