diff --git a/CHANGELOG.md b/CHANGELOG.md
index b500d776..5d6d2eef 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,7 +1,6 @@
 # 1.15.6
 
 - Added missing methods in the `InlineKeyboard`
-- Updated Dart SDK constraints to `>=2.17.7`
 
 # 1.15.5
 
diff --git a/pubspec.yaml b/pubspec.yaml
index c10f4f35..f9d8b566 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -10,7 +10,7 @@ topics:
   - bot-framework
 
 environment:
-  sdk: ">=2.17.7"
+  sdk: ">=2.17.7 <4.0.0"
 
 dependencies:
   dio: ^5.4.0