diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 566441b..04ee7c3 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -25,7 +25,7 @@ jobs:
         run: echo "::set-output name=dir::$(composer config cache-files-dir)"
 
       - name: Cache dependencies
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: ${{ steps.composer-cache.outputs.dir }}
           key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.lock') }}
diff --git a/src/Codec/Types/metadataV14.php b/src/Codec/Types/metadataV14.php
index ba426b9..0e8a5a7 100644
--- a/src/Codec/Types/metadataV14.php
+++ b/src/Codec/Types/metadataV14.php
@@ -101,7 +101,7 @@ public function decode(): array
                     foreach ($variant["fields"] as $v) {
                         $args[] = $this->registeredSiType[$v["type"]];
                     }
-                    $events[] = ["name" => $variant["name"], "args" => $args, "docs" => $variant["docs"]];
+                    $events[] = ["name" => $variant["name"], "args" => $args, "docs" => $variant["docs"], "lookup_index" => $variant["index"]];
                 }
             }
 
@@ -112,7 +112,7 @@ public function decode(): array
             }
             // event lookup
             foreach ($events as $eventIndex => $event) {
-                $lookup = Utils::padLeft(dechex($pallet["index"]), 2) . Utils::padLeft(dechex($eventIndex), 2);
+                $lookup = Utils::padLeft(dechex($pallet["index"]), 2) . Utils::padLeft(dechex($event["lookup_index"]), 2);
                 $metadataRaw["event_index"][$lookup] = ["module" => ["name" => $pallet["name"]], "call" => $event];
             }