diff --git a/teps/0148-summaryaggregation-api-for-tekton-results.md b/teps/0148-summaryaggregation-api-for-tekton-results.md
index 0a17bf109..8ff3a3ba1 100644
--- a/teps/0148-summaryaggregation-api-for-tekton-results.md
+++ b/teps/0148-summaryaggregation-api-for-tekton-results.md
@@ -1,8 +1,8 @@
 ---
-status: proposed
+status: implemented
 title: Summary/Aggregation API for Tekton Results
 creation-date: '2023-10-11'
-last-updated: '2023-10-11'
+last-updated: '2024-02-28'
 authors:
   - '@avinal'
   - '@khrm'
diff --git a/teps/README.md b/teps/README.md
index cb9e39213..e0b6a9dc4 100644
--- a/teps/README.md
+++ b/teps/README.md
@@ -137,7 +137,7 @@ This is the complete list of Tekton TEPs:
 |[TEP-0145](0145-cel-in-whenexpression.md) | CEL in WhenExpression | implemented | 2023-10-22 |
 |[TEP-0146](0146-parameters-in-script.md) | Parameters in Script | proposed | 2023-10-02 |
 |[TEP-0147](0147-tekton-artifacts-phase1.md) | Tekton Artifacts phase 1 | implementable | 2024-02-15 |
-|[TEP-0148](0148-summaryaggregation-api-for-tekton-results.md) | Summary/Aggregation API for Tekton Results | proposed | 2023-10-11 |
+|[TEP-0148](0148-summaryaggregation-api-for-tekton-results.md) | Summary/Aggregation API for Tekton Results | implemented | 2024-02-28 |
 |[TEP-0149](0149-tekton-cli-local-data-upload.md) | Tekton CLI Local Data Upload | proposed | 2023-10-31 |
 |[TEP-0150](0150-displayname-in-matrix.md) | displayName in Matrix | implementable | 2024-02-08 |
 |[TEP-0151](0151-error-attribution-via-condition-status.md) | Error Attribution via Conditions Status | proposed | 2024-01-26 |