diff --git a/package.json b/package.json
index b08083f..4e96010 100644
--- a/package.json
+++ b/package.json
@@ -33,7 +33,7 @@
   },
   "homepage": "https://github.com/emailable/emailable-node#readme",
   "devDependencies": {
-    "chai": "^4.2.0",
+    "chai": "^6.2.2",
     "eslint": "^10.0.0",
     "eslint-config-cache-ventures": "^2.0.2",
     "mocha": "^11.0.1",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index bd48c76..1a2054c 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -13,8 +13,8 @@ importers:
         version: 1.13.5
     devDependencies:
       chai:
-        specifier: ^4.2.0
-        version: 4.3.6
+        specifier: ^6.2.2
+        version: 6.2.2
       eslint:
         specifier: ^10.0.0
         version: 10.0.0
@@ -185,9 +185,6 @@ packages:
     resolution: {integrity: sha512-3CYzex9M9FGQjCGMGyi6/31c8GJbgb0qGyrx5HWxPd0aCwh4cB2YjMb2Xf9UuoogrMrlO9cTqnB5rI5GHZTcUA==}
     engines: {node: '>=0.10.0'}
 
-  assertion-error@1.1.0:
-    resolution: {integrity: sha512-jgsaNduz+ndvGyFt3uSuWqvy4lCnIJiovtouQN5JZHOKCS2QuhEdbcQHFhVksz2N2U9hXJo8odG7ETyWlEeuDw==}
-
   asynckit@0.4.0:
     resolution: {integrity: sha512-Oei9OH4tRh0YqU3GxhX79dM/mwVgvbZJaSNaRk+bshkj0S5cfHcgYakreBjrHwatXKbz+IoIdYLxrKim2MjW0Q==}
 
@@ -231,17 +228,14 @@ packages:
     resolution: {integrity: sha512-Gmy6FhYlCY7uOElZUSbxo2UCDH8owEk996gkbrpsgGtrJLM3J7jGxl9Ic7Qwwj4ivOE5AWZWRMecDdF7hqGjFA==}
     engines: {node: '>=10'}
 
-  chai@4.3.6:
-    resolution: {integrity: sha512-bbcp3YfHCUzMOvKqsztczerVgBKSsEijCySNlHHbX3VG1nskvqjz5Rfso1gGwD6w6oOV3eI60pKuMOV5MV7p3Q==}
-    engines: {node: '>=4'}
+  chai@6.2.2:
+    resolution: {integrity: sha512-NUPRluOfOiTKBKvWPtSD4PhFvWCqOi0BGStNWs57X9js7XGTprSmFoz5F0tWhR4WPjNeR9jXqdC7/UpSJTnlRg==}
+    engines: {node: '>=18'}
 
   chalk@4.1.2:
     resolution: {integrity: sha512-oKnbhFyRIXpUuez8iBMmyEa4nbj4IOQyuhc/wy9kY7/WVPcwIO9VA668Pu8RkO7+0G76SLROeyw9CpQ061i4mA==}
     engines: {node: '>=10'}
 
-  check-error@1.0.2:
-    resolution: {integrity: sha512-BrgHpW9NURQgzoNyjfq0Wu6VFO6D7IZEmJNdtgNqpzGG8RuNFHt2jQxWlAs4HMe119chBnv+34syEZtc6IhLtA==}
-
   chokidar@4.0.3:
     resolution: {integrity: sha512-Qgzu8kfBvo+cA4962jnP1KkS6Dop5NS6g7R5LFYJr4b8Ub94PPQXUksCw9PvXoeXPRRddRNC5C1JQUR2SMGtnA==}
     engines: {node: '>= 14.16.0'}
@@ -286,10 +280,6 @@ packages:
     resolution: {integrity: sha512-9iE1PgSik9HeIIw2JO94IidnE3eBoQrFJ3w7sFuzSX4DpmZ3v5sZpUiV5Swcf6mQEF+Y0ru8Neo+p+nyh2J+hQ==}
     engines: {node: '>=10'}
 
-  deep-eql@3.0.1:
-    resolution: {integrity: sha512-+QeIQyN5ZuO+3Uk5DYh6/1eKO0m0YmJFGNmFHGACpf1ClL1nmlV/p4gNgbl2pJGxgXb4faqo6UE+M5ACEMyVcw==}
-    engines: {node: '>=0.12'}
-
   deep-is@0.1.4:
     resolution: {integrity: sha512-oIPzksmTg4/MriiaYGO+okXDT7ztn/w3Eptv/+gSIdMdKsJo0u4CfYNFJPy+4SKMuCqGw2wxnA+URMg3t8a/bQ==}
 
@@ -470,9 +460,6 @@ packages:
     resolution: {integrity: sha512-DyFP3BM/3YHTQOCUL/w0OZHR0lpKeGrxotcHWcqNEdnltqFwXVfhEBQ94eIo34AfQpo0rGki4cyIiftY06h2Fg==}
     engines: {node: 6.* || 8.* || >= 10.*}
 
-  get-func-name@2.0.2:
-    resolution: {integrity: sha512-8vXOvuE167CtIc3OyItco7N/dpRtBbYOsPsXCz7X/PMnlGjYjSGuZJgM1Y7mmew7BKf9BqvLX2tnOVy1BBUsxQ==}
-
   get-intrinsic@1.3.0:
     resolution: {integrity: sha512-9fSjSaos/fRIVIp+xSJlE6lfwhES7LNtKaCBIamHsjr2na1BiABJPo0mOjjz8GJDURarmCPGqaiVg5mfjb98CQ==}
     engines: {node: '>= 0.4'}
@@ -651,10 +638,6 @@ packages:
     resolution: {integrity: sha512-8XPvpAA8uyhfteu8pIvQxpJZ7SYYdpUivZpGy6sFsBuKRY/7rQGavedeB8aK+Zkyq6upMFVL/9AW6vOYzfRyLg==}
     engines: {node: '>=10'}
 
-  loupe@2.3.1:
-    resolution: {integrity: sha512-EN1D3jyVmaX4tnajVlfbREU4axL647hLec1h/PXAb8CPDMJiYitcWF2UeLVNttRqaIqQs4x+mRvXf+d+TlDrCA==}
-    deprecated: Please upgrade to 2.3.7 which fixes GHSA-4q6p-r6v2-jvc5
-
   lru-cache@10.4.3:
     resolution: {integrity: sha512-JNAzZcXrCt42VGLuYz0zfAzDfAvJWW6AfYlDBQyDV5DClI2m5sAmK+OIO7s59XfsRsWHp02jAJrRadPRGTt6SQ==}
 
@@ -782,9 +765,6 @@ packages:
     resolution: {integrity: sha512-gDKb8aZMDeD/tZWs9P6+q0J9Mwkdl6xMV8TjnGP3qJVJ06bdMgkbBlLU8IdfOsIsFz2BW1rNVT3XuNEl8zPAvw==}
     engines: {node: '>=8'}
 
-  pathval@1.1.1:
-    resolution: {integrity: sha512-Dp6zGqpTdETdR63lehJYPeIOqpiNBNtc7BpWSLrOje7UaIsE5aY92r/AunQA7rsXvet3lrJ3JnZX29UPTKXyKQ==}
-
   picocolors@1.1.1:
     resolution: {integrity: sha512-xceH2snhtb5M9liqDsmEw56le376mTZkEX/jEb/RxNFyegNul7eNslCXP9FDj/Lcu0X8KEyMceP2ntpaHrDEVA==}
 
@@ -956,10 +936,6 @@ packages:
     resolution: {integrity: sha512-XleUoc9uwGXqjWwXaUTZAmzMcFZ5858QA2vvx1Ur5xIcixXIP+8LnFDgRplU30us6teqdlskFfu+ae4K79Ooew==}
     engines: {node: '>= 0.8.0'}
 
-  type-detect@4.0.8:
-    resolution: {integrity: sha512-0fr/mIH1dlO+x7TlcMy+bIDqKPsw/70tVyeHW787goQjhmqaZe10uwLujubK9q9Lg6Fiho1KUKDYz0Z7k7g5/g==}
-    engines: {node: '>=4'}
-
   type-fest@0.18.1:
     resolution: {integrity: sha512-OIAYXk8+ISY+qTOwkHtKqzAuxchoMiD9Udx+FSGQDuiRR+PJKJHc2NJAXlbhkGwTt/4/nKZxELY1w3ReWOL8mw==}
     engines: {node: '>=10'}
@@ -1164,8 +1140,6 @@ snapshots:
 
   arrify@1.0.1: {}
 
-  assertion-error@1.1.0: {}
-
   asynckit@0.4.0: {}
 
   axios@1.13.5:
@@ -1211,23 +1185,13 @@ snapshots:
 
   camelcase@6.3.0: {}
 
-  chai@4.3.6:
-    dependencies:
-      assertion-error: 1.1.0
-      check-error: 1.0.2
-      deep-eql: 3.0.1
-      get-func-name: 2.0.2
-      loupe: 2.3.1
-      pathval: 1.1.1
-      type-detect: 4.0.8
+  chai@6.2.2: {}
 
   chalk@4.1.2:
     dependencies:
       ansi-styles: 4.3.0
       supports-color: 7.2.0
 
-  check-error@1.0.2: {}
-
   chokidar@4.0.3:
     dependencies:
       readdirp: 4.1.2
@@ -1269,10 +1233,6 @@ snapshots:
 
   decamelize@4.0.0: {}
 
-  deep-eql@3.0.1:
-    dependencies:
-      type-detect: 4.0.8
-
   deep-is@0.1.4: {}
 
   delayed-stream@1.0.0: {}
@@ -1465,8 +1425,6 @@ snapshots:
 
   get-caller-file@2.0.5: {}
 
-  get-func-name@2.0.2: {}
-
   get-intrinsic@1.3.0:
     dependencies:
       call-bind-apply-helpers: 1.0.2
@@ -1628,10 +1586,6 @@ snapshots:
       chalk: 4.1.2
       is-unicode-supported: 0.1.0
 
-  loupe@2.3.1:
-    dependencies:
-      get-func-name: 2.0.2
-
   lru-cache@10.4.3: {}
 
   lru-cache@6.0.0:
@@ -1781,8 +1735,6 @@ snapshots:
 
   path-type@4.0.0: {}
 
-  pathval@1.1.1: {}
-
   picocolors@1.1.1: {}
 
   picomatch@2.3.1: {}
@@ -1942,8 +1894,6 @@ snapshots:
     dependencies:
       prelude-ls: 1.2.1
 
-  type-detect@4.0.8: {}
-
   type-fest@0.18.1: {}
 
   type-fest@0.21.3: {}