diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index df70370..8eb38cc 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -35,7 +35,7 @@ jobs:
 
       - uses: actions/setup-go@v3
         with:
-          go-version: "1.17"
+          go-version: "1.21"
 
       - name: install protobuf
         run: |
diff --git a/hstream.proto b/hstream.proto
index e6c5aa9..986c82d 100644
--- a/hstream.proto
+++ b/hstream.proto
@@ -765,6 +765,16 @@ enum QueryStats {
 
 enum ViewStats { TotalExecuteQueries = 0; }
 
+enum CacheStoreStats {
+  CSAppendInBytes = 0;
+  CSAppendInRecords = 1;
+  CSAppendTotal = 2;
+  CSAppendFailed = 3;
+  CSReadInBytes = 4;
+  CSReadInRecords = 5;
+  CSDeliveredInRecords = 6;
+}
+
 message StatType {
   oneof stat {
     StreamStats streamStat = 1;
@@ -772,6 +782,7 @@ message StatType {
     ConnectorStats connStat = 3;
     QueryStats queryStat = 4;
     ViewStats viewStat = 5;
+    CacheStoreStats cacheStoreStat = 6;
   }
 }