diff --git a/README.md b/README.md
index ab3040b..974693b 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,8 @@ Fixes for package bugs waiting on upstream merges.
 | Package | Version | Format | Fix | PR |
 | :--- | :--- | :--- | :--- | :--- |
 | [`@expo/ui`](packages/@expo/ui/) | `56.0.0-canary-20260212-4f61309` | Bun | Missing `capsule` + `ellipse` shapes in `clipShape`/`mask`, broken `foregroundStyle` hierarchical handling | [expo/expo#43158](https://github.com/expo/expo/pull/43158) |
-| [`@convex-dev/better-auth`](packages/@convex-dev/better-auth/) | `0.10.10` | patch-package | Cookie expiry string comparison, null session cache, wrong `isAuthenticated` check | [get-convex/better-auth#218](https://github.com/get-convex/better-auth/pull/218) |
+| [`@convex-dev/better-auth`](packages/@convex-dev/better-auth/) | `0.10.10` | patch-package, Bun | Cookie expiry string comparison, null session cache, wrong `isAuthenticated` check | [get-convex/better-auth#218](https://github.com/get-convex/better-auth/pull/218) |
+| [`@convex-dev/better-auth`](packages/@convex-dev/better-auth/) | `0.10.10` | Bun, patch-package | Pinned `better-auth` peer dep `1.4.9` blocks newer 1.4.x versions | [get-convex/better-auth#245](https://github.com/get-convex/better-auth/pull/245) |
 | [`@tobilu/qmd`](packages/@tobilu/qmd/) | `1.0.6` | patch-package, Bun | `typescript` in `peerDependencies` instead of `devDependencies`, missing `tsc` in `prepare` script | [tobi/qmd#197](https://github.com/tobi/qmd/pull/197) |
 | [`bun`](packages/oven-sh/bun/) | `1.3.9` | Bun | `includePrerelease` semantics for peer dep semver validation | [oven-sh/bun#27085](https://github.com/oven-sh/bun/pull/27085) |
 | [`bun`](packages/oven-sh/bun/) | `1.3.9` | Bun | Invalid YAML sequence in `update-root-certs` workflow `labels` field | [oven-sh/bun#27086](https://github.com/oven-sh/bun/pull/27086) |
diff --git a/packages/@convex-dev/better-auth/bun/@convex-dev%2Fbetter-auth@0.10.10-pr218.patch b/packages/@convex-dev/better-auth/bun/@convex-dev%2Fbetter-auth@0.10.10-pr218.patch
new file mode 100644
index 0000000..2d62ebd
--- /dev/null
+++ b/packages/@convex-dev/better-auth/bun/@convex-dev%2Fbetter-auth@0.10.10-pr218.patch
@@ -0,0 +1,61 @@
+diff --git a/dist/plugins/cross-domain/client.js b/dist/plugins/cross-domain/client.js
+index ae0c621..f702b32 100644
+--- a/dist/plugins/cross-domain/client.js
++++ b/dist/plugins/cross-domain/client.js
+@@ -26,7 +26,7 @@ export function getSetCookie(header, prevCookie) {
+                 : null;
+         toSetCookie[key] = {
+             value: cookie["value"],
+-            expires,
++            expires: expires ? expires.toISOString() : null,
+         };
+     });
+     if (prevCookie) {
+@@ -52,7 +52,7 @@ export function getCookie(cookie) {
+         // noop
+     }
+     const toSend = Object.entries(parsed).reduce((acc, [key, value]) => {
+-        if (value.expires && value.expires < new Date()) {
++        if (value.expires && new Date(value.expires) < new Date()) {
+             return acc;
+         }
+         return `${acc}; ${key}=${value.value}`;
+@@ -113,7 +113,14 @@ export const crossDomainClient = (opts = {}) => {
+                  */
+                 getSessionData: () => {
+                     const sessionData = storage?.getItem(localCacheName);
+-                    return sessionData ? JSON.parse(sessionData) : null;
++                    if (!sessionData) return null;
++                    try {
++                        const parsed = JSON.parse(sessionData);
++                        if (parsed && typeof parsed === "object" && Object.keys(parsed).length === 0) return null;
++                        return parsed;
++                    } catch {
++                        return null;
++                    }
+                 },
+             };
+         },
+@@ -140,6 +147,9 @@ export const crossDomainClient = (opts = {}) => {
+                             !opts?.disableCache) {
+                             const data = context.data;
+                             storage.setItem(localCacheName, JSON.stringify(data));
++                            if (data === null) {
++                                storage.setItem(cookieName, "{}");
++                            }
+                         }
+                     },
+                 },
+diff --git a/dist/react/index.js b/dist/react/index.js
+index eb292f6..235eef4 100644
+--- a/dist/react/index.js
++++ b/dist/react/index.js
+@@ -73,7 +73,7 @@ function useUseAuthFromBetterAuth(authClient, initialToken) {
+         [sessionId]);
+         return useMemo(() => ({
+             isLoading: isSessionPending,
+-            isAuthenticated: session !== null,
++            isAuthenticated: Boolean(session?.session),
+             fetchAccessToken,
+         }), 
+         // eslint-disable-next-line react-hooks/exhaustive-deps
diff --git a/packages/@convex-dev/better-auth/bun/@convex-dev%2Fbetter-auth@0.10.10-pr245.patch b/packages/@convex-dev/better-auth/bun/@convex-dev%2Fbetter-auth@0.10.10-pr245.patch
new file mode 100644
index 0000000..1cf9d6a
--- /dev/null
+++ b/packages/@convex-dev/better-auth/bun/@convex-dev%2Fbetter-auth@0.10.10-pr245.patch
@@ -0,0 +1,13 @@
+diff --git a/package.json b/package.json
+index fcff31a..c857a14 100644
+--- a/package.json
++++ b/package.json
+@@ -103,7 +103,7 @@
+     }
+   },
+   "peerDependencies": {
+-    "better-auth": "1.4.9",
++    "better-auth": ">=1.4.9 <1.5.0",
+     "convex": "^1.25.0",
+     "react": "^18.3.1 || ^19.0.0",
+     "react-dom": "^18.3.1 || ^19.0.0"
diff --git a/packages/@convex-dev/better-auth/npm/@convex-dev+better-auth+0.10.10.patch b/packages/@convex-dev/better-auth/npm/@convex-dev+better-auth+0.10.10-pr218.patch
similarity index 61%
rename from packages/@convex-dev/better-auth/npm/@convex-dev+better-auth+0.10.10.patch
rename to packages/@convex-dev/better-auth/npm/@convex-dev+better-auth+0.10.10-pr218.patch
index e6dc7dc..7461505 100644
--- a/packages/@convex-dev/better-auth/npm/@convex-dev+better-auth+0.10.10.patch
+++ b/packages/@convex-dev/better-auth/npm/@convex-dev+better-auth+0.10.10-pr218.patch
@@ -1,7 +1,16 @@
 diff --git a/node_modules/@convex-dev/better-auth/dist/plugins/cross-domain/client.js b/node_modules/@convex-dev/better-auth/dist/plugins/cross-domain/client.js
-index ae0c621..b2d0788 100644
+index ae0c621..f702b32 100644
 --- a/node_modules/@convex-dev/better-auth/dist/plugins/cross-domain/client.js
 +++ b/node_modules/@convex-dev/better-auth/dist/plugins/cross-domain/client.js
+@@ -26,7 +26,7 @@ export function getSetCookie(header, prevCookie) {
+                 : null;
+         toSetCookie[key] = {
+             value: cookie["value"],
+-            expires,
++            expires: expires ? expires.toISOString() : null,
+         };
+     });
+     if (prevCookie) {
 @@ -52,7 +52,7 @@ export function getCookie(cookie) {
          // noop
      }
@@ -11,7 +20,23 @@ index ae0c621..b2d0788 100644
              return acc;
          }
          return `${acc}; ${key}=${value.value}`;
-@@ -140,6 +140,9 @@ export const crossDomainClient = (opts = {}) => {
+@@ -113,7 +113,14 @@ export const crossDomainClient = (opts = {}) => {
+                  */
+                 getSessionData: () => {
+                     const sessionData = storage?.getItem(localCacheName);
+-                    return sessionData ? JSON.parse(sessionData) : null;
++                    if (!sessionData) return null;
++                    try {
++                        const parsed = JSON.parse(sessionData);
++                        if (parsed && typeof parsed === "object" && Object.keys(parsed).length === 0) return null;
++                        return parsed;
++                    } catch {
++                        return null;
++                    }
+                 },
+             };
+         },
+@@ -140,6 +147,9 @@ export const crossDomainClient = (opts = {}) => {
                              !opts?.disableCache) {
                              const data = context.data;
                              storage.setItem(localCacheName, JSON.stringify(data));
@@ -21,15 +46,6 @@ index ae0c621..b2d0788 100644
                          }
                      },
                  },
-@@ -165,7 +168,7 @@ export const crossDomainClient = (opts = {}) => {
-                             error: null,
-                             isPending: false,
-                         });
--                        storage.setItem(localCacheName, "{}");
-+                        storage.setItem(localCacheName, "null");
-                     }
-                     return {
-                         url,
 diff --git a/node_modules/@convex-dev/better-auth/dist/react/index.js b/node_modules/@convex-dev/better-auth/dist/react/index.js
 index eb292f6..235eef4 100644
 --- a/node_modules/@convex-dev/better-auth/dist/react/index.js
diff --git a/packages/@convex-dev/better-auth/npm/@convex-dev+better-auth+0.10.10-pr245.patch b/packages/@convex-dev/better-auth/npm/@convex-dev+better-auth+0.10.10-pr245.patch
new file mode 100644
index 0000000..e50cd01
--- /dev/null
+++ b/packages/@convex-dev/better-auth/npm/@convex-dev+better-auth+0.10.10-pr245.patch
@@ -0,0 +1,13 @@
+diff --git a/node_modules/@convex-dev/better-auth/package.json b/node_modules/@convex-dev/better-auth/package.json
+index fcff31a..c857a14 100644
+--- a/node_modules/@convex-dev/better-auth/package.json
++++ b/node_modules/@convex-dev/better-auth/package.json
+@@ -103,7 +103,7 @@
+     }
+   },
+   "peerDependencies": {
+-    "better-auth": "1.4.9",
++    "better-auth": ">=1.4.9 <1.5.0",
+     "convex": "^1.25.0",
+     "react": "^18.3.1 || ^19.0.0",
+     "react-dom": "^18.3.1 || ^19.0.0"