diff --git a/CHANGELOG.md b/CHANGELOG.md
index de6bcfa2..621db43c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 2.7.1
+
+* Nullable topics.
+
 ## 2.7.0
 
 * Use http package version ^1.1.0.
diff --git a/pubspec.yaml b/pubspec.yaml
index 0dabbf57..08e542b0 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,6 +1,6 @@
 name: web3dart
 description: Dart library to connect to Ethereum clients. Send transactions and interact with smart contracts!
-version: 2.7.0
+version: 2.7.1
 homepage: https://pwa.ir
 repository: https://github.com/xclud/web3dart
 
@@ -10,7 +10,7 @@ environment:
 dependencies:
   pointycastle: ^3.7.3
   sec: ^1.0.1
-  http: ^1.1.0
+  http: ">=0.13.1 <2.0.0"
   uuid: ^3.0.7
   json_rpc_2: ^3.0.2
   stream_transform: ^2.1.0