diff --git a/CHANGELOG.md b/CHANGELOG.md
index ef7c536..4c34253 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+## 3.1.0 - 30.06.2023
+* Enhancement: Add `snackBarPosition` parameter by [fox-avokadik](https://github.com/fox-avokadik)
+* Correct errors in the example
+* Update README.md
+
 ## 3.0.0+1 - 27.12.2022
 * Update README.md
 
diff --git a/README.md b/README.md
index fb1f270..3872085 100644
--- a/README.md
+++ b/README.md
@@ -17,7 +17,7 @@ but we have a CustomSnackBar for example.
 
 ```dart
 showTopSnackBar(
-    context,
+    Overlay.of(context),
     CustomSnackBar.success(
       message:
           "Good job, your release is successful. Have a nice day",
@@ -27,7 +27,7 @@ showTopSnackBar(
 
 ```dart
 showTopSnackBar(
-    context,
+    Overlay.of(context),
     CustomSnackBar.info(
       message:
           "There is some information. You need to do something with that",
@@ -37,7 +37,7 @@ showTopSnackBar(
 
 ```dart
 showTopSnackBar(
-    context,
+    Overlay.of(context),
     CustomSnackBar.error(
       message:
           "Something went wrong. Please check your credentials and try again",
@@ -52,7 +52,7 @@ AnimationController localAnimationController;
 TapBounceContainer(
     onTap: () {
         showTopSnackBar(
-            context,
+            Overlay.of(context),
             CustomSnackBar.info(
               message: "Persistent SnackBar",
             ),
diff --git a/example/assets/top-snackbar-example.gif b/example/assets/top-snackbar-example.gif
index 3482550..bce241f 100644
Binary files a/example/assets/top-snackbar-example.gif and b/example/assets/top-snackbar-example.gif differ
diff --git a/example/lib/main.dart b/example/lib/main.dart
index 6440a4b..ea0a5ea 100644
--- a/example/lib/main.dart
+++ b/example/lib/main.dart
@@ -8,14 +8,14 @@ void main() {
 }
 
 class MyApp extends StatefulWidget {
-  const MyApp({Key key}) : super(key: key);
+  const MyApp({Key? key}) : super(key: key);
 
   @override
   MyAppState createState() => MyAppState();
 }
 
 class MyAppState extends State<MyApp> {
-  AnimationController localAnimationController;
+  late AnimationController localAnimationController;
 
   @override
   Widget build(BuildContext context) {
diff --git a/example/test/widget_test.dart b/example/test/widget_test.dart
index 5f5a12d..52be3e0 100644
--- a/example/test/widget_test.dart
+++ b/example/test/widget_test.dart
@@ -19,7 +19,7 @@ void main() {
     expect(
       find.byWidgetPredicate(
         (Widget widget) =>
-            widget is Text && widget.data.startsWith('Running on:'),
+            widget is Text && (widget.data?.startsWith('Running on:') ?? false),
       ),
       findsOneWidget,
     );
diff --git a/lib/custom_snack_bar.dart b/lib/custom_snack_bar.dart
index 747efe2..1babda7 100644
--- a/lib/custom_snack_bar.dart
+++ b/lib/custom_snack_bar.dart
@@ -128,7 +128,7 @@ class CustomSnackBarState extends State<CustomSnackBar> {
               padding: widget.messagePadding,
               child: Text(
                 widget.message,
-                style: theme.textTheme.bodyText2?.merge(widget.textStyle),
+                style: theme.textTheme.bodyMedium?.merge(widget.textStyle),
                 textAlign: widget.textAlign,
                 overflow: TextOverflow.ellipsis,
                 maxLines: widget.maxLines,
diff --git a/lib/safe_area_values.dart b/lib/safe_area_values.dart
index 48e78d1..43a5862 100644
--- a/lib/safe_area_values.dart
+++ b/lib/safe_area_values.dart
@@ -1,5 +1,6 @@
 import 'package:flutter/widgets.dart';
 
+/// A data class that is used to pass safe area values for snackbar
 class SafeAreaValues {
   const SafeAreaValues({
     this.left = true,
diff --git a/lib/tap_bounce_container.dart b/lib/tap_bounce_container.dart
index 2eed271..e2d8c88 100644
--- a/lib/tap_bounce_container.dart
+++ b/lib/tap_bounce_container.dart
@@ -17,6 +17,7 @@ class TapBounceContainer extends StatefulWidget {
   TapBounceContainerState createState() => TapBounceContainerState();
 }
 
+/// State for a [TapBounceContainer].
 class TapBounceContainerState extends State<TapBounceContainer>
     with SingleTickerProviderStateMixin {
   late double _scale;
diff --git a/lib/top_snack_bar.dart b/lib/top_snack_bar.dart
index d9f93f2..941ba8e 100644
--- a/lib/top_snack_bar.dart
+++ b/lib/top_snack_bar.dart
@@ -6,8 +6,12 @@ import 'package:top_snackbar_flutter/tap_bounce_container.dart';
 
 typedef ControllerCallback = void Function(AnimationController);
 
+/// Represents possible triggers to dismiss the snackbar.
 enum DismissType { onTap, onSwipe, none }
 
+/// Represents possible vertical position of snackbar.
+enum SnackBarPosition { top, bottom }
+
 OverlayEntry? _previousEntry;
 
 /// The [overlayState] argument is used to add specific overlay state.
@@ -42,10 +46,13 @@ OverlayEntry? _previousEntry;
 /// The [safeAreaValues] argument is used to specify the arguments of the
 /// [SafeArea] widget that wrap the snackbar.
 ///
-/// The [dismissType] argument specify which action to trigger to
+/// The [dismissType] argument specifies which action to trigger to
 /// dismiss the snackbar. Defaults to `TopSnackBarDismissType.onTap`
 ///
-/// The [dismissDirection] argument specify in which direction the snackbar
+/// The [snackBarPosition] argument specifies the vertical position of the snackbar.
+/// Defaults to [SnackBarPosition.top]
+///
+/// The [dismissDirection] argument specifies in which direction the snackbar
 /// can be dismissed. This argument is only used when [dismissType] is equal
 /// to `DismissType.onSwipe`. Defaults to `[DismissDirection.up]`
 void showTopSnackBar(
@@ -62,6 +69,7 @@ void showTopSnackBar(
   Curve reverseCurve = Curves.linearToEaseOut,
   SafeAreaValues safeAreaValues = const SafeAreaValues(),
   DismissType dismissType = DismissType.onTap,
+  SnackBarPosition snackBarPosition = SnackBarPosition.top,
   List<DismissDirection> dismissDirection = const [DismissDirection.up],
 }) {
   late OverlayEntry _overlayEntry;
@@ -83,6 +91,7 @@ void showTopSnackBar(
         reverseCurve: reverseCurve,
         safeAreaValues: safeAreaValues,
         dismissType: dismissType,
+        snackBarPosition: snackBarPosition,
         dismissDirections: dismissDirection,
         child: child,
       );
@@ -111,6 +120,7 @@ class _TopSnackBar extends StatefulWidget {
     required this.reverseCurve,
     required this.safeAreaValues,
     required this.dismissDirections,
+    required this.snackBarPosition,
     this.onTap,
     this.persistent = false,
     this.onAnimationControllerInit,
@@ -131,19 +141,19 @@ class _TopSnackBar extends StatefulWidget {
   final SafeAreaValues safeAreaValues;
   final DismissType dismissType;
   final List<DismissDirection> dismissDirections;
+  final SnackBarPosition snackBarPosition;
 
   @override
   _TopSnackBarState createState() => _TopSnackBarState();
 }
 
-class _TopSnackBarState extends State<_TopSnackBar>
-    with SingleTickerProviderStateMixin {
+class _TopSnackBarState extends State<_TopSnackBar> with SingleTickerProviderStateMixin {
   late final Animation<Offset> _offsetAnimation;
   late final AnimationController _animationController;
 
   Timer? _timer;
 
-  final _offsetTween = Tween(begin: const Offset(0, -1), end: Offset.zero);
+  late final Tween<Offset> _offsetTween;
 
   @override
   void initState() {
@@ -170,6 +180,15 @@ class _TopSnackBarState extends State<_TopSnackBar>
 
     widget.onAnimationControllerInit?.call(_animationController);
 
+    switch(widget.snackBarPosition) {
+      case SnackBarPosition.top:
+        _offsetTween = Tween<Offset>(begin: const Offset(0, -1), end: Offset.zero);
+        break;
+      case SnackBarPosition.bottom:
+        _offsetTween = Tween<Offset>(begin: const Offset(0, 1), end: Offset.zero);
+        break;
+    }
+
     _offsetAnimation = _offsetTween.animate(
       CurvedAnimation(
         parent: _animationController,
@@ -193,7 +212,8 @@ class _TopSnackBarState extends State<_TopSnackBar>
   @override
   Widget build(BuildContext context) {
     return Positioned(
-      top: widget.padding.top,
+      top: widget.snackBarPosition == SnackBarPosition.top ? widget.padding.top : null,
+      bottom: widget.snackBarPosition == SnackBarPosition.bottom ? widget.padding.bottom : null,
       left: widget.padding.left,
       right: widget.padding.right,
       child: SlideTransition(
@@ -204,8 +224,7 @@ class _TopSnackBarState extends State<_TopSnackBar>
           left: widget.safeAreaValues.left,
           right: widget.safeAreaValues.right,
           minimum: widget.safeAreaValues.minimum,
-          maintainBottomViewPadding:
-              widget.safeAreaValues.maintainBottomViewPadding,
+          maintainBottomViewPadding: widget.safeAreaValues.maintainBottomViewPadding,
           child: _buildDismissibleChild(),
         ),
       ),
diff --git a/pubspec.yaml b/pubspec.yaml
index 0da2740..19c084c 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,10 +1,10 @@
 name: top_snackbar_flutter
 description: Top snack bar package was created for nice and convenient way to inform users about what happened.
-version: 3.0.0+1
+version: 3.1.0
 homepage: https://github.com/LanarsInc/top-snackbar-flutter
 
 environment:
-  sdk: '>=2.12.0 <3.0.0'
+  sdk: '>=2.15.0 <4.0.0'
 
 dependencies:
   flutter:
diff --git a/test/top_snackbar_flutter_test.dart b/test/top_snackbar_flutter_test.dart
index 64f6e72..d503db5 100644
--- a/test/top_snackbar_flutter_test.dart
+++ b/test/top_snackbar_flutter_test.dart
@@ -7,12 +7,14 @@ void main() {
   TestWidgetsFlutterBinding.ensureInitialized();
 
   setUp(() {
-    channel.setMockMethodCallHandler((MethodCall methodCall) async {
+    TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger
+        .setMockMethodCallHandler(channel, (message) async {
       return '42';
     });
   });
 
   tearDown(() {
-    channel.setMockMethodCallHandler(null);
+    TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger
+        .setMockMethodCallHandler(channel, null);
   });
 }