diff --git a/.github/workflows/backend-pr-ci.yml b/.github/workflows/backend-pr-ci.yml
index 9e5bf95..6c553cb 100644
--- a/.github/workflows/backend-pr-ci.yml
+++ b/.github/workflows/backend-pr-ci.yml
@@ -66,8 +66,14 @@ jobs:
           go-version: ${{ env.GO_VERSION }}
           cache-dependency-path: backend/go.sum
 
+      - name: Setup TinyGo
+        run: |
+          set -euo pipefail
+          curl -sL -o /tmp/tinygo.deb https://github.com/tinygo-org/tinygo/releases/download/v0.41.1/tinygo_0.41.1_amd64.deb
+          sudo dpkg -i /tmp/tinygo.deb
+
       - name: Build WASM
-        run: GOOS=wasip1 GOARCH=wasm go build -buildmode=c-shared -o bdd.wasm .
+        run: tinygo build -target=wasip1 -buildmode=c-shared -o bdd.wasm .
 
   test:
     name: Tests
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 9a8060a..33f5f61 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -22,6 +22,12 @@ jobs:
         with:
           go-version: "1.24"
 
+      - name: Setup TinyGo
+        run: |
+          set -euo pipefail
+          curl -sL -o /tmp/tinygo.deb https://github.com/tinygo-org/tinygo/releases/download/v0.41.1/tinygo_0.41.1_amd64.deb
+          sudo dpkg -i /tmp/tinygo.deb
+
       - name: Setup Bun
         uses: oven-sh/setup-bun@v2
         with:
@@ -32,7 +38,7 @@ jobs:
         run: |
           set -euo pipefail
           mkdir -p ../release/backend
-          GOOS=wasip1 GOARCH=wasm go build -buildmode=c-shared -o ../release/backend/bdd.wasm .
+          tinygo build -target=wasip1 -buildmode=c-shared -o ../release/backend/bdd.wasm .
 
       - name: Build frontend
         working-directory: frontend
diff --git a/README.md b/README.md
index 2c033fd..fd05280 100644
--- a/README.md
+++ b/README.md
@@ -90,8 +90,8 @@ cd backend
 # Run tests
 go test ./...
 
-# Build WASM (requires Go 1.24+)
-GOOS=wasip1 GOARCH=wasm go build -o ../dist/backend.wasm .
+# Build WASM (requires TinyGo — see https://tinygo.org/getting-started/install/)
+tinygo build -target=wasip1 -buildmode=c-shared -o ../dist/backend.wasm .
 ```
 
 ### Frontend
diff --git a/backend/go.mod b/backend/go.mod
index 2cf1f69..bd0accd 100644
--- a/backend/go.mod
+++ b/backend/go.mod
@@ -2,4 +2,4 @@ module github.com/Paca-AI/first-party/bdd
 
 go 1.24
 
-require github.com/Paca-AI/plugin-sdk-go v0.2.0
+require github.com/Paca-AI/plugin-sdk-go v0.3.3
diff --git a/backend/go.sum b/backend/go.sum
index 8389b8f..970bd41 100644
--- a/backend/go.sum
+++ b/backend/go.sum
@@ -1,2 +1,2 @@
-github.com/Paca-AI/plugin-sdk-go v0.2.0 h1:Fur6p+OQoC5imq7qmvaQtJnZ3SRVRskx8KcT/rqFHj4=
-github.com/Paca-AI/plugin-sdk-go v0.2.0/go.mod h1:5WeC6cSEf2wM1ovICZbDaVky9oi5id/Qpdfc5LDAQnw=
+github.com/Paca-AI/plugin-sdk-go v0.3.3 h1:nW2DwJatraYfxo4MpwNkfQEp+9jmj7QHaU16bOXzBpM=
+github.com/Paca-AI/plugin-sdk-go v0.3.3/go.mod h1:5WeC6cSEf2wM1ovICZbDaVky9oi5id/Qpdfc5LDAQnw=
diff --git a/plugin.json b/plugin.json
index 4e006b2..99eb88c 100644
--- a/plugin.json
+++ b/plugin.json
@@ -2,8 +2,8 @@
   "id": "com.paca.bdd",
   "displayName": "BDD Scenarios",
   "description": "Adds Given/When/Then BDD acceptance criteria to tasks.",
-  "version": "0.3.3",
-  "minCoreVersion": "v0.12.2",
+  "version": "0.3.4",
+  "minCoreVersion": "v0.13.3",
   "permissions": ["db.read", "db.write", "events.subscribe"],
   "backend": {
     "eventSubscriptions": ["task.deleted"],