diff --git a/package-lock.json b/package-lock.json
index 0df4a301..618eb0bd 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -17,6 +17,7 @@
         "tone": "^14.7.77"
       },
       "devDependencies": {
+        "@tonaljs/tonal": "^4.6.5",
         "mocha": "^9.1.4",
         "ramda": "^0.28.0",
         "snowpack": "^3.8.8"
@@ -450,6 +451,226 @@
         "node": ">=10"
       }
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     "node_modules/@tootallnate/once": {
       "version": "1.1.2",
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@@ -5353,6 +5574,226 @@
         "defer-to-connect": "^2.0.0"
       }
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diff --git a/package.json b/package.json
index 02962303..f8759f96 100644
--- a/package.json
+++ b/package.json
@@ -24,6 +24,7 @@
   },
   "homepage": "https://github.com/yaxu/strudel#readme",
   "devDependencies": {
+    "@tonaljs/tonal": "^4.6.5",
     "mocha": "^9.1.4",
     "ramda": "^0.28.0",
     "snowpack": "^3.8.8"