diff --git a/specification/ai/Azure.AI.Projects/tspconfig.yaml b/specification/ai/Azure.AI.Projects/tspconfig.yaml
index 6208c9ba1d3c..b87612461923 100644
--- a/specification/ai/Azure.AI.Projects/tspconfig.yaml
+++ b/specification/ai/Azure.AI.Projects/tspconfig.yaml
@@ -13,6 +13,7 @@ options:
     package-mode: "dataplane"
     package-dir: "azure-ai-projects-dp1"
     package-name: "{package-dir}"
+    api-version: "2025-05-15-preview"
     flavor: azure
     generate-test: false
     generate-sample: false
@@ -21,12 +22,14 @@ options:
     package-dir: "Azure.AI.Projects.1DP"
     namespace: "Azure.AI.Projects.1DP"
     package-name: "{package-dir}"
+    api-version: "2025-05-15-preview"
     model-namespace: false
     flavor: azure
     generate-test: false
     generate-sample: false
   "@azure-tools/typespec-ts":
     package-dir: "ai-projects-1dp"
+    api-version: "2025-05-15-preview"
     generateTest: true
     generateMetadata: false
     packageDetails: