diff --git a/taskcluster/docker/index-task/Dockerfile b/taskcluster/docker/index-task/Dockerfile
index c8aac05e2..4f6c073c3 100644
--- a/taskcluster/docker/index-task/Dockerfile
+++ b/taskcluster/docker/index-task/Dockerfile
@@ -1,4 +1,4 @@
-FROM node:24-alpine@sha256:8a32c8cf649a49915a66e81e7a609223c708d0adabf288ee3f4077d765542f85
+FROM node:26-alpine@sha256:8996bb5821d62a8fd9bb27c1cb07462f3fdce6e47d640c6a881ead0b064ce216
 
 ENV       NODE_ENV        production
 RUN       mkdir /app
@@ -6,6 +6,9 @@ ADD       insert-indexes.js   /app/
 ADD       package.json        /app/
 ADD       yarn.lock           /app/
 WORKDIR   /app
-RUN       yarn --frozen-lockfile && yarn cache clean
+RUN       apk add --no-cache yarn && \
+          yarn --frozen-lockfile && \
+          yarn cache clean && \
+          apk del yarn
 
 ENTRYPOINT ["node"]
diff --git a/taskcluster/docker/index-task/package.json b/taskcluster/docker/index-task/package.json
index 443ef56ca..bf4fb4b3a 100644
--- a/taskcluster/docker/index-task/package.json
+++ b/taskcluster/docker/index-task/package.json
@@ -5,9 +5,9 @@
     "start": "node index.js"
   },
   "dependencies": {
-    "@taskcluster/client": "114.0.0"
+    "@taskcluster/client": "115.0.1"
   },
   "engines": {
-    "node": "^24"
+    "node": "^26"
   }
 }
diff --git a/taskcluster/docker/index-task/yarn.lock b/taskcluster/docker/index-task/yarn.lock
index 04d1b3e00..406080d17 100644
--- a/taskcluster/docker/index-task/yarn.lock
+++ b/taskcluster/docker/index-task/yarn.lock
@@ -43,16 +43,16 @@
   resolved "https://registry.yarnpkg.com/@sindresorhus/is/-/is-8.1.0.tgz#00d7b9dc92664550fe933cdcfaa8665bc4111202"
   integrity sha512-2SX/1jW6CIMAiebvVv5ZInoCEuWQmMyBoJXXGC6Vjakjp/fpxP5eHs7/V6WKuPEIbuK06+VpjH+vjLQhr98rDQ==
 
-"@taskcluster/client@114.0.0":
-  version "114.0.0"
-  resolved "https://registry.yarnpkg.com/@taskcluster/client/-/client-114.0.0.tgz#b6b90791b01188f6144472859a5ee2f240e04ea5"
-  integrity sha512-o4i56pa00B90GYfQ6B/jDBmPmSm+nRYKeW+NYEbxOiTlnhL+sPO7GH9bp6viUXIRHqbv916FzD9ggLi4IrnbrQ==
+"@taskcluster/client@115.0.1":
+  version "115.0.1"
+  resolved "https://registry.yarnpkg.com/@taskcluster/client/-/client-115.0.1.tgz#857ff13fd1045827dd029b79c92d361fbfaf892b"
+  integrity sha512-/ViqlfD3WFL/R1ZNQ9zsjzifimsDlUtX6k2cSlbRdLtJu4i/LNZv/n++ZhnGmyswnEbqYru4iAmF/s+lzAuWpg==
   dependencies:
     debug "^4.1.1"
     got "^16.0.0"
     hawk "^9.0.1"
     lodash "^4.17.4"
-    slugid "^5.0.1"
+    slugid "^6.0.0"
     taskcluster-lib-urls "^13.0.0"
 
 "@types/http-cache-semantics@^4.2.0":
@@ -185,12 +185,12 @@ responselike@^4.0.2:
   dependencies:
     lowercase-keys "^3.0.0"
 
-slugid@^5.0.1:
-  version "5.0.1"
-  resolved "https://registry.yarnpkg.com/slugid/-/slugid-5.0.1.tgz#850c1834de6c2f3e4614836a30c38287e2244457"
-  integrity sha512-T1QJB+kML/DmjdrX+RjeowCzvbjfwzJEw6bam1ft+yUv+h9/RwAfMpoXqCjxuItrGN7CgtYW/0tMp+UEIZmx4Q==
+slugid@^6.0.0:
+  version "6.0.0"
+  resolved "https://registry.yarnpkg.com/slugid/-/slugid-6.0.0.tgz#05515e5cb243f9ecd1300033f070282fe4cdb346"
+  integrity sha512-lcFf9zUXRbdTOVb142GGjd/QoIvFiIS/uFsep11gqz/sQcDpCh2+pCfmB5FlFXDeNHHY3O/b5/qV8VaXIuLhyA==
   dependencies:
-    uuid "^9.0.0"
+    uuid "^14.0.3"
 
 tagged-tag@^1.0.0:
   version "1.0.0"
@@ -214,7 +214,7 @@ uint8array-extras@^1.6.0:
   resolved "https://registry.yarnpkg.com/uint8array-extras/-/uint8array-extras-1.6.0.tgz#ab895526255bddd698e75a02992ee73f1b112ebe"
   integrity sha512-8iAasVS4wUx0gPLjH8Xtz2PeDzTSiy8QiLGu2DT3X5GU+egFEQhpnbtkehbAwjvDcxIERmCYcysiODFmE3Ud0Q==
 
-uuid@^9.0.0:
-  version "9.0.1"
-  resolved "https://registry.yarnpkg.com/uuid/-/uuid-9.0.1.tgz#e188d4c8853cc722220392c424cd637f32293f30"
-  integrity sha512-b+1eJOlsR9K8HJpow9Ok3fiWOWSIcIzXodvv0rQjVoOVNpWMpxf1wZNpt4y9h10odCNrqnYp1OBzRktckBe3sA==
+uuid@^14.0.3:
+  version "14.0.3"
+  resolved "https://registry.yarnpkg.com/uuid/-/uuid-14.0.3.tgz#48c9b0dcf5a42d983c23162399eeb9af8b2cc617"
+  integrity sha512-Sc5u1VVln93y1Xnz4R+CunOZc7R9LUcTmhj7Rc7Eg3HVcf7rVn2FOoa812fe0W8p3jD7xeoGSYbfqCGGH2B6xw==