diff --git a/.xlings.json b/.xlings.json
index 5b5539c..da059b5 100644
--- a/.xlings.json
+++ b/.xlings.json
@@ -1,5 +1,5 @@
 {
     "workspace": {
-        "xim:mcpp": "0.0.101"
+        "xim:mcpp": "2026.8.5.4"
     }
 }
diff --git a/README.md b/README.md
index 99dd53b..c9c9df5 100644
--- a/README.md
+++ b/README.md
@@ -27,8 +27,8 @@ mcpp new myplayer --template ffmpeg && cd myplayer && mcpp run -- video.mp4    #
 或在已有项目中手动接入:
 
 ```toml
-[dependencies]
-ffmpeg = "0.0.3"
+[dependencies.ffmpeg]
+ffmpeg = "8.1.2"
 ```
 
 ```cpp
diff --git a/mcpp.toml b/mcpp.toml
index 81f3b8d..7dd1b99 100644
--- a/mcpp.toml
+++ b/mcpp.toml
@@ -1,7 +1,15 @@
+# The namespace names whose library this is, not who packaged it; the version
+# says which upstream you are getting. `mcpplibs` is mcpp's DEFAULT namespace
+# (kDefaultNamespace), not an answer to "whose library"; and `0.0.3` told a
+# consumer nothing about which FFmpeg was inside — it is 8.1.2, which is what
+# the compat.ffmpeg dependency below has said all along.
+#
+# Rule and full migration table: mcpp-index#163.
 [package]
+namespace   = "ffmpeg"
 name        = "ffmpeg"
-version     = "0.0.3"
-description = "FFmpeg C++ modules for mcpp (import ffmpeg.av;) on top of the compat.ffmpeg source build"
+version     = "8.1.2"
+description = "FFmpeg 8.1.2 C++ modules for mcpp (import ffmpeg.av;) on top of the compat.ffmpeg source build"
 license     = "MIT"
 repo        = "https://github.com/mcpplibs/ffmpeg-m"
 platforms   = ["linux", "macos", "windows"]
diff --git a/templates/decode/mcpp.toml.in b/templates/decode/mcpp.toml.in
index ba6c3dd..578ba68 100644
--- a/templates/decode/mcpp.toml.in
+++ b/templates/decode/mcpp.toml.in
@@ -2,5 +2,8 @@
 name        = "{{project.name}}"
 version     = "0.1.0"
 
-[dependencies]
+# `ffmpeg` is spelled out: templates substitute only project.name,
+# self.name and self.version — there is no namespace placeholder yet.
+# See mcpp-index#163.
+[dependencies.ffmpeg]
 {{self.name}} = "{{self.version}}"