diff --git a/tools/meson.build b/tools/meson.build
index 4fd556c..6f0e444 100644
--- a/tools/meson.build
+++ b/tools/meson.build
@@ -1,3 +1,29 @@
+sdbusplusplus_depfiles = files(
+  'sdbus++',
+  'sdbusplus/enum.py',
+  'sdbusplus/error.py',
+  'sdbusplus/__init__.py',
+  'sdbusplus/interface.py',
+  'sdbusplus/main.py',
+  'sdbusplus/method.py',
+  'sdbusplus/namedelement.py',
+  'sdbusplus/property.py',
+  'sdbusplus/renderer.py',
+  'sdbusplus/signal.py',
+  'sdbusplus/templates/error.cpp.mako',
+  'sdbusplus/templates/error.hpp.mako',
+  'sdbusplus/templates/error.md.mako',
+  'sdbusplus/templates/interface.client.hpp.mako',
+  'sdbusplus/templates/interface.md.mako',
+  'sdbusplus/templates/interface.server.cpp.mako',
+  'sdbusplus/templates/interface.server.hpp.mako',
+  'sdbusplus/templates/method.md.mako',
+  'sdbusplus/templates/method.prototype.hpp.mako',
+  'sdbusplus/templates/property.md.mako',
+  'sdbusplus/templates/property.prototype.hpp.mako',
+  'sdbusplus/templates/signal.md.mako',
+  'sdbusplus/templates/signal.prototype.hpp.mako',
+)
 meson.override_find_program('sdbus++', files('sdbus++'))
 sdbusplusplus_prog = find_program('sdbus++', native: true)
 
diff --git a/tools/sdbus++-gen-meson b/tools/sdbus++-gen-meson
index 549eb58..7e46f9c 100755
--- a/tools/sdbus++-gen-meson
+++ b/tools/sdbus++-gen-meson
@@ -36,7 +36,7 @@
 ## if a repository contains old copies of the generated meson.build files and
 ## needs an update.  We should increment the version number whenever the
 ## resulting meson.build would change.
-tool_version="sdbus++-gen-meson version 3"
+tool_version="sdbus++-gen-meson version 4"
 function show_version {
     echo "${tool_version}"
 }
@@ -205,6 +205,7 @@
     '$1__cpp'.underscorify(),
     input: [ ${sources} ],
     output: [ ${outputs} ],
+    depend_files: sdbusplusplus_depfiles,
     command: [
         sdbuspp_gen_meson_prog, '--command', 'cpp',
         '--output', meson.current_build_dir(),
@@ -236,6 +237,7 @@
     '$1__markdown'.underscorify(),
     input: [ ${sources} ],
     output: [ '$(basename "$1").md' ],
+    depend_files: sdbusplusplus_depfiles,
     command: [
         sdbuspp_gen_meson_prog, '--command', 'markdown',
         '--output', meson.current_build_dir(),