diff --git a/Directory.Build.props b/Directory.Build.props
index ff76fdd..068ba5a 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -10,7 +10,7 @@
     <Deterministic>true</Deterministic>
 
     <!-- The plugin's own version; plugin.json names the same number. -->
-    <Version>0.1.0</Version>
+    <Version>0.1.1</Version>
 
     <!-- The plugin contract, compile-only, from the .nupkg in ./packages-local
          (downloaded from the OpenAC release of the same version). The host
diff --git a/README.md b/README.md
index 81c4e1f..c060839 100644
--- a/README.md
+++ b/README.md
@@ -12,12 +12,12 @@ byte-for-byte what the DECAL plugin sent and accepted; the golden tests under
 ## Building
 
 The plugin contract is `AcDream.Plugin.Abstractions` of the version named in
-`Directory.Build.props` (`PluginApiPackageVersion`), currently 0.1.19, the
-OpenAC 0.1.19 release. Put that release's package in `packages-local/`; an
-OpenAC client from 0.1.19 on loads the plugin.
+`Directory.Build.props` (`PluginApiPackageVersion`), currently 0.1.21, the
+OpenAC 0.1.21 release. Put that release's package in `packages-local/`; an
+OpenAC client from 0.1.21 on loads the plugin.
 
 ```
-gh release download v0.1.19 --repo eriknihlen/OpenAC -p "AcDream.Plugin.Abstractions.0.1.19.nupkg" -D packages-local
+gh release download v0.1.21 --repo eriknihlen/OpenAC -p "AcDream.Plugin.Abstractions.0.1.21.nupkg" -D packages-local
 dotnet build OpenAC.MosswartMassacre.slnx
 dotnet test OpenAC.MosswartMassacre.slnx
 ```
diff --git a/src/OpenAC.MosswartMassacre/plugin.json b/src/OpenAC.MosswartMassacre/plugin.json
index 4cbbf4d..bd7223e 100644
--- a/src/OpenAC.MosswartMassacre/plugin.json
+++ b/src/OpenAC.MosswartMassacre/plugin.json
@@ -1,7 +1,7 @@
 {
   "id": "openac.mosswartmassacre",
   "displayName": "Mosswart Massacre",
-  "version": "0.1.0",
+  "version": "0.1.1",
   "entryDll": "OpenAC.MosswartMassacre.dll",
   "apiVersion": 1,
   "kinds": ["Gameplay"],