diff --git a/lib/src/pool/pool_impl.dart b/lib/src/pool/pool_impl.dart
index 3758bc16..5be688b8 100644
--- a/lib/src/pool/pool_impl.dart
+++ b/lib/src/pool/pool_impl.dart
@@ -198,7 +198,6 @@ class PoolImplementation<L> implements Pool<L> {
     //       flag is set, otherwise race conditions may create conflicts or
     //       pool close may miss the connection.
     _connections.add(newc);
-    print(_connections.length);
     return newc;
   }
 }
@@ -230,13 +229,13 @@ class _PoolConnection implements Connection {
 
   bool _isExpired() {
     final age = DateTime.now().difference(_opened);
-    if (age > _pool._settings.maxConnectionAge) {
+    if (age >= _pool._settings.maxConnectionAge) {
       return true;
     }
-    if (_elapsedInUse > _pool._settings.maxSessionUse) {
+    if (_elapsedInUse >= _pool._settings.maxSessionUse) {
       return true;
     }
-    if (_queryCount > _pool._settings.maxQueryCount) {
+    if (_queryCount >= _pool._settings.maxQueryCount) {
       return true;
     }
     return false;
diff --git a/lib/src/v3/connection.dart b/lib/src/v3/connection.dart
index b476beb2..308dfa3f 100644
--- a/lib/src/v3/connection.dart
+++ b/lib/src/v3/connection.dart
@@ -290,12 +290,12 @@ class PgConnectionImplementation extends _PgSessionBase implements Connection {
   // transaction and should be reporte to the user.
   _TransactionSession? _activeTransaction;
 
-  final Map<String, String> _parameters = {};
+  final _parameters = <String, String>{};
 
   var _statementCounter = 0;
   var _portalCounter = 0;
 
-  late final _Channels _channels = _Channels(this);
+  late final _channels = _Channels(this);
 
   @override
   Channels get channels => _channels;
@@ -364,7 +364,7 @@ class PgConnectionImplementation extends _PgSessionBase implements Connection {
     // Unlike runTx, this doesn't need any locks. An active transaction changes
     // the state of the connection, this method does not. If methods requiring
     // locks are called by [fn], these methods will aquire locks as needed.
-    return Future.sync(() => fn(session));
+    return Future<R>(() => fn(session));
   }
 
   @override
diff --git a/pubspec.yaml b/pubspec.yaml
index f34984e5..153fe280 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,6 +1,6 @@
 name: postgres
 description: PostgreSQL database driver. Supports statement reuse and binary protocol and connection pooling.
-version: 3.0.0-beta.1
+version: 3.0.0-rc.1
 homepage: https://github.com/isoos/postgresql-dart
 topics:
   - sql