diff --git a/temporalnexus/link_converter.go b/temporalnexus/link_converter.go
index 2c25ca1b6..fbb6b22af 100644
--- a/temporalnexus/link_converter.go
+++ b/temporalnexus/link_converter.go
@@ -59,6 +59,7 @@ var (
 		rePatternWorkflowID,
 		rePatternRunID,
 	))
+	eventReferenceType = string((&commonpb.Link_WorkflowEvent_EventReference{}).ProtoReflect().Descriptor().Name())
 )
 
 // ConvertLinkWorkflowEventToNexusLink converts a Link_WorkflowEvent type to Nexus Link.
@@ -128,7 +129,7 @@ func ConvertNexusLinkToLinkWorkflowEvent(link nexus.Link) (*commonpb.Link_Workfl
 	}
 
 	switch refType := link.URL.Query().Get(linkWorkflowEventReferenceTypeKey); refType {
-	case string((&commonpb.Link_WorkflowEvent_EventReference{}).ProtoReflect().Descriptor().Name()):
+	case eventReferenceType:
 		eventRef, err := convertURLQueryToLinkWorkflowEventEventReference(link.URL.Query())
 		if err != nil {
 			return nil, fmt.Errorf("failed to parse link to Link_WorkflowEvent: %w", err)
@@ -148,11 +149,11 @@ func ConvertNexusLinkToLinkWorkflowEvent(link nexus.Link) (*commonpb.Link_Workfl
 
 func convertLinkWorkflowEventEventReferenceToURLQuery(eventRef *commonpb.Link_WorkflowEvent_EventReference) string {
 	values := url.Values{}
-	values.Set(linkWorkflowEventReferenceTypeKey, string(eventRef.ProtoReflect().Descriptor().Name()))
+	values.Set(linkWorkflowEventReferenceTypeKey, eventReferenceType)
 	if eventRef.GetEventId() > 0 {
 		values.Set(linkEventReferenceEventIDKey, strconv.FormatInt(eventRef.GetEventId(), 10))
 	}
-	values.Set(linkEventReferenceEventTypeKey, eventRef.GetEventType().String())
+	values.Set(linkEventReferenceEventTypeKey, enumspb.EventType_name[int32(eventRef.GetEventType())])
 	return values.Encode()
 }
 
diff --git a/temporalnexus/link_converter_test.go b/temporalnexus/link_converter_test.go
index bd344a596..d8c8e9807 100644
--- a/temporalnexus/link_converter_test.go
+++ b/temporalnexus/link_converter_test.go
@@ -63,11 +63,11 @@ func TestConvertLinkWorkflowEventToNexusLink(t *testing.T) {
 					Scheme:   "temporal",
 					Path:     "/namespaces/ns/workflows/wf-id/run-id/history",
 					RawPath:  "/namespaces/ns/workflows/wf-id/run-id/history",
-					RawQuery: "eventID=1&eventType=WorkflowExecutionStarted&referenceType=EventReference",
+					RawQuery: "eventID=1&eventType=EVENT_TYPE_WORKFLOW_EXECUTION_STARTED&referenceType=EventReference",
 				},
 				Type: "temporal.api.common.v1.Link.WorkflowEvent",
 			},
-			outputURL: "temporal:///namespaces/ns/workflows/wf-id/run-id/history?eventID=1&eventType=WorkflowExecutionStarted&referenceType=EventReference",
+			outputURL: "temporal:///namespaces/ns/workflows/wf-id/run-id/history?eventID=1&eventType=EVENT_TYPE_WORKFLOW_EXECUTION_STARTED&referenceType=EventReference",
 		},
 		{
 			name: "valid with angle bracket",
@@ -87,11 +87,11 @@ func TestConvertLinkWorkflowEventToNexusLink(t *testing.T) {
 					Scheme:   "temporal",
 					Path:     "/namespaces/ns/workflows/wf-id>/run-id/history",
 					RawPath:  "/namespaces/ns/workflows/wf-id%3E/run-id/history",
-					RawQuery: "eventID=1&eventType=WorkflowExecutionStarted&referenceType=EventReference",
+					RawQuery: "eventID=1&eventType=EVENT_TYPE_WORKFLOW_EXECUTION_STARTED&referenceType=EventReference",
 				},
 				Type: "temporal.api.common.v1.Link.WorkflowEvent",
 			},
-			outputURL: "temporal:///namespaces/ns/workflows/wf-id%3E/run-id/history?eventID=1&eventType=WorkflowExecutionStarted&referenceType=EventReference",
+			outputURL: "temporal:///namespaces/ns/workflows/wf-id%3E/run-id/history?eventID=1&eventType=EVENT_TYPE_WORKFLOW_EXECUTION_STARTED&referenceType=EventReference",
 		},
 		{
 			name: "valid with slash",
@@ -111,11 +111,11 @@ func TestConvertLinkWorkflowEventToNexusLink(t *testing.T) {
 					Scheme:   "temporal",
 					Path:     "/namespaces/ns/workflows/wf-id//run-id/history",
 					RawPath:  "/namespaces/ns/workflows/wf-id%2F/run-id/history",
-					RawQuery: "eventID=1&eventType=WorkflowExecutionStarted&referenceType=EventReference",
+					RawQuery: "eventID=1&eventType=EVENT_TYPE_WORKFLOW_EXECUTION_STARTED&referenceType=EventReference",
 				},
 				Type: "temporal.api.common.v1.Link.WorkflowEvent",
 			},
-			outputURL: "temporal:///namespaces/ns/workflows/wf-id%2F/run-id/history?eventID=1&eventType=WorkflowExecutionStarted&referenceType=EventReference",
+			outputURL: "temporal:///namespaces/ns/workflows/wf-id%2F/run-id/history?eventID=1&eventType=EVENT_TYPE_WORKFLOW_EXECUTION_STARTED&referenceType=EventReference",
 		},
 		{
 			name: "valid event id missing",
@@ -134,11 +134,11 @@ func TestConvertLinkWorkflowEventToNexusLink(t *testing.T) {
 					Scheme:   "temporal",
 					Path:     "/namespaces/ns/workflows/wf-id/run-id/history",
 					RawPath:  "/namespaces/ns/workflows/wf-id/run-id/history",
-					RawQuery: "eventType=WorkflowExecutionStarted&referenceType=EventReference",
+					RawQuery: "eventType=EVENT_TYPE_WORKFLOW_EXECUTION_STARTED&referenceType=EventReference",
 				},
 				Type: "temporal.api.common.v1.Link.WorkflowEvent",
 			},
-			outputURL: "temporal:///namespaces/ns/workflows/wf-id/run-id/history?eventType=WorkflowExecutionStarted&referenceType=EventReference",
+			outputURL: "temporal:///namespaces/ns/workflows/wf-id/run-id/history?eventType=EVENT_TYPE_WORKFLOW_EXECUTION_STARTED&referenceType=EventReference",
 		},
 	}
 
@@ -166,7 +166,7 @@ func TestConvertNexusLinkToLinkWorkflowEvent(t *testing.T) {
 				URL: &url.URL{
 					Scheme:   "temporal",
 					Path:     "/namespaces/ns/workflows/wf-id/run-id/history",
-					RawQuery: "referenceType=EventReference&eventID=1&eventType=WorkflowExecutionStarted",
+					RawQuery: "referenceType=EventReference&eventID=1&eventType=EVENT_TYPE_WORKFLOW_EXECUTION_STARTED",
 				},
 				Type: "temporal.api.common.v1.Link.WorkflowEvent",
 			},
@@ -189,7 +189,7 @@ func TestConvertNexusLinkToLinkWorkflowEvent(t *testing.T) {
 					Scheme:   "temporal",
 					Path:     "/namespaces/ns/workflows/wf-id>/run-id/history",
 					RawPath:  "/namespaces/ns/workflows/wf-id%2E/run-id/history",
-					RawQuery: "referenceType=EventReference&eventID=1&eventType=WorkflowExecutionStarted",
+					RawQuery: "referenceType=EventReference&eventID=1&eventType=EVENT_TYPE_WORKFLOW_EXECUTION_STARTED",
 				},
 				Type: "temporal.api.common.v1.Link.WorkflowEvent",
 			},
@@ -212,7 +212,7 @@ func TestConvertNexusLinkToLinkWorkflowEvent(t *testing.T) {
 					Scheme:   "temporal",
 					Path:     "/namespaces/ns/workflows/wf-id//run-id/history",
 					RawPath:  "/namespaces/ns/workflows/wf-id%2F/run-id/history",
-					RawQuery: "referenceType=EventReference&eventID=1&eventType=WorkflowExecutionStarted",
+					RawQuery: "referenceType=EventReference&eventID=1&eventType=EVENT_TYPE_WORKFLOW_EXECUTION_STARTED",
 				},
 				Type: "temporal.api.common.v1.Link.WorkflowEvent",
 			},
@@ -235,7 +235,7 @@ func TestConvertNexusLinkToLinkWorkflowEvent(t *testing.T) {
 					Scheme:   "temporal",
 					Path:     "/namespaces/ns/workflows/wf-id/run-id/history",
 					RawPath:  "/namespaces/ns/workflows/wf-id/run-id/history",
-					RawQuery: "referenceType=EventReference&eventID=&eventType=WorkflowExecutionStarted",
+					RawQuery: "referenceType=EventReference&eventID=&eventType=EVENT_TYPE_WORKFLOW_EXECUTION_STARTED",
 				},
 				Type: "temporal.api.common.v1.Link.WorkflowEvent",
 			},
@@ -257,7 +257,7 @@ func TestConvertNexusLinkToLinkWorkflowEvent(t *testing.T) {
 					Scheme:   "random",
 					Path:     "/namespaces/ns/workflows/wf-id/run-id/history",
 					RawPath:  "/namespaces/ns/workflows/wf-id/run-id/history",
-					RawQuery: "referenceType=EventReference&eventID=1&eventType=WorkflowExecutionStarted",
+					RawQuery: "referenceType=EventReference&eventID=1&eventType=EVENT_TYPE_WORKFLOW_EXECUTION_STARTED",
 				},
 				Type: "temporal.api.common.v1.Link.WorkflowEvent",
 			},
@@ -270,7 +270,7 @@ func TestConvertNexusLinkToLinkWorkflowEvent(t *testing.T) {
 					Scheme:   "temporal",
 					Path:     "/namespaces/ns/workflows/wf-id/run-id/",
 					RawPath:  "/namespaces/ns/workflows/wf-id/run-id/",
-					RawQuery: "referenceType=EventReference&eventID=1&eventType=WorkflowExecutionStarted",
+					RawQuery: "referenceType=EventReference&eventID=1&eventType=EVENT_TYPE_WORKFLOW_EXECUTION_STARTED",
 				},
 				Type: "temporal.api.common.v1.Link.WorkflowEvent",
 			},
@@ -283,7 +283,7 @@ func TestConvertNexusLinkToLinkWorkflowEvent(t *testing.T) {
 					Scheme:   "temporal",
 					Path:     "/namespaces//workflows/wf-id/run-id/history",
 					RawPath:  "/namespaces//workflows/wf-id/run-id/history",
-					RawQuery: "referenceType=EventReference&eventID=1&eventType=WorkflowExecutionStarted",
+					RawQuery: "referenceType=EventReference&eventID=1&eventType=EVENT_TYPE_WORKFLOW_EXECUTION_STARTED",
 				},
 				Type: "temporal.api.common.v1.Link.WorkflowEvent",
 			},
@@ -296,7 +296,7 @@ func TestConvertNexusLinkToLinkWorkflowEvent(t *testing.T) {
 					Scheme:   "temporal",
 					Path:     "/namespaces/ns/workflows/wf-id/run-id/history",
 					RawPath:  "/namespaces/ns/workflows/wf-id/run-id/history",
-					RawQuery: "referenceType=EventReference&eventID=1&eventType=WorkflowExecution",
+					RawQuery: "referenceType=EventReference&eventID=1&eventType=EVENT_TYPE_INVALID",
 				},
 				Type: "temporal.api.common.v1.Link.WorkflowEvent",
 			},