diff --git a/.github/workflows/govulncheck.yml b/.github/workflows/govulncheck.yml
index d02d78055b..b40d1d78d2 100644
--- a/.github/workflows/govulncheck.yml
+++ b/.github/workflows/govulncheck.yml
@@ -22,7 +22,7 @@ jobs:
           FILES: |
             go.mod
             go.sum
-      - uses: golang/govulncheck-action@v1.0.2
+      - uses: golang/govulncheck-action@v1.0.3
         id: govulncheck
         if: env.GIT_DIFF
         with:
diff --git a/.github/workflows/release-umee.yml b/.github/workflows/release-umee.yml
index a6e35f04d5..6acd409bcb 100644
--- a/.github/workflows/release-umee.yml
+++ b/.github/workflows/release-umee.yml
@@ -35,7 +35,7 @@ jobs:
           make proto-update-swagger-docs
 
       - name: goreleaser test-build
-        uses: goreleaser/goreleaser-action@v5
+        uses: goreleaser/goreleaser-action@v6
         if: github.event_name == 'pull_request' && contains(github.event.pull_request.labels.*.name, 'Enable:ReleaseBuild')
         with:
           version: latest
@@ -43,7 +43,7 @@ jobs:
         env:
           TM_VERSION: ${{ env.TM_VERSION }}
       - name: Release
-        uses: goreleaser/goreleaser-action@v5
+        uses: goreleaser/goreleaser-action@v6
         if: startsWith(github.ref, 'refs/tags/')
         with:
           version: latest
diff --git a/x/auction/keeper/rewards.go b/x/auction/keeper/rewards.go
index 1ce4914c1b..6e7c8086c7 100644
--- a/x/auction/keeper/rewards.go
+++ b/x/auction/keeper/rewards.go
@@ -82,20 +82,21 @@ func (k Keeper) rewardsBid(msg *auction.MsgRewardsBid) error {
 	sender, err := sdk.AccAddressFromBech32(msg.Sender)
 	util.Panic(err)
 
-	if !bytes.Equal(sender, lastBid.Bidder) {
-		returned := coin.UmeeInt(lastBid.Amount)
-		if err = k.sendFromModule(lastBid.Bidder, returned); err != nil {
-			return err
-		}
-		if err = k.sendToModule(sender, msg.Amount); err != nil {
-			return err
-		}
-	} else {
-		diff := msg.Amount.SubAmount(lastBid.Amount)
-		if err = k.sendToModule(sender, diff); err != nil {
-			return err
+	toAuction := msg.Amount
+	if lastBid != nil {
+		if bytes.Equal(sender, lastBid.Bidder) {
+			// bidder updates his last bid: send only diff
+			toAuction = msg.Amount.SubAmount(lastBid.Amount)
+		} else {
+			returned := coin.UmeeInt(lastBid.Amount)
+			if err = k.sendFromModule(lastBid.Bidder, returned); err != nil {
+				return err
+			}
 		}
 	}
+	if err = k.sendToModule(sender, toAuction); err != nil {
+		return err
+	}
 
 	bid := auction.Bid{Bidder: sender, Amount: msg.Amount.Amount}
 	return store.SetValue(k.store, key, &bid, keyMsg)