diff --git a/package.json b/package.json
index c7543cf123..1f66701dd3 100644
--- a/package.json
+++ b/package.json
@@ -138,13 +138,13 @@
     "@sveltejs/adapter-vercel": "^4.0.0",
     "@sveltejs/kit": "^2.20.2",
     "@sveltejs/vite-plugin-svelte": "^5.0.3",
-    "@temporalio/activity": "1.11.8",
-    "@temporalio/client": "1.11.8",
-    "@temporalio/common": "1.11.8",
-    "@temporalio/proto": "1.11.8",
-    "@temporalio/testing": "1.11.8",
-    "@temporalio/worker": "1.11.8",
-    "@temporalio/workflow": "1.11.8",
+    "@temporalio/activity": "1.12.1",
+    "@temporalio/client": "1.12.1",
+    "@temporalio/common": "1.12.1",
+    "@temporalio/proto": "1.12.1",
+    "@temporalio/testing": "1.12.1",
+    "@temporalio/worker": "1.12.1",
+    "@temporalio/workflow": "1.12.1",
     "@types/base-64": "^1.0.0",
     "@types/cors": "^2.8.13",
     "@types/express": "^4.17.17",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index b59756df09..4dd57fb98f 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -185,26 +185,26 @@ devDependencies:
     specifier: ^5.0.3
     version: 5.0.3(svelte@5.25.5)(vite@6.2.7)
   '@temporalio/activity':
-    specifier: 1.11.8
-    version: 1.11.8
+    specifier: 1.12.1
+    version: 1.12.1
   '@temporalio/client':
-    specifier: 1.11.8
-    version: 1.11.8
+    specifier: 1.12.1
+    version: 1.12.1
   '@temporalio/common':
-    specifier: 1.11.8
-    version: 1.11.8
+    specifier: 1.12.1
+    version: 1.12.1
   '@temporalio/proto':
-    specifier: 1.11.8
-    version: 1.11.8
+    specifier: 1.12.1
+    version: 1.12.1
   '@temporalio/testing':
-    specifier: 1.11.8
-    version: 1.11.8(esbuild@0.25.0)
+    specifier: 1.12.1
+    version: 1.12.1(esbuild@0.25.0)
   '@temporalio/worker':
-    specifier: 1.11.8
-    version: 1.11.8(esbuild@0.25.0)
+    specifier: 1.12.1
+    version: 1.12.1(esbuild@0.25.0)
   '@temporalio/workflow':
-    specifier: 1.11.8
-    version: 1.11.8
+    specifier: 1.12.1
+    version: 1.12.1
   '@types/base-64':
     specifier: ^1.0.0
     version: 1.0.2
@@ -2079,6 +2079,14 @@ packages:
       '@js-sdsl/ordered-map': 4.4.2
     dev: true
 
+  /@grpc/grpc-js@1.13.4:
+    resolution: {integrity: sha512-GsFaMXCkMqkKIvwCQjCrwH+GHbPKBjhwo/8ZuUkWHqbI73Kky9I+pQltrlT0+MWpedCoosda53lgjYfyEPgxBg==}
+    engines: {node: '>=12.10.0'}
+    dependencies:
+      '@grpc/proto-loader': 0.7.13
+      '@js-sdsl/ordered-map': 4.4.2
+    dev: true
+
   /@grpc/proto-loader@0.7.13:
     resolution: {integrity: sha512-AiXO/bfe9bmxBjxxtYxFAXGZvMaN5s8kO+jBHAJCON8rJoB5YS/D6X7ZNc6XQkuHNmyl4CYaMI1fJ/Gn27RGGw==}
     engines: {node: '>=6'}
@@ -3495,60 +3503,67 @@ packages:
       '@swc/counter': 0.1.3
     dev: true
 
-  /@temporalio/activity@1.11.8:
-    resolution: {integrity: sha512-XWjj/EL0YiKsnh0W4W5kBm+Xp1jhpUEaQMGA25+BxKEYBn8qJ+mLQOwuqWn6punS9a6bvnT7P/pUlnhjPxH6KQ==}
+  /@temporalio/activity@1.12.1:
+    resolution: {integrity: sha512-EPPIR5J0A6OxWTr5HGyeM2Lwh3US8S73N3ZFelCPaJwOq2Fh7qrLiwYp2wCwGYhhYI9Xppo3xE45MWUxayBa3Q==}
+    engines: {node: '>= 18.0.0'}
     dependencies:
-      '@temporalio/common': 1.11.8
+      '@temporalio/common': 1.12.1
       abort-controller: 3.0.0
     dev: true
 
-  /@temporalio/client@1.11.8:
-    resolution: {integrity: sha512-UpiU+awykWYjQSSJH5NLY5Id/uDdiD9yz5oaardv1YF80rMN7U1Q6W9lgPEbg/b62qOv3Mia1+fE5hrav7ying==}
+  /@temporalio/client@1.12.1:
+    resolution: {integrity: sha512-m89isGb6I4BBeCbhkvXbpjeRZZUa3E2R06J/I+t2JWgv0Tg+PoNPusvU9UBd6LN7f7AetsQvAZKU6eQHyWxSEA==}
+    engines: {node: '>= 18.0.0'}
     dependencies:
-      '@grpc/grpc-js': 1.10.9
-      '@temporalio/common': 1.11.8
-      '@temporalio/proto': 1.11.8
+      '@grpc/grpc-js': 1.13.4
+      '@temporalio/common': 1.12.1
+      '@temporalio/proto': 1.12.1
       abort-controller: 3.0.0
       long: 5.2.3
       uuid: 9.0.1
     dev: true
 
-  /@temporalio/common@1.11.8:
-    resolution: {integrity: sha512-hB+TSB/P2Vm8chYyZGcKALdywGvcBSqzSUzFG1lOm/JPDh2d4uK6lvE2S8OneEndlJSdzE++d2Mt5B+iKe2ytA==}
+  /@temporalio/common@1.12.1:
+    resolution: {integrity: sha512-gMVNYh49qGNFPKN22BPXtQlgvcD8rxUoP0QO0ePeaz9TyHG6+3TURGhc8xybJA7zHnpfW8TH8XHMWJIMzCPxtg==}
+    engines: {node: '>= 18.0.0'}
     dependencies:
-      '@temporalio/proto': 1.11.8
+      '@temporalio/proto': 1.12.1
       long: 5.2.3
       ms: 3.0.0-canary.1
       proto3-json-serializer: 2.0.1
     dev: true
 
-  /@temporalio/core-bridge@1.11.8:
-    resolution: {integrity: sha512-s1EkihwUHGIOylF31UFnsnntZmVqcKEgVTu8UvAf/J/br4jhs+nEO/mBFexqrzSWnraJhpq9UnzTNAklNHFVKg==}
+  /@temporalio/core-bridge@1.12.1:
+    resolution: {integrity: sha512-JOLavcVhzLf4QDK7S/SAZjTbbtiYRoZoJCvJsl6T9s6MJFyeT1ih+4jeAN3UUmhLvaP++sqEuFSfRVJ0ZFoFNA==}
+    engines: {node: '>= 18.0.0'}
     requiresBuild: true
     dependencies:
-      '@temporalio/common': 1.11.8
+      '@grpc/grpc-js': 1.13.4
+      '@temporalio/common': 1.12.1
       arg: 5.0.2
       cargo-cp-artifact: 0.1.8
       which: 4.0.0
     dev: true
 
-  /@temporalio/proto@1.11.8:
-    resolution: {integrity: sha512-L6QsIAq3PrnQpARAcqLCe4xMpbkpBEvA/9FQGddpzCESvViUOUAIHPwckL1DokYPedEAt19C+uuBGVBMCNx7vw==}
+  /@temporalio/proto@1.12.1:
+    resolution: {integrity: sha512-hW5jvxBuoKdh3CwbGT/AQoPMFoGG8xcPcHRMCTta/HZGFHRDibbr0aDfPS6ke7oYtcpWF0A8d6jRAHEXyPUvUQ==}
+    engines: {node: '>= 18.0.0'}
     dependencies:
       long: 5.2.3
       protobufjs: 7.2.5
     dev: true
 
-  /@temporalio/testing@1.11.8(esbuild@0.25.0):
-    resolution: {integrity: sha512-FC6A2YFDH6CDp7eeZ9aW9RDSzGxQqH6Old5UxBvIk5ZFgsCMOltpWqYMTIrv9EQbe6xMOTgPjP/6XgAqvIPj/g==}
+  /@temporalio/testing@1.12.1(esbuild@0.25.0):
+    resolution: {integrity: sha512-vg6NfqoF5xHw/L3eswBqCA3cxqHEePEj2kPxNkxMrEaNAqjHx/1HNkmazRFjC3kN/L1hHRj/ERLcF8zGIOeiwA==}
+    engines: {node: '>= 18.0.0'}
     dependencies:
-      '@temporalio/activity': 1.11.8
-      '@temporalio/client': 1.11.8
-      '@temporalio/common': 1.11.8
-      '@temporalio/core-bridge': 1.11.8
-      '@temporalio/proto': 1.11.8
-      '@temporalio/worker': 1.11.8(esbuild@0.25.0)
-      '@temporalio/workflow': 1.11.8
+      '@temporalio/activity': 1.12.1
+      '@temporalio/client': 1.12.1
+      '@temporalio/common': 1.12.1
+      '@temporalio/core-bridge': 1.12.1
+      '@temporalio/proto': 1.12.1
+      '@temporalio/worker': 1.12.1(esbuild@0.25.0)
+      '@temporalio/workflow': 1.12.1
       abort-controller: 3.0.0
     transitivePeerDependencies:
       - '@swc/helpers'
@@ -3557,20 +3572,22 @@ packages:
       - webpack-cli
     dev: true
 
-  /@temporalio/worker@1.11.8(esbuild@0.25.0):
-    resolution: {integrity: sha512-KNUEw8khhFoVLhOy93j9EkA6KfKtOVn7N7+c4kn9AM7QXkcxe73+1AUwNKgFYKZph4i6I26NBxs7MPrgh3GKxQ==}
-    engines: {node: '>= 16.0.0'}
+  /@temporalio/worker@1.12.1(esbuild@0.25.0):
+    resolution: {integrity: sha512-jI3UxPAVbuM2MJO0c27iNV59KNHgAlx6yoJOpcE+jdGAmoN52MHdSt3qedrWtWINgZDbZg9dPC8KoDbXr9kP6g==}
+    engines: {node: '>= 18.0.0'}
     dependencies:
+      '@grpc/grpc-js': 1.13.4
       '@swc/core': 1.10.7
-      '@temporalio/activity': 1.11.8
-      '@temporalio/client': 1.11.8
-      '@temporalio/common': 1.11.8
-      '@temporalio/core-bridge': 1.11.8
-      '@temporalio/proto': 1.11.8
-      '@temporalio/workflow': 1.11.8
+      '@temporalio/activity': 1.12.1
+      '@temporalio/client': 1.12.1
+      '@temporalio/common': 1.12.1
+      '@temporalio/core-bridge': 1.12.1
+      '@temporalio/proto': 1.12.1
+      '@temporalio/workflow': 1.12.1
       abort-controller: 3.0.0
       heap-js: 2.3.0
       memfs: 4.7.7
+      protobufjs: 7.2.5
       rxjs: 7.8.1
       source-map: 0.7.4
       source-map-loader: 4.0.2(webpack@5.94.0)
@@ -3585,11 +3602,12 @@ packages:
       - webpack-cli
     dev: true
 
-  /@temporalio/workflow@1.11.8:
-    resolution: {integrity: sha512-gJy5Rr4WQCejdWskluHY/C20om0Yvx7/cLl9KHCweTyDLRfTu2VtMJRS8LPFQkKzoHBbLaqzPo2XdHh/u4JQoA==}
+  /@temporalio/workflow@1.12.1:
+    resolution: {integrity: sha512-r2d2tzEf6zJENewZMku1ge53QO52ZTN8bJXp8zzerPYyMx9Iqhg3Ck1ckrdpxpDw9gxBYZsRbwS2vpiq53ZKRQ==}
+    engines: {node: '>= 18.0.0'}
     dependencies:
-      '@temporalio/common': 1.11.8
-      '@temporalio/proto': 1.11.8
+      '@temporalio/common': 1.12.1
+      '@temporalio/proto': 1.12.1
     dev: true
 
   /@testing-library/dom@10.4.0:
diff --git a/src/lib/components/event/event-card.svelte b/src/lib/components/event/event-card.svelte
index fa6fac3829..4f5c53f0ca 100644
--- a/src/lib/components/event/event-card.svelte
+++ b/src/lib/components/event/event-card.svelte
@@ -6,9 +6,9 @@
   import Link from '$lib/holocene/link.svelte';
   import { translate } from '$lib/i18n/translate';
   import { relativeTime, timeFormat } from '$lib/stores/time-format';
+  import type { EventLink as ELink } from '$lib/types';
   import { type Payload } from '$lib/types';
   import type { WorkflowEvent } from '$lib/types/events';
-  import type { EventLink as ELink } from '$lib/types/events';
   import { getEventLinkHref } from '$lib/utilities/event-link-href';
   import {
     format,
diff --git a/src/lib/components/event/event-link.svelte b/src/lib/components/event/event-link.svelte
index c68e42fb3f..eacf3e2432 100644
--- a/src/lib/components/event/event-link.svelte
+++ b/src/lib/components/event/event-link.svelte
@@ -1,7 +1,7 @@
 <script lang="ts">
   import Link from '$lib/holocene/link.svelte';
   import { translate } from '$lib/i18n/translate';
-  import type { EventLink } from '$lib/types/events';
+  import type { EventLink } from '$lib/types';
   import { getEventLinkHref } from '$lib/utilities/event-link-href';
 
   export let link: EventLink;
diff --git a/src/lib/components/workflow/workflow-callback.svelte b/src/lib/components/workflow/workflow-callback.svelte
index 611ca9927b..4b25b83c54 100644
--- a/src/lib/components/workflow/workflow-callback.svelte
+++ b/src/lib/components/workflow/workflow-callback.svelte
@@ -7,7 +7,7 @@
   import { translate } from '$lib/i18n/translate';
   import { timeFormat } from '$lib/stores/time-format';
   import type { CallbackState } from '$lib/types';
-  import type { EventLink as Link } from '$lib/types/events';
+  import type { EventLink as Link } from '$lib/types';
   import type { Callback } from '$lib/types/nexus';
   import { formatDate } from '$lib/utilities/format-date';
   import { routeForNamespace } from '$lib/utilities/route-for';
diff --git a/src/lib/models/event-history/index.ts b/src/lib/models/event-history/index.ts
index a8cdfbb1c5..b8ed88a111 100644
--- a/src/lib/models/event-history/index.ts
+++ b/src/lib/models/event-history/index.ts
@@ -14,7 +14,11 @@ import {
 import { formatDate } from '$lib/utilities/format-date';
 import { isWorkflowTaskFailedEventDueToReset } from '$lib/utilities/get-workflow-task-failed-event';
 import { has } from '$lib/utilities/has';
-import { findAttributesAndKey } from '$lib/utilities/is-event-type';
+import {
+  findAttributesAndKey,
+  isWorkflowExecutionOptionsUpdatedEvent,
+  isWorkflowExecutionStartedEvent,
+} from '$lib/utilities/is-event-type';
 import { toEventNameReadable } from '$lib/utilities/screaming-enums';
 
 import { getEventBillableActions } from './get-event-billable-actions';
@@ -72,12 +76,17 @@ export const toEvent = (
   const category = getEventCategory(eventType);
 
   const { key, attributes } = findAttributesAndKey(historyEvent);
-  // TODO: When TS SDK supports new fields, remove this workaround
-  const completionLinks =
-    // eslint-disable-next-line @typescript-eslint/no-explicit-any
-    (attributes as any)?.completionCallbacks?.[0]?.links ||
-    // eslint-disable-next-line @typescript-eslint/no-explicit-any
-    (attributes as any)?.attachedCompletionCallbacks?.[0]?.links;
+
+  const completionCallbacks =
+    isWorkflowExecutionStartedEvent(historyEvent) &&
+    historyEvent.workflowExecutionStartedEventAttributes
+      ?.completionCallbacks?.[0]?.links;
+  const attachedCompletionCallbacks =
+    isWorkflowExecutionOptionsUpdatedEvent(historyEvent) &&
+    historyEvent.workflowExecutionOptionsUpdatedEventAttributes
+      ?.attachedCompletionCallbacks?.[0]?.links;
+
+  const completionLinks = completionCallbacks || attachedCompletionCallbacks;
   const links = historyEvent?.links || completionLinks || [];
   const event = {
     ...historyEvent,
diff --git a/src/lib/types/events.ts b/src/lib/types/events.ts
index 1fef868ff7..3f82d35f97 100644
--- a/src/lib/types/events.ts
+++ b/src/lib/types/events.ts
@@ -1,7 +1,7 @@
 import type { Timestamp } from '@temporalio/common';
 
 import type { EventGroup } from '$lib/models/event-groups/event-groups';
-import type { ActivityOptions } from '$lib/types';
+import type { ActivityOptions, EventLink } from '$lib/types';
 
 import type { Replace, Settings } from './global';
 
@@ -10,26 +10,6 @@ export type EventHistory = Replace<
   { events: HistoryEvent[] }
 >;
 
-export type EventLink = {
-  workflowEvent: {
-    eventRef?: {
-      eventType: string;
-      eventId?: string;
-    };
-    requestIdRef?: {
-      requestId: string;
-      eventType: string;
-    };
-    namespace: string;
-    workflowId: string;
-    runId: string;
-  };
-
-  batchJob?: {
-    jobId: string;
-  };
-};
-
 export type HistoryEvent = Replace<
   import('$lib/types').HistoryEvent,
   { eventType: EventType; eventId: string; links?: EventLink[] }
diff --git a/src/lib/types/index.ts b/src/lib/types/index.ts
index 1c7b8720e5..ca0014b768 100644
--- a/src/lib/types/index.ts
+++ b/src/lib/types/index.ts
@@ -171,6 +171,7 @@ export type CallbackState = temporal.api.enums.v1.CallbackState;
 export type PendingWorkflowTaskInfo =
   temporal.api.workflow.v1.IPendingWorkflowTaskInfo;
 export type VersioningBehavior = temporal.api.enums.v1.VersioningBehavior;
+export type EventType = temporal.api.enums.v1.EventType;
 
 // temporal.api.enums.v1.ResetReapplyExcludeType
 export enum ResetReapplyExcludeType {
@@ -251,6 +252,7 @@ export type BatchTerminateOperation =
 // api.nexus
 export type Endpoint = temporal.api.nexus.v1.IEndpoint;
 export type EndpointSpec = temporal.api.nexus.v1.IEndpointSpec;
+export type EventLink = temporal.api.common.v1.ILink;
 
 // api.failure
 export type Failure = temporal.api.failure.v1.IFailure;
diff --git a/src/lib/types/nexus.ts b/src/lib/types/nexus.ts
index 558337906b..f44b412867 100644
--- a/src/lib/types/nexus.ts
+++ b/src/lib/types/nexus.ts
@@ -4,8 +4,7 @@ import type {
   EndpointSpec,
   Callback as ICallback,
 } from '$lib/types';
-
-import type { EventLink } from './events';
+import type { EventLink } from '$lib/types';
 
 export interface NexusEndpointSpec extends EndpointSpec {
   descriptionString?: string;
diff --git a/src/lib/utilities/event-link-href.ts b/src/lib/utilities/event-link-href.ts
index d340f311b0..563ba275d5 100644
--- a/src/lib/utilities/event-link-href.ts
+++ b/src/lib/utilities/event-link-href.ts
@@ -1,4 +1,4 @@
-import type { EventLink } from '$lib/types/events';
+import type { EventLink, EventType } from '$lib/types';
 
 import { routeForEventHistory, routeForEventHistoryEvent } from './route-for';
 
@@ -12,7 +12,7 @@ export const getEventLinkHref = (link: EventLink): string => {
     });
   } else if (
     link.workflowEvent?.eventRef?.eventType ===
-    'EVENT_TYPE_WORKFLOW_EXECUTION_STARTED'
+    ('EVENT_TYPE_WORKFLOW_EXECUTION_STARTED' as unknown as EventType)
   ) {
     return routeForEventHistoryEvent({
       namespace: link.workflowEvent.namespace,