diff --git a/configure.ac b/configure.ac
index 1d0093f4..04a0da51 100644
--- a/configure.ac
+++ b/configure.ac
@@ -41,7 +41,7 @@ VIPS_LIBS=""
 # binary interface changed: increment current, reset revision to 0
 #   binary interface changes backwards compatible?: increment age
 #   binary interface changes not backwards compatible?: reset age to 0
-LIBRARY_REVISION=0
+LIBRARY_REVISION=1
 LIBRARY_CURRENT=57
 LIBRARY_AGE=15
 
diff --git a/meson.build b/meson.build
index 87440d21..faabd1e7 100644
--- a/meson.build
+++ b/meson.build
@@ -1,5 +1,5 @@
 project('vips', 'c', 'cpp',
-    version: '8.13.0',
+    version: '8.13.1',
     meson_version: '>=0.56',
     default_options: [
         # this is what glib uses (one of our required deps), so we use it too
@@ -21,7 +21,7 @@ version_patch = version_parts[2]
 #   binary interface changes not backwards compatible?: reset age to 0
 library_current = 57
 library_age = 15
-library_revision = 0
+library_revision = 1
 library_version = '@0@.@1@.@2@'.format(library_current - library_age, library_age, library_revision)
 darwin_versions = [library_current + 1, '@0@.@1@'.format(library_current + 1, library_revision)]