diff --git a/CHANGELOG.md b/CHANGELOG.md
index aa9cd13..8fd4ba7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## [5.1.1] - 28.05.2022
+
+* Support older sdk versions
+
 ## [5.1.0] - 28.05.2022
 
 * Make package backwards compatible to Flutter < 3.0.0 
diff --git a/README.md b/README.md
index a933af6..e4ec170 100644
--- a/README.md
+++ b/README.md
@@ -18,7 +18,7 @@ A flutter `ListView` in which list items can be grouped to sections.
 Add the package to your pubspec.yaml:
 
 ```yaml
- grouped_list: ^5.1.0
+ grouped_list: ^5.1.1
  ```
  
  In your dart file, import the library:
diff --git a/example/pubspec.lock b/example/pubspec.lock
index e286195..8c1041b 100644
--- a/example/pubspec.lock
+++ b/example/pubspec.lock
@@ -73,7 +73,7 @@ packages:
       path: ".."
       relative: true
     source: path
-    version: "5.1.0"
+    version: "5.1.1"
   intl:
     dependency: "direct main"
     description:
@@ -171,5 +171,5 @@ packages:
     source: hosted
     version: "2.1.2"
 sdks:
-  dart: ">=2.17.0 <3.0.0"
+  dart: ">=2.17.0-206.0.dev <3.0.0"
   flutter: ">=1.17.0"
diff --git a/example/pubspec.yaml b/example/pubspec.yaml
index fc6cb66..22dc4fb 100644
--- a/example/pubspec.yaml
+++ b/example/pubspec.yaml
@@ -4,7 +4,7 @@ publish_to: 'none'
 version: 2.0.0
 
 environment:
-  sdk: ">=2.17.0 <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.17.0"
 
 dependencies:
diff --git a/pubspec.yaml b/pubspec.yaml
index 0fdcd52..96f6d0e 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,10 +1,9 @@
 name: grouped_list
 description: A Flutter ListView where the list items can be grouped into sections.
-version: 5.1.0
+version: 5.1.1
 homepage: https://begnis.dev
 repository: https://github.com/Dimibe/grouped_list
 
-
 environment:
   sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.17.0"