diff --git a/CHANGELOG_PENDING.md b/CHANGELOG_PENDING.md
index aadc3500..39be1c69 100644
--- a/CHANGELOG_PENDING.md
+++ b/CHANGELOG_PENDING.md
@@ -28,3 +28,4 @@ program](https://hackerone.com/tendermint).
 
 - [config] \#3868 move misplaced `max_msg_bytes` into mempool section
 - [store] \#3893 register block amino, not just crypto
+- [rpc] [\#3910](https://github.com/tendermint/tendermint/pull/3910) protect subscription access from race conditions (@gchaincl)
diff --git a/rpc/client/httpclient.go b/rpc/client/httpclient.go
index 85f065b6..c4334523 100644
--- a/rpc/client/httpclient.go
+++ b/rpc/client/httpclient.go
@@ -453,6 +453,8 @@ func (w *WSEvents) UnsubscribeAll(ctx context.Context, subscriber string) error
 func (w *WSEvents) redoSubscriptionsAfter(d time.Duration) {
 	time.Sleep(d)
 
+	w.mtx.RLock()
+	defer w.mtx.RUnlock()
 	for q := range w.subscriptions {
 		err := w.ws.Subscribe(context.Background(), q)
 		if err != nil {