diff --git a/Build.ps1 b/Build.ps1
index 23439f1..f4b02ec 100644
--- a/Build.ps1
+++ b/Build.ps1
@@ -29,5 +29,8 @@ if ($LASTEXITCODE) { exit 1 }
 cargo build --release --target=x86_64-pc-windows-msvc
 if ($LASTEXITCODE) { exit 1 }
 
+cargo build --release --target=wasm32-wasip1
+if ($LASTEXITCODE) { exit 1 }
+
 & .\tool\nuget.exe pack .\Seq.App.JsonArchive.nuspec -version $version -outputdirectory .\publish
 exit $LASTEXITCODE
diff --git a/appveyor.yml b/appveyor.yml
index 56cfbd5..921107d 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,6 +1,6 @@
 version: '{build}'
 skip_tags: true
-image: Visual Studio 2017
+image: Visual Studio 2022
 
 # Courtesy of https://github.com/starkat99/appveyor-rust/
 install:
@@ -9,6 +9,7 @@ install:
   - set PATH=%PATH%;%USERPROFILE%\.cargo\bin
   - rustup target add x86_64-unknown-linux-musl
   - rustup target add aarch64-unknown-linux-musl
+  - rustup target add wasm32-wasip1
   - rustc -vV
   - cargo -vV
 
diff --git a/jsonarchive.exe.d.json b/jsonarchive.exe.d.json
index 6494763..19e7db9 100644
--- a/jsonarchive.exe.d.json
+++ b/jsonarchive.exe.d.json
@@ -13,6 +13,10 @@
     },
     "linux-arm64": {
       "executable": "linux-arm64/jsonarchive"
+    },
+    "wasm32-wasip1": {
+      "module": "wasm32-wasip1/jsonarchive.wasm",
+      "grant": ["dir"]
     }
   },
   "settings": {