diff --git a/biome.json b/biome.json
index 790aed9..2ea0db8 100644
--- a/biome.json
+++ b/biome.json
@@ -1,7 +1,12 @@
 {
-  "$schema": "https://biomejs.dev/schemas/1.8.0/schema.json",
+  "$schema": "https://biomejs.dev/schemas/1.9.1/schema.json",
   "files": {
-    "ignore": ["coverage/**", "dist/**", "docs/**", "lib/**"]
+    "ignore": [
+      "coverage/**",
+      "dist/**",
+      "docs/**",
+      "lib/**"
+    ]
   },
   "organizeImports": {
     "enabled": true
diff --git a/package.json b/package.json
index 486eee8..9b6005b 100644
--- a/package.json
+++ b/package.json
@@ -28,7 +28,13 @@
     "type": "git",
     "url": "https://github.com/kineticcafe/svelte-fsm-eventless.git"
   },
-  "keywords": ["svelte", "fsm", "finite", "state", "machine"],
+  "keywords": [
+    "svelte",
+    "fsm",
+    "finite",
+    "state",
+    "machine"
+  ],
   "author": "Ken Kunz & Stuart Watt",
   "license": "MIT",
   "bugs": {
@@ -37,7 +43,7 @@
   "homepage": "https://github.com/kineticcafe/svelte-fsm-eventless#README",
   "devDependencies": {
     "-": "0.0.1",
-    "@biomejs/biome": "1.8.3",
+    "@biomejs/biome": "1.9.1",
     "@types/chai": "^4.3.11",
     "@types/sinon": "^17.0.2",
     "chai": "^5.1.1",
@@ -45,5 +51,5 @@
     "sinon": "^18.0.0",
     "typescript": "^5.4.5"
   },
-  "packageManager": "pnpm@9.2.0+sha512.98a80fd11c2e7096747762304106432b3ddc67dcf54b5a8c01c93f68a2cd5e05e6821849522a06fb76284d41a2660d5e334f2ee3bbf29183bf2e739b1dafa771"
+  "packageManager": "pnpm@9.10.0+sha512.73a29afa36a0d092ece5271de5177ecbf8318d454ecd701343131b8ebc0c1a91c487da46ab77c8e596d6acf1461e3594ced4becedf8921b074fbd8653ed7051c"
 }
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 61745d8..189072b 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -12,8 +12,8 @@ importers:
         specifier: 0.0.1
         version: 0.0.1
       '@biomejs/biome':
-        specifier: 1.8.3
-        version: 1.8.3
+        specifier: 1.9.1
+        version: 1.9.1
       '@types/chai':
         specifier: ^4.3.11
         version: 4.3.19
@@ -38,55 +38,55 @@ packages:
   '-@0.0.1':
     resolution: {integrity: sha512-3HfneK3DGAm05fpyj20sT3apkNcvPpCuccOThOPdzz8sY7GgQGe0l93XH9bt+YzibcTIgUAIMoyVJI740RtgyQ==}
 
-  '@biomejs/biome@1.8.3':
-    resolution: {integrity: sha512-/uUV3MV+vyAczO+vKrPdOW0Iaet7UnJMU4bNMinggGJTAnBPjCoLEYcyYtYHNnUNYlv4xZMH6hVIQCAozq8d5w==}
+  '@biomejs/biome@1.9.1':
+    resolution: {integrity: sha512-Ps0Rg0zg3B1zpx+zQHMz5b0n0PBNCAaXttHEDTVrJD5YXR6Uj3T+abTDgeS3wsu4z5i2whqcE1lZxGyWH4bZYg==}
     engines: {node: '>=14.21.3'}
     hasBin: true
 
-  '@biomejs/cli-darwin-arm64@1.8.3':
-    resolution: {integrity: sha512-9DYOjclFpKrH/m1Oz75SSExR8VKvNSSsLnVIqdnKexj6NwmiMlKk94Wa1kZEdv6MCOHGHgyyoV57Cw8WzL5n3A==}
+  '@biomejs/cli-darwin-arm64@1.9.1':
+    resolution: {integrity: sha512-js0brHswq/BoeKgfSEUJYOjUOlML6p65Nantti+PsoQ61u9+YVGIZ7325LK7iUpDH8KVJT+Bx7K2b/6Q//W1Pw==}
     engines: {node: '>=14.21.3'}
     cpu: [arm64]
     os: [darwin]
 
-  '@biomejs/cli-darwin-x64@1.8.3':
-    resolution: {integrity: sha512-UeW44L/AtbmOF7KXLCoM+9PSgPo0IDcyEUfIoOXYeANaNXXf9mLUwV1GeF2OWjyic5zj6CnAJ9uzk2LT3v/wAw==}
+  '@biomejs/cli-darwin-x64@1.9.1':
+    resolution: {integrity: sha512-2zVyjUg5rN0k8XrytkubQWLbp2r/AS5wPhXs4vgVjvqbLnzo32EGX8p61gzroF2dH9DCUCfskdrigCGqNdEbpg==}
     engines: {node: '>=14.21.3'}
     cpu: [x64]
     os: [darwin]
 
-  '@biomejs/cli-linux-arm64-musl@1.8.3':
-    resolution: {integrity: sha512-9yjUfOFN7wrYsXt/T/gEWfvVxKlnh3yBpnScw98IF+oOeCYb5/b/+K7YNqKROV2i1DlMjg9g/EcN9wvj+NkMuQ==}
+  '@biomejs/cli-linux-arm64-musl@1.9.1':
+    resolution: {integrity: sha512-L/JmXKvhsZ1lTgqOr3tWkzuY/NRppdIscHeC9aaiR72WjnBgJS94mawl9BWmGB3aWBc0q6oSDWnBS7617EMMmA==}
     engines: {node: '>=14.21.3'}
     cpu: [arm64]
     os: [linux]
 
-  '@biomejs/cli-linux-arm64@1.8.3':
-    resolution: {integrity: sha512-fed2ji8s+I/m8upWpTJGanqiJ0rnlHOK3DdxsyVLZQ8ClY6qLuPc9uehCREBifRJLl/iJyQpHIRufLDeotsPtw==}
+  '@biomejs/cli-linux-arm64@1.9.1':
+    resolution: {integrity: sha512-QgxwfnG+r2aer5RNGR67Ey91Tv7xXW8E9YckHhwuyWjdLEvKWkrSJrhVG/6ub0kVvTSNkYOuT/7/jMOFBuUbRA==}
     engines: {node: '>=14.21.3'}
     cpu: [arm64]
     os: [linux]
 
-  '@biomejs/cli-linux-x64-musl@1.8.3':
-    resolution: {integrity: sha512-UHrGJX7PrKMKzPGoEsooKC9jXJMa28TUSMjcIlbDnIO4EAavCoVmNQaIuUSH0Ls2mpGMwUIf+aZJv657zfWWjA==}
+  '@biomejs/cli-linux-x64-musl@1.9.1':
+    resolution: {integrity: sha512-gY+eFLIAW45v3WicQHicvjRfA0ntMZHx7h937bXwBMFNFoKmB6rMi6+fKQ6/hiS6juhsFxZdZIz20m15s49J6A==}
     engines: {node: '>=14.21.3'}
     cpu: [x64]
     os: [linux]
 
-  '@biomejs/cli-linux-x64@1.8.3':
-    resolution: {integrity: sha512-I8G2QmuE1teISyT8ie1HXsjFRz9L1m5n83U1O6m30Kw+kPMPSKjag6QGUn+sXT8V+XWIZxFFBoTDEDZW2KPDDw==}
+  '@biomejs/cli-linux-x64@1.9.1':
+    resolution: {integrity: sha512-F0INygtzI2L2n2R1KtYHGr3YWDt9Up1zrUluwembM+iJ1dXN3qzlSb7deFUsSJm4FaIPriqs6Xa56ukdQW6UeQ==}
     engines: {node: '>=14.21.3'}
     cpu: [x64]
     os: [linux]
 
-  '@biomejs/cli-win32-arm64@1.8.3':
-    resolution: {integrity: sha512-J+Hu9WvrBevfy06eU1Na0lpc7uR9tibm9maHynLIoAjLZpQU3IW+OKHUtyL8p6/3pT2Ju5t5emReeIS2SAxhkQ==}
+  '@biomejs/cli-win32-arm64@1.9.1':
+    resolution: {integrity: sha512-7Jahxar3OB+aTPOgXisMJmMKMsjcK+UmdlG3UIOQjzN/ZFEsPV+GT3bfrVjZDQaCw/zes0Cqd7VTWFjFTC/+MQ==}
     engines: {node: '>=14.21.3'}
     cpu: [arm64]
     os: [win32]
 
-  '@biomejs/cli-win32-x64@1.8.3':
-    resolution: {integrity: sha512-/PJ59vA1pnQeKahemaQf4Nyj7IKUvGQSc3Ze1uIGi+Wvr1xF7rGobSrAAG01T/gUDG21vkDsZYM03NAmPiVkqg==}
+  '@biomejs/cli-win32-x64@1.9.1':
+    resolution: {integrity: sha512-liSRWjWzFhyG7s1jg/Bbv9FL+ha/CEd5tFO3+dFIJNplL4TnvAivtyfRVi/tu/pNjISbV1k9JwdBewtAKAgA0w==}
     engines: {node: '>=14.21.3'}
     cpu: [x64]
     os: [win32]
@@ -452,39 +452,39 @@ snapshots:
 
   '-@0.0.1': {}
 
-  '@biomejs/biome@1.8.3':
+  '@biomejs/biome@1.9.1':
     optionalDependencies:
-      '@biomejs/cli-darwin-arm64': 1.8.3
-      '@biomejs/cli-darwin-x64': 1.8.3
-      '@biomejs/cli-linux-arm64': 1.8.3
-      '@biomejs/cli-linux-arm64-musl': 1.8.3
-      '@biomejs/cli-linux-x64': 1.8.3
-      '@biomejs/cli-linux-x64-musl': 1.8.3
-      '@biomejs/cli-win32-arm64': 1.8.3
-      '@biomejs/cli-win32-x64': 1.8.3
-
-  '@biomejs/cli-darwin-arm64@1.8.3':
+      '@biomejs/cli-darwin-arm64': 1.9.1
+      '@biomejs/cli-darwin-x64': 1.9.1
+      '@biomejs/cli-linux-arm64': 1.9.1
+      '@biomejs/cli-linux-arm64-musl': 1.9.1
+      '@biomejs/cli-linux-x64': 1.9.1
+      '@biomejs/cli-linux-x64-musl': 1.9.1
+      '@biomejs/cli-win32-arm64': 1.9.1
+      '@biomejs/cli-win32-x64': 1.9.1
+
+  '@biomejs/cli-darwin-arm64@1.9.1':
     optional: true
 
-  '@biomejs/cli-darwin-x64@1.8.3':
+  '@biomejs/cli-darwin-x64@1.9.1':
     optional: true
 
-  '@biomejs/cli-linux-arm64-musl@1.8.3':
+  '@biomejs/cli-linux-arm64-musl@1.9.1':
     optional: true
 
-  '@biomejs/cli-linux-arm64@1.8.3':
+  '@biomejs/cli-linux-arm64@1.9.1':
     optional: true
 
-  '@biomejs/cli-linux-x64-musl@1.8.3':
+  '@biomejs/cli-linux-x64-musl@1.9.1':
     optional: true
 
-  '@biomejs/cli-linux-x64@1.8.3':
+  '@biomejs/cli-linux-x64@1.9.1':
     optional: true
 
-  '@biomejs/cli-win32-arm64@1.8.3':
+  '@biomejs/cli-win32-arm64@1.9.1':
     optional: true
 
-  '@biomejs/cli-win32-x64@1.8.3':
+  '@biomejs/cli-win32-x64@1.9.1':
     optional: true
 
   '@sinonjs/commons@2.0.0':