diff --git a/landing/package.json b/landing/package.json
index a46c0d43a..156dc73ff 100644
--- a/landing/package.json
+++ b/landing/package.json
@@ -13,7 +13,7 @@
   "dependencies": {
     "@astrojs/mdx": "^4.3.13",
     "@astrojs/vercel": "^9.0.2",
-    "@polar-sh/sdk": "^0.20.2",
+    "@polar-sh/sdk": "^0.43.0",
     "astro": "^5.17.1",
     "shepherd.js": "workspace:*"
   },
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 7e9fd8d8f..b6822ce60 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -100,8 +100,8 @@ importers:
         specifier: ^9.0.2
         version: 9.0.2(astro@5.17.1(@types/node@25.1.0)(@vercel/functions@2.2.13)(jiti@2.6.1)(lightningcss@1.30.2)(rollup@4.57.1)(terser@5.46.0)(typescript@5.9.3)(yaml@2.8.2))(encoding@0.1.13)(react@19.2.4)(rollup@4.57.1)(svelte@5.49.1)
       '@polar-sh/sdk':
-        specifier: ^0.20.2
-        version: 0.20.2(zod@3.25.76)
+        specifier: ^0.43.0
+        version: 0.43.0
       astro:
         specifier: ^5.17.1
         version: 5.17.1(@types/node@25.1.0)(@vercel/functions@2.2.13)(jiti@2.6.1)(lightningcss@1.30.2)(rollup@4.57.1)(terser@5.46.0)(typescript@5.9.3)(yaml@2.8.2)
@@ -1051,8 +1051,8 @@ packages:
     peerDependencies:
       '@csstools/css-tokenizer': ^4.0.0
 
-  '@csstools/css-syntax-patches-for-csstree@1.0.26':
-    resolution: {integrity: sha512-6boXK0KkzT5u5xOgF6TKB+CLq9SOpEGmkZw0g5n9/7yg85wab3UzSxB8TxhLJ31L4SGJ6BCFRw/iftTha1CJXA==}
+  '@csstools/css-syntax-patches-for-csstree@1.0.27':
+    resolution: {integrity: sha512-sxP33Jwg1bviSUXAV43cVYdmjt2TLnLXNqCWl9xmxHawWVjGz/kEbdkr7F9pxJNBN2Mh+dq0crgItbW6tQvyow==}
 
   '@csstools/css-tokenizer@4.0.0':
     resolution: {integrity: sha512-QxULHAm7cNu72w97JUNCBFODFaXpbDg+dP8b/oWFAZ2MTRppA3U00Y2L1HqaS4J6yBqxwa/Y3nMBaxVKbB/NsA==}
@@ -2057,10 +2057,8 @@ packages:
     resolution: {integrity: sha512-c83qWb22rNRuB0UaVCI0uRPNRr8Z0FWnEIvT47jiHAmOIUHbBOg5XvV7pM5x+rKn9HRpjxquDbXYSXr3fAKFcw==}
     engines: {node: '>=12'}
 
-  '@polar-sh/sdk@0.20.2':
-    resolution: {integrity: sha512-Rrqt2jyg1VhO9Gfy3WpLF9bST5yxXGnNJ1a/vHw/N4CXWZNbafKjKVGI2f7t1emCosvzkT2BpIBf+b19CpUTiw==}
-    peerDependencies:
-      zod: '>= 3'
+  '@polar-sh/sdk@0.43.0':
+    resolution: {integrity: sha512-LvbnPAo5h9wAOpq8sgzonip0PtzU2UZydqxUpWeOdHjaBWNgV36dPRY3oQA7XD4EzRsUJhVl3hVc6sp1GnTX8g==}
 
   '@polka/url@1.0.0-next.29':
     resolution: {integrity: sha512-wwQAWhWSuHaag8c4q/KN/vCoeOJYshAIvMQwD4GpSb3OiZklFfvAgmj0VCBBImRpuF/aFgIRzllXlVX93Jevww==}
@@ -4975,6 +4973,10 @@ packages:
     resolution: {integrity: sha512-vFrFJkWtJvJnD5hg+hJvVE8Lh/TcMzKnTgCWmtBipwI5yLX/iX+5UB2tfuyODF5E7k9xEzMdYgGqaSb1c0c5Yw==}
     engines: {node: 20 || >=22}
 
+  lru-cache@11.2.6:
+    resolution: {integrity: sha512-ESL2CrkS/2wTPfuend7Zhkzo2u0daGJ/A2VucJOgQ/C48S/zB8MMeMHSGKYpXhIjbPxfuezITkaBH1wqv00DDQ==}
+    engines: {node: 20 || >=22}
+
   lru-cache@5.1.1:
     resolution: {integrity: sha512-KpNARQA3Iwv+jTA0utUVVbrh+Jlrr1Fv0e56GGzAFOXN7dk/FviaDW8LHmK52DlcH4WP2n6gI8vN1aesBFgo9w==}
 
@@ -7835,6 +7837,9 @@ packages:
   zod@3.25.76:
     resolution: {integrity: sha512-gzUt/qt81nXsFGKIFcC3YnfEAx5NkunCfnDlvuBSSFS02bcXu4Lmea0AFIUwbLWxWPx3d9p8S5QoaujKcNQxcQ==}
 
+  zod@4.3.6:
+    resolution: {integrity: sha512-rftlrkhHZOcjDwkGlnUtZZkvaPHCsDATp4pGpuOOMDaTdDDXF91wuVDJoWoPsKX/3YPQ5fHuF3STjcYyKr+Qhg==}
+
   zwitch@2.0.4:
     resolution: {integrity: sha512-bXE4cR/kVZhKZX/RjPEflHaKVhUVl85noU3v6b8apfQEc1x4A+zBxjZ4lN8LqGd6WZ3dl98pY4o717VFmoPp+A==}
 
@@ -7874,7 +7879,7 @@ snapshots:
       '@csstools/css-color-parser': 4.0.1(@csstools/css-parser-algorithms@4.0.0(@csstools/css-tokenizer@4.0.0))(@csstools/css-tokenizer@4.0.0)
       '@csstools/css-parser-algorithms': 4.0.0(@csstools/css-tokenizer@4.0.0)
       '@csstools/css-tokenizer': 4.0.0
-      lru-cache: 11.2.5
+      lru-cache: 11.2.6
     optional: true
 
   '@asamuzakjp/dom-selector@6.7.8':
@@ -7883,7 +7888,7 @@ snapshots:
       bidi-js: 1.0.3
       css-tree: 3.1.0
       is-potential-custom-element-name: 1.0.1
-      lru-cache: 11.2.5
+      lru-cache: 11.2.6
     optional: true
 
   '@asamuzakjp/nwsapi@2.3.9':
@@ -9443,7 +9448,7 @@ snapshots:
       '@csstools/css-tokenizer': 4.0.0
     optional: true
 
-  '@csstools/css-syntax-patches-for-csstree@1.0.26':
+  '@csstools/css-syntax-patches-for-csstree@1.0.27':
     optional: true
 
   '@csstools/css-tokenizer@4.0.0':
@@ -10356,10 +10361,10 @@ snapshots:
       '@pnpm/network.ca-file': 1.0.2
       config-chain: 1.1.13
 
-  '@polar-sh/sdk@0.20.2(zod@3.25.76)':
+  '@polar-sh/sdk@0.43.0':
     dependencies:
       standardwebhooks: 1.0.0
-      zod: 3.25.76
+      zod: 4.3.6
 
   '@polka/url@1.0.0-next.29': {}
 
@@ -12091,9 +12096,9 @@ snapshots:
   cssstyle@5.3.7:
     dependencies:
       '@asamuzakjp/css-color': 4.1.2
-      '@csstools/css-syntax-patches-for-csstree': 1.0.26
+      '@csstools/css-syntax-patches-for-csstree': 1.0.27
       css-tree: 3.1.0
-      lru-cache: 11.2.5
+      lru-cache: 11.2.6
     optional: true
 
   csstype@3.2.3: {}
@@ -13761,6 +13766,9 @@ snapshots:
 
   lru-cache@11.2.5: {}
 
+  lru-cache@11.2.6:
+    optional: true
+
   lru-cache@5.1.1:
     dependencies:
       yallist: 3.1.1
@@ -17079,4 +17087,6 @@ snapshots:
 
   zod@3.25.76: {}
 
+  zod@4.3.6: {}
+
   zwitch@2.0.4: {}