diff --git a/CHANGELOG.md b/CHANGELOG.md
index 82e9c463..c7d08bf8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,11 @@
+* Changed InvalidCastException to InvalidOperationException in YdbParameter.
+* Added specification tests: YdbCommandTests and YdbParameterTests.
+* YdbConnection.Database returns string.Empty if ConnectionStringBuilder is null.
+* Propagated cancellationToken in Execute[.*]Async methods.
+* When YdbCommand has an open data reader, it throws InvalidOperationException on the setters: CommandText, DbConnection.
+* Added checkers to YdbCommand.Prepare().
+* CommandText getter doesn't throw an exception if the CommandText property has not been initialized.
+
 ## v0.11.0
 * Fix bug: GetValue(int ordinal) return DBNull.Value if fetched NULL value.
 * Fix: NextResult() moves to the next result and skip the first ResultSet.
diff --git a/src/Ydb.Sdk/src/Ado/YdbCommand.cs b/src/Ydb.Sdk/src/Ado/YdbCommand.cs
index 946304a3..01ffbca0 100644
--- a/src/Ydb.Sdk/src/Ado/YdbCommand.cs
+++ b/src/Ydb.Sdk/src/Ado/YdbCommand.cs
@@ -87,7 +87,7 @@ public override string CommandText
         [param: AllowNull]
         set
         {
-            if (_ydbConnection?.LastReader?.IsOpen ?? false)
+            if (_ydbConnection?.IsBusy ?? false)
             {
                 throw new InvalidOperationException("An open data reader exists for this command");
             }