diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index d080ac8d..dbb98cfd 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -85,8 +85,8 @@ catalogs:
       specifier: 5.2.8
       version: 5.2.8
     '@google-cloud/tasks':
-      specifier: 4.1.0
-      version: 4.1.0
+      specifier: 4.0.1
+      version: 4.0.1
     '@hono/mcp':
       specifier: 0.2.5
       version: 0.2.5
@@ -1416,7 +1416,7 @@ importers:
         version: 1.11.2
       '@google-cloud/tasks':
         specifier: 'catalog:'
-        version: 4.1.0
+        version: 4.0.1
       '@hookform/resolvers':
         specifier: 'catalog:'
         version: 5.2.2(react-hook-form@7.76.0(react@19.2.6))
@@ -1699,7 +1699,7 @@ importers:
     dependencies:
       '@google-cloud/tasks':
         specifier: 'catalog:'
-        version: 4.1.0
+        version: 4.0.1
       '@libsql/client':
         specifier: 'catalog:'
         version: 0.15.15
@@ -4493,9 +4493,9 @@ packages:
   '@formatjs/intl-localematcher@0.8.1':
     resolution: {integrity: sha512-xwEuwQFdtSq1UKtQnyTZWC+eHdv7Uygoa+H2k/9uzBVQjDyp9r20LNDNKedWXll7FssT3GRHvqsdJGYSUWqYFA==}
 
-  '@google-cloud/tasks@4.1.0':
-    resolution: {integrity: sha512-9n6Aw0JZS/c6dqP1wmK9tmzwqayS/E62BM1rOtzDhwYeWhtAhFsdXjCDZZ9+H+kGOrpsLf+4NPIs5lu5mQvapg==}
-    engines: {node: '>=v14'}
+  '@google-cloud/tasks@4.0.1':
+    resolution: {integrity: sha512-cluHSN52WgaNoDPVguxCeXZq4rTBHqJntXFB9aI9zG8n8MJukf6V0H7yoAXpKXQxyeXv4LRy108kAgLPgXP3yA==}
+    engines: {node: '>=14.0.0'}
 
   '@grpc/grpc-js@1.14.1':
     resolution: {integrity: sha512-sPxgEWtPUR3EnRJCEtbGZG2iX8LQDUls2wUS3o27jg07KqJFMq6YDeWvMo1wfpmy3rqRdS0rivpLwhqQtEyCuQ==}
@@ -14405,7 +14405,7 @@ snapshots:
       '@formatjs/fast-memoize': 3.1.0
       tslib: 2.8.1
 
-  '@google-cloud/tasks@4.1.0':
+  '@google-cloud/tasks@4.0.1':
     dependencies:
       google-gax: 4.6.1
     transitivePeerDependencies:
diff --git a/pnpm-workspace.yaml b/pnpm-workspace.yaml
index cf9f8d38..bd2eb377 100644
--- a/pnpm-workspace.yaml
+++ b/pnpm-workspace.yaml
@@ -51,7 +51,8 @@ catalog:
   "@dnd-kit/sortable": 10.0.0
   "@dnd-kit/utilities": 3.2.2
   "@fontsource-variable/inter": 5.2.8
-  "@google-cloud/tasks": 4.1.0
+  # Pinned to 4.0.1 — 4.1.0+ ships an ESM build that reads config JSON via fs.readFileSync, breaking `bun build --compile` in apps/workflows
+  "@google-cloud/tasks": 4.0.1
   "@hono/mcp": 0.2.5
   "@hono/sentry": 1.2.2
   "@hono/zod-openapi": 1.4.0