diff --git a/WORKSPACE b/WORKSPACE
index 1ff2c9395e6..eba507c0736 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -103,7 +103,7 @@ npm_translate_lock(
     ],
     npmrc = "//:.npmrc",
     pnpm_lock = "//:pnpm-lock.yaml",
-    pnpm_version = "10.12.1",
+    pnpm_version = "9.15.9",
     verify_node_modules_ignored = "//:.bazelignore",
 )
 
diff --git a/package.json b/package.json
index 711ee2e81b8..9a3adf9498f 100644
--- a/package.json
+++ b/package.json
@@ -6,11 +6,11 @@
   "homepage": "https://github.com/angular/angular",
   "bugs": "https://github.com/angular/angular/issues",
   "license": "MIT",
-  "packageManager": "pnpm@10.14.0",
+  "packageManager": "pnpm@9.15.9",
   "engines": {
     "npm": "Please use pnpm instead of NPM to install dependencies",
     "yarn": "Please use pnpm instead of Yarn to install dependencies",
-    "pnpm": "10.14.0"
+    "pnpm": "9.15.9"
   },
   "repository": {
     "type": "git",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 11cf4bd740c..fa28f3aace7 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -8,13 +8,13 @@ overrides:
   https-proxy-agent: 7.0.6
   saucelabs: 9.0.2
 
-packageExtensionsChecksum: sha256-3L73Fw32UVtE6x5BJxJPBtQtH/mgsr31grNpdhHP1IY=
+packageExtensionsChecksum: d67b1f07b351844d00c57cbace376860
 
-pnpmfileChecksum: sha256-QGW233ToKgWoLMzbCDaHK5j+CWnAvigCWTWFnyw33Yo=
+pnpmfileChecksum: rjgmkqjvyw7tpsl5ar4eymowxa
 
 patchedDependencies:
   dagre-d3-es@7.0.11:
-    hash: 08ae1f30d46402ef53e1486454faa875683cf4152a8aab71ac255078ebfaccdd
+    hash: dp4f5qlzqey4wb2gylte6hyt4q
     path: tools/pnpm-patches/dagre-d3-es+7.0.11.patch
 
 importers:
@@ -203,7 +203,7 @@ importers:
         version: 7.9.0
       dagre-d3-es:
         specifier: ^7.0.11
-        version: 7.0.11(patch_hash=08ae1f30d46402ef53e1486454faa875683cf4152a8aab71ac255078ebfaccdd)
+        version: 7.0.11(patch_hash=dp4f5qlzqey4wb2gylte6hyt4q)
       diff:
         specifier: ^8.0.0
         version: 8.0.2
@@ -8785,6 +8785,7 @@ packages:
     engines: {node: '>=0.6.0', teleport: '>=0.2.0'}
     deprecated: |-
       You or someone you depend on is using Q, the JavaScript Promise library that gave JavaScript developers strong feelings about promises. They can almost certainly migrate to the native JavaScript promise now. Thank you literally everyone for joining me in this bet against the odds. Be excellent to each other.
+
       (For a CapTP with native promises, see @endo/eventual-send and @endo/captp)
 
   qjobs@1.2.0:
@@ -16057,7 +16058,7 @@ snapshots:
       d3-transition: 3.0.1(d3-selection@3.0.0)
       d3-zoom: 3.0.0
 
-  dagre-d3-es@7.0.11(patch_hash=08ae1f30d46402ef53e1486454faa875683cf4152a8aab71ac255078ebfaccdd):
+  dagre-d3-es@7.0.11(patch_hash=dp4f5qlzqey4wb2gylte6hyt4q):
     dependencies:
       d3: 7.9.0
       lodash-es: 4.17.21
@@ -18962,7 +18963,7 @@ snapshots:
       cytoscape-fcose: 2.2.0(cytoscape@3.33.0)
       d3: 7.9.0
       d3-sankey: 0.12.3
-      dagre-d3-es: 7.0.11(patch_hash=08ae1f30d46402ef53e1486454faa875683cf4152a8aab71ac255078ebfaccdd)
+      dagre-d3-es: 7.0.11(patch_hash=dp4f5qlzqey4wb2gylte6hyt4q)
       dayjs: 1.11.13
       dompurify: 3.2.6
       katex: 0.16.22