diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a726929..a8ea4b6 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -57,7 +57,7 @@ jobs:
       - name: Get GitHub OIDC Token
         if: github.repository == 'stainless-sdks/morphik-typescript'
         id: github-oidc
-        uses: actions/github-script@v6
+        uses: actions/github-script@v8
         with:
           script: core.setOutput('github_token', await core.getIDToken());
 
diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 4fcfdf7..2b6f978 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "1.9.0"
+  ".": "1.9.1"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5caaf1c..3872ed5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,21 @@
 # Changelog
 
+## 1.9.1 (2026-02-06)
+
+Full Changelog: [v1.9.0...v1.9.1](https://github.com/morphik-org/morphik-ts/compare/v1.9.0...v1.9.1)
+
+### Bug Fixes
+
+* **client:** avoid memory leak with abort signals ([d4ab61c](https://github.com/morphik-org/morphik-ts/commit/d4ab61c33f1d02a5253e27841bb775a6ceea147d))
+* **client:** avoid removing abort listener too early ([a4fdb09](https://github.com/morphik-org/morphik-ts/commit/a4fdb095674574af92643d5212923579b73f84cc))
+
+
+### Chores
+
+* **ci:** upgrade `actions/github-script` ([8513ce5](https://github.com/morphik-org/morphik-ts/commit/8513ce589bdffbd702a3cc9fa868ad499f216969))
+* **client:** do not parse responses with empty content-length ([3169d51](https://github.com/morphik-org/morphik-ts/commit/3169d51148b52561338eea977226341cfb7c0831))
+* **client:** restructure abort controller binding ([b48b2b0](https://github.com/morphik-org/morphik-ts/commit/b48b2b0502d295c9a0cb4955437caddccc995bea))
+
 ## 1.9.0 (2026-01-22)
 
 Full Changelog: [v1.8.0...v1.9.0](https://github.com/morphik-org/morphik-ts/compare/v1.8.0...v1.9.0)
diff --git a/package.json b/package.json
index 9e99c8b..9be4e39 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "morphik",
-  "version": "1.9.0",
+  "version": "1.9.1",
   "description": "The official TypeScript library for the Morphik API",
   "author": "Morphik <founders@morphik.ai>",
   "types": "dist/index.d.ts",
diff --git a/src/client.ts b/src/client.ts
index 2cc8776..c093e2e 100644
--- a/src/client.ts
+++ b/src/client.ts
@@ -575,9 +575,10 @@ export class Morphik {
     controller: AbortController,
   ): Promise<Response> {
     const { signal, method, ...options } = init || {};
-    if (signal) signal.addEventListener('abort', () => controller.abort());
+    const abort = this._makeAbort(controller);
+    if (signal) signal.addEventListener('abort', abort, { once: true });
 
-    const timeout = setTimeout(() => controller.abort(), ms);
+    const timeout = setTimeout(abort, ms);
 
     const isReadableBody =
       ((globalThis as any).ReadableStream && options.body instanceof (globalThis as any).ReadableStream) ||
@@ -744,6 +745,12 @@ export class Morphik {
     return headers.values;
   }
 
+  private _makeAbort(controller: AbortController) {
+    // note: we can't just inline this method inside `fetchWithTimeout()` because then the closure
+    //       would capture all request options, and cause a memory leak.
+    return () => controller.abort();
+  }
+
   private buildBody({ options: { body, headers: rawHeaders } }: { options: FinalRequestOptions }): {
     bodyHeaders: HeadersLike;
     body: BodyInit | undefined;
diff --git a/src/internal/parse.ts b/src/internal/parse.ts
index 7d779e9..c669569 100644
--- a/src/internal/parse.ts
+++ b/src/internal/parse.ts
@@ -29,6 +29,12 @@ export async function defaultParseResponse<T>(client: Morphik, props: APIRespons
     const mediaType = contentType?.split(';')[0]?.trim();
     const isJSON = mediaType?.includes('application/json') || mediaType?.endsWith('+json');
     if (isJSON) {
+      const contentLength = response.headers.get('content-length');
+      if (contentLength === '0') {
+        // if there is no content we can't do anything
+        return undefined as T;
+      }
+
       const json = await response.json();
       return json as T;
     }
diff --git a/src/version.ts b/src/version.ts
index d6d803f..96219a4 100644
--- a/src/version.ts
+++ b/src/version.ts
@@ -1 +1 @@
-export const VERSION = '1.9.0'; // x-release-please-version
+export const VERSION = '1.9.1'; // x-release-please-version